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2JZ-GTE VVTi JZA80 Supra Engine Wiring

Page history last edited by wilbo666 3 days, 11 hours ago

 


 

Introduction

This page provides information in regards to 2JZ-GTE VVTi engine wiring as found in the Japanese JZA80 Toyota Supra.

 

JZA80 Toyota Supra 2JZ-GTE VVTi Engine ECU Part Numbers

Toyota Part Number
Dates
Transmission
89661‑14830 09/1997 to 07/2002
Manual Transmission
89661‑14820 09/1997 to 07/2002
Automatic Transmission

 

Note that the later revision engine ECU has an engine immobilizer inbuilt to the engine ECU.

 

JZA80 Toyota Supra 2JZ-GTE VVTi Engine ECU Pinout

Plug Pin Symbol Definition Input / Output What Why How Link
B74 1 #30 No. 3 Injector Output This pin is used to control the No.3 fuel injector. The fuel injectors are electronically controlled by the engine ECU. This pin is connected to Ground inside the ECU as required to turn the fuel injector ON.  The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.  
B74 2 #40 Cyl 4 Injector Driver Output This pin is used to control the No.4 fuel injector. The fuel injectors are electronically controlled by the engine ECU. This pin is connected to Ground inside the ECU as required to turn the fuel injector ON.  The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.  
B74 3 #50 Cyl 5 Injector Driver Output This pin is used to control the No.5 fuel injector. The fuel injectors are electronically controlled by the engine ECU. This pin is connected to Ground inside the ECU as required to turn the fuel injector ON.  The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.  
B74 4 #60 Cyl 6 Injector Driver Output This pin is used to control the No.6 fuel injector. The fuel injectors are electronically controlled by the engine ECU. This pin is connected to Ground inside the ECU as required to turn the fuel injector ON.  The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.  
B74 5 VSV1 Intake Air Bypass Valve Vacuum Switching Valve Output This pin is used to control the VSV which is used to open / close the Intake Air Bypass Valve that is a component of the sequential turbo system. The Intake Air Control Valve allows pressurised air to exit the rear turbocharger allowing it to fully come online as part of the sequential turbo system. This pin is connected to Ground inside the ECU as required to turn the Intake Air Control Valve VSV ON allowing pressurised intake air to open the Intake Air Control Valve.  One side of the VSV should be wired to this pin and one side of VSV should be wired to battery voltage (Main EFI Relay switched).  
B74 6 / / / / / /  
B74 7 M- ETCS-i  Motor Output This pin is used to control the electronic throttle control motor. The throttle is controlled by an electric motor that is controlled by the engine ECU.  Having the throttle controlled by the engine ECU allows idle speed control, traction control, etc to be built directly into the engine ECU simplifying the system. This pin is used together with the M+ pin to power the electric motor to allow it to be opened and closed by the engine ECU as required.  The ETCS-i clutch must be engaged for the electric motor to be able to open or close the throttle.  The M+ and M- pins are triggered by the engine ECU in a PWM fashion.  
B74 8 M+ ETCS-i  Motor Output This pin is used to control the electronic throttle control motor. The throttle is controlled by an electric motor that is controlled by the engine ECU.  Having the throttle controlled by the engine ECU allows idle speed control, traction control, etc to be built directly into the engine ECU simplifying the system. This pin is used together with the M- pin to power the electric motor to allow it to be opened and closed by the engine ECU as required.  The ETCS-i clutch must be engaged for the electric motor to be able to open or close the throttle.  The M+ and M- pins are triggered by the engine ECU in a PWM fashion.  
B74 9 ME01 ETCS-i Ground Input Ground Used to supply a Ground path to allow current to flow.  A separate ground is used for the electronic throttle control system to reduce noise introduced between systems. This pin connects to Ground or the battery negative via the Intake Manifold Rear Earth.  
B74 10 G2 Intake Camshaft Position Sensor Input This pin is used to detect the location of the intake camshaft. The engine ECU needs to know the position of the intake camshaft for variable intake camshaft position control, the camshaft position sensor provides this information. This pin connects to the camshaft position sensor located to the rear of the intake side of the engine head which outputs 3 pulse (reluctor pulses) per camshaft revolution.  
B74 11 IGT Ignition Trigger Cyl 1 & Cyl 6 Output This pin is used to control the ignition for cylinders 1 & 6. The ignition timing is electronically controlled by the engine ECU. This pin is connected to +5V inside the engine ECU as required to trigger engine ignition.  Ignition is  triggered on the high (+5V) to low (0V) transition.  
B74 12 IGT2 Ignition Trigger Cyl 5 & Cyl 2 Output This pin is used to control the ignition for cylinders 5 & 2. The ignition timing is electronically controlled by the engine ECU. This pin is connected to +5V inside the engine ECU as required to trigger engine ignition.  Ignition is  triggered on the high (+5V) to low (0V) transition.  
B74 13 IGT3 Ignition Trigger Cyl 3 & Cyl 4 Output This pin is used to control the ignition for cylinders 3 & 4. The ignition timing is electronically controlled by the engine ECU. This pin is connected to +5V inside the engine ECU as required to trigger engine ignition.  Ignition is  triggered on the high (+5V) to low (0V) transition.  
B74 14 / / / / / /  
B74 15 PMC Pressure Modulation Control (Wastegate) Vacuum Switching Valve Output This pin is used to control the VSV which controls the turbo wastegate on the front turbo.  This VSV allows the engine ECU to attempt to control boost pressure. The Wastegate Control Valve allows exhaust gas to pre-spool the rear turbocharger prior to it coming online as part of the sequential turbo system. This pin is connected to Ground inside the ECU as required to turn the Pressure Modulation Control valve which is more commonly called the wastegate control valve ON allowing pressurised intake air to be diverted away from the mechanical wastegate actuator.  When this VSV is ON the mechanical wastegate actuator will not operate and the wastegate will not open, this will result in a very large amount of boost pressure being generated by the turbochargers.  One side of the VSV should be wired to this pin and one side of VSV should be wired to battery voltage (Main EFI Relay switched).  
B74 16 / / / / / /  
B74 17 OCV- VVTi Solenoid Output This pin is used to control the solenoid that controls position of the intake camshaft. Controlling the position of the intake camshaft can be used to improve performance and fuel economy. This pin is used together with the OCV+ pin to power a solenoid that allows engine oil pressure to be used to vary the position of the intake camshaft.  The OCV+ and OCV- pins are triggered by the engine ECU in a PWM fashion.  
B74 18 OCV+ VVTi Solenoid Output This pin is used to control the solenoid that controls position of the intake camshaft. Controlling the position of the intake camshaft can be used to improve performance and fuel economy. This pin is used together with the OCV- pin to power a solenoid that allows engine oil pressure to be used to vary the position of the intake camshaft.  The OCV+ and OCV- pins are triggered by the engine ECU in a PWM fashion.  
B74 19 CL- ETCS-i  Clutch Output This pin is used to control the electronic throttle control clutch. The throttle is controlled by an electric motor that is controlled by the engine ECU however there is a clutch that is controlled by the engine ECU that must be engaged for the electric motor to be able to move the throttle.  If the engine ECU detects an issue with the ETCS-i system it will disable the clutch as a safety feature. This pin is used together with the CL+ pin to power the clutch that allows the electric motor to open and close engine throttle.  The ETCS-i clutch must be engaged for the electric motor to be able to open or close the throttle.  
B74 20 CL+ ETCS-i  Clutch Output This pin is used to control the electronic throttle control clutch. The throttle is controlled by an electric motor that is controlled by the engine ECU however there is a clutch that is controlled by the engine ECU that must be engaged for the electric motor to be able to move the throttle.  If the engine ECU detects an issue with the ETCS-i system it will disable the clutch as a safety feature. This pin is used together with the CL- pin to power the clutch that allows the electric motor to open and close engine throttle.  The ETCS-i clutch must be engaged for the electric motor to be able to open or close the throttle.  
B74 21 E01 ECU Ground Input Ground Used to supply a Ground path to allow current to flow. This pin connects to Ground or the battery negative via the Intake Manifold Rear Earth.  
B74 22 NE- Crankshaft & Intake Camshaft Position Sensor Ground Input This pin is used to provide a Ground to detect the speed and location of the engine crankshaft and intake camshaft. The engine ECU needs to know the position of the engine so that it can accurately provide fuel and ignition. This pin connects to the engine crankshaft position sensor and the intake camshaft position sensor.  
B74 23 NE+ Crankshaft Position Sensor Input This pin is used to detect the speed and location of the engine crankshaft. The engine ECU needs to know the position of the engine so that it can accurately provide fuel and ignition. This pin connects to the engine crankshaft position sensor located to the lower front of the exhaust side of the engine near the alternator which outputs 36-2 pulses (reluctor pulses) per engine crankshaft revolution.  
B74 24 NSW Neutral & Park Switch Input This pin is used to determine if the automatic transmission shifter is in the Park or Neutral positions. The engine ECU needs to energise/de-energise the automatic transmission solenoids to select the correct gear. This pin is connected to Ground by the automatic shifter position switch and the Starter Relay coil when the automatic transmission shifter is in the 'N' or 'P' positions.  In manual vehicles this pin is connected to the engine ECU STA pin.  
B74 25 IGF Igniter Verification Signal Input This is pin is used to detect if ignition has taken place successfully. If no ignition is occurring and fuel injection continues the spark plugs can be fouled and backfires can occur in the exhaust, the igniter sends a signal to inform the engine so that it can stop fuel injection if successful ignition is not detected. This pin is connected to Ground by the Igniter for a short period of time after a successful ignition event has been detected.  
B74 26 / / / / / /  
B74 27 KNK2 No.2 Knock Sensor (Rear) Input This pin is used to measure engine knock. Engine knock can occur if too much ignition timing and poor fuel are present, as engine knock can damage an engine the engine ECU used a knock sensor to detect and compensate for knock if is  detected. This pin connects to the signal output of the knock sensor which is mounted under the intake manifold, to the rear of the engine and screwed into the side of the engine block.  The knock sensor is Grounded via the engine block.  8.1kHz is the normal mode vibration.  
B74 28 KNK1 No.1 Knock Sensor (Front) Input This pin is used to measure engine knock. Engine knock can occur if too much ignition timing and poor fuel are present, as engine knock can damage an engine the engine ECU used a knock sensor to detect and compensate for knock if is  detected. This pin connects to the signal output of the knock sensor which is mounted under the intake manifold, to the front of the engine and screwed into the side of the engine block.  The knock sensor is Grounded via the engine block.  8.1kHz is the normal mode vibration.  
B74 29 LCKI Airconditioning Compressor Lock Sensor Input This pin is used to detect the speed of the airconditioning compressor. This speed sensor can be used to detect if the airconditioning compressor seizes or becomes disconnected, in which case the engine ECU will disable the airconditioning compressor to avoid further damage. This pin connects to the airconditioning compressor speed sensor located at the bottom of the airconditioning compressor.  The other side of the airconditioning compressor speed sensor should be connected to ground.  
B74 30 GEO1 ETCS-i Motor Shielding Output This pin is used to shield the wires used to control the electronic throttle control electric motor. Operation of the electronic throttle control electric motor can generate a significant amount of electrical noise, shielding of the wires has been used to reduce the amount of electrical noise that is transmitted into other systems. This pin is connected to ground inside the engine ECU and connects to the shield that covers the wires (M+ and M-) that are used to control the electronic throttle control electric motor.  
B74 31 E02 ECU Ground Input Ground Used to supply a Ground path to allow current to flow. This pin connects to Ground or the battery negative via the Intake Manifold Rear Earth.  
 
 
 
 
 
 
 
 
 
Plug Pin Symbol Definition Input / Output What Why How Link
B75 1 / / / / / /  
B75 2 VC Sensor Power Output This pin is used to supply +5V power to the throttle position sensor, accelerator pedal position sensor and the MAP sensor. The throttle position sensor, accelerator pedal position sensor and the MAP sensor require regulated and constant +5V to operate correctly. This pin outputs regulated +5V to the throttle position sensor, accelerator pedal position sensor and the MAP sensor.  
B75 3 VSV2 Exhaust Gas Control Valve Vacuum Switching Valve Output This pin is used to control the VSV which is used to open / close the Exhaust Gas Control Valve that is a component of the sequential turbo system. The Exhaust Gas Control Valve allows exhaust gas to exit the rear turbocharger allowing it to fully come online as part of the sequential turbo system. This pin is connected to Ground inside the ECU as required to turn the Exhaust Gas Control Valve VSV ON allowing pressurised intake air to open the Exhaust Gas Control Valve.  One side of the VSV should be wired to this pin and one side of VSV should be wired to battery voltage (Main EFI Relay switched).  
B75 4 HT Oxygen Sensor Heater Output This pin is used to control the heater for the exhaust gas oxygen sensor. The oxygen sensor requires a certain temperature to start operating, to allow this temperature to be reached quickly and allow the oxygen sensor to start operation the sensor is heated. This pin connects to Ground inside the engine ECU as required to turn the oxygen sensor heater on.  One side of the oxygen sensor heater should be wired to this pin and one side of oxygen sensor heater should be wired to battery voltage (Main EFI Relay switched).  
B75 5 #10 Cyl 1 Injector Driver Output This pin is used to control the No.1 fuel injector. The fuel injectors are electronically controlled by the engine ECU. This pin is connected to Ground inside the ECU as required to turn the fuel injector ON.  The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.  
B75 6 #20 Cyl 2 Injector Driver Output This pin is used to control the No.2 fuel injector. The fuel injectors are electronically controlled by the engine ECU. This pin is connected to Ground inside the ECU as required to turn the fuel injector ON.  The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.  
B75 7 PRG Evaporative Emission Control Vacuum Switching Valve Output This pin is used to control the VSV which is used to allow fuel vapour from the charcoal canister to enter the intake manifold and enter the engine. Fuel vapours from the fuel tank are captured in the charcoal canister to protect the environment, the PRG VSV is used to allow these captured emissions to be burnt during normal engine operation as determined by the engine ECU. This pin is connected to Ground inside the ECU as required to turn the Evaporative Emissions Control Valve VSV ON allowing fuel emissions to pass to the intake manifold into the engine.  One side of the VSV should be wired to this pin and one side of VSV should be wired to battery voltage (Main EFI Relay switched).  
B75 8 MOPS Main Oil Pressure Switch Input This pin is used to sense low engine oil pressure. The engine ECU can vary some engine parameters if it detects low oil pressure. This pin connects to a pressure switch that is installed at the oil filter assembly on the lower, intake side of the engine to measure engine oil pressure.  The oil pressure switch is grounded via the engine block.  
B75 9 PIM Pressure Intake Manifold (MAP Sensor) Input This pin is used to determine the manifold air pressure (MAP). Manifold air pressure is used for control of the sequential turbo system as well as boost cut. This pin connects to the signal output of the MAP sensor which contains a small sensor to measure air pressure.  A small vacuum hose connects the MAP sensor to the intake after the throttle body.  
B75 10 VG Engine Airflow Input This pin is used to determine the engine airflow. Engine airflow is a primary component in the fuel injection control algorithm.  If the engine airflow is known then the amount of fuel required to achieve a desired air fuel ratio can be calculated by the engine ECU. This pin connects to the signal output of the airflow sensor.  The airflow sensor is located in the engine intake piping just after the airfilter.  
B75 11 / / / / / /  
B75 12 OX Oxygen Sensor Input This pin is used to determine the exhaust gas air fuel ratio. The engine ECU will aim for an air fuel ratio near stoichiometric (neither rich or lean) to enhance fuel economy under periods of low load. This pin connects to the signal output of the oxygen sensor that is mounted in the exhaust.  The factory oxygen sensor is a 'narrow band' oxygen sensor that outputs approximately 0V when the air fuel ratio is lean and approximately 1V when the air fuel ratio is rich.  The engine ECU will aim to keep the engine running at stoichiometric by alternating between very slightly rich and very slightly lean conditions, as the sensor is only a narrow band sensor this is a practical way to achieve (or very close to) the desired stoichiometric air fuel ratio.  
B75 13 N Automatic Transmission Neutral Gear Position Indicator Input This pin is used to determine if the automatic transmission shifter is in the Neutral position.
The engine ECU needs to energise/de-energise the automatic transmission solenoids to select the correct gear. This pin is connected to battery voltage by the automatic shifter position switch when the automatic transmission shifter is in the 'N' position.  
B75 14 THW Water Temperature Sensor Input This pin is used to measure the temperature of the engine coolant exiting the engine. The engine coolant temperature has a significant effect on the engines operation, for example requiring more fuel during 'warm up' conditions.
This pin connects to a thermistor that is installed at the engine coolant water outlet to the radiator on the front, upper, exhaust side of the engine to measure engine coolant temperature.  One side of the thermistor should be wired to this pin and one side of the thermistor should be wired to the engine ECU pin E2 (Ground).  
B75 15 VPA

Accelerator Pedal Position Sensor

 

 

Input This pin is used to effectively detect the position of the accelerator pedal which reflects the operators desired throttle position. The operators desired throttle position is a useful parameter for engine operation, particularly in transient conditions such as acceleration. This pin measures the variable voltage from one of the outputs from the position sensor that measures how depressed the accelerator pedal is.  The position sensor has two outputs (VPA and VPA2) with different responses that allow the engine ECU to perform diagnostics during normal operation.  
B75 16 VPA2 Accelerator Sensor (Demand Position Sensor) Input This pin is used to effectively detect the position of the accelerator pedal which reflects the operators desired throttle position. The operators desired throttle position is a useful parameter for engine operation, particularly in transient conditions such as acceleration. This pin measures the variable voltage from one of the outputs from the position sensor that measures how depressed the accelerator pedal is.  The position sensor has two outputs (VPA and VPA2) with different responses that allow the engine ECU to perform diagnostics during normal operation.  
B75 17 E1 ECU Ground Input Ground. Used to supply a Ground path to allow current to flow. This pin connects to Ground or the battery negative via the Intake Manifold Rear Earth.  
B75 18 E2 Sensor Ground Output Sensor ground. The throttle position, airflow, air and water temperature and MAP sensors have a separate ground to ensure clear signals. This pin is connected to sensor Ground inside the engine ECU.  Do not connect this pin to chassis Ground.  
B75 19 EVG Airflow Meter Ground Input Airflow meter signal ground. The airflow meter sensor has a separate signal ground to ensure a clear signal. This pin is connected to sensor Ground inside the engine ECU.  Do not connect this pin to chassis Ground.  
B75 20 2 Automatic Transmission 2nd Gear Position Indicator Input This pin is used to determine if the automatic transmission shifter is in the 2nd position.
The engine ECU needs to energise/de-energise the automatic transmission solenoids to select the correct gear. This pin is connected to battery voltage by the automatic shifter position switch when the automatic transmission shifter is in the '2' position.  
B75 21 L Automatic Transmission 1st Gear Position Indicator Input This pin is used to determine if the automatic transmission shifter is in the L position. The engine ECU needs to energise/de-energise the automatic transmission solenoids to select the correct gear. This pin is connected to battery voltage by the automatic shifter position switch when the automatic transmission shifter is in the 'L' position.  
B75 22 THA Air Temperature Sensor Input This pin is used to measure the temperature of the engine intake air. The engine air temperature has an effect on the air density so should be measured so the correct air density can be calculated. This pin connects to a thermistor that is installed in the airflow sensor The airflow sensor is located in the engine intake piping just after the airfilter.  
B75 23 VTA Throttle Position Sensor
Input This pin is used to detect the actual position of the throttle. The actual throttle position allows the engine ECU to set the throttle to a know position based on the desired throttle position and the engine ECUs desired programming. This pin measures the variable voltage from one of the outputs from the position sensor that measures the actual throttle position.  The position sensor has two outputs (VTA and VTA2) with different responses that allow the engine ECU to perform diagnostics during normal operation.  
B75 24 VTA2 Throttle Position Sensor (Actual Throttle Position Sensor) Input This pin is used to detect the actual position of the throttle. The actual throttle position allows the engine ECU to set the throttle to a know position based on the desired throttle position and the engine ECUs desired programming. This pin measures the variable voltage from one of the outputs from the position sensor that measures the actual throttle position.  The position sensor has two outputs (VTA and VTA2) with different responses that allow the engine ECU to perform diagnostics during normal operation.  
 
 
 
 
 
 
 
 
 
Plug Pin Symbol Definition Input / Output What Why How Link
B76 1 S1 Automatic Transmission No.1 Shift Solenoid Output This pin is used to control the automatic transmission No.1 shift solenoid. The automatic transmission gear selection is controlled by electronic solenoids. This pin outputs battery voltage to turn the No.1 shift solenoid ON as required.  The No.1 shift solenoid is ON in gears 1 & 2.  The other side of the No.1 shift solenoid is Grounded inside the automatic transmission.  
B76 2 S2 Automatic Transmission No.2 Shift Solenoid Output This pin is used to control the automatic transmission No.2 shift solenoid. The automatic transmission gear selection is controlled by electronic solenoids. This pin outputs battery voltage to turn the No.2 shift solenoid ON as required .  The No.2 shift solenoid is ON in gears 2 & 3.  The other side of the No.2 shift solenoid is Grounded inside the automatic transmission.  
B76 3 S3 Automatic Transmission Shift Solenoid Output ? ? ?  
B76 4 NCO+ Automatic Transmission Over Drive Direct Clutch Speed Sensor Input This pin is used to detect the speed of the automatic transmission O/D input shaft. Detection of the automatic transmission OD input shaft speed can be used to improve shift timing and ensure smooth gear shifts. This pin connects to the OD speed sensor located on the left, front side of the automatic transmission and outputs a number of pulses (reluctor pulses) per revolution of the OD direct clutch drum.  
B76 5 SP2+ Speed Sensor Input This pin is used to determine vehicle speed. Vehicle speed is used in idle control, automatic transmission shift control,  speed limiting etc.
This pin connects to the speed sensor located on the left, rear side of the automatic transmission and outputs 12 pulses (reluctor pulses) per revolution of the automatic transmission output shaft.  
B76 6 S4 Automatic Transmission Shift Solenoid Output ? ? ?  
B76 7 SLU+ Automatic Transmission Lock Up Solenoid Output This pin is used to control the automatic transmission lock up torque converter control solenoid which is used to enable torque converter lock up. The automatic transmission lock up torque converter is controlled by an electronic solenoid. This pin in association with the SLU- pin outputs battery voltage to turn the lock up torque converter solenoid ON.  
B76 8 SLN+ Automatic Transmission Accumulator Back Pressure Solenoid Output This pin is used to control the automatic transmission accumulator back pressure control solenoid. The automatic transmission accumulator back pressure is controlled by an electronic solenoid. This pin in association with the SLN- pin outputs Pulse Width Modulated (PWM) battery voltage to turn the accumulator back pressure control solenoid ON.  
B76 9 SLT+ Automatic Transmission Line Pressure Control Solenoid Output This pin is used to control the automatic transmission line pressure control solenoid. The automatic transmission line pressure is controlled by an electronic solenoid. This pin in association with the SLT- pin outputs Pulse Width Modulated (PWM) battery voltage to turn the line pressure control solenoid ON.  
B76 10 NCO- Automatic Transmission Over Drive Direct Clutch Speed Sensor Input This pin is used to detect the speed of the automatic transmission O/D input shaft. Detection of the automatic transmission OD input shaft speed can be used to improve shift timing and ensure smooth gear shifts. This pin connects to the OD speed sensor located on the left, front side of the automatic transmission and outputs a number of pulses (reluctor pulses) per revolution of the OD direct clutch drum.  
B76 11 SP2- Speed Sensor Input This pin is used to determine vehicle speed. Vehicle speed is used in idle control, automatic transmission shift control, speed limiting etc.
This pin connects to the speed sensor located on the left, rear side of the automatic transmission and outputs 12 pulses (reluctor pulses) per revolution of the automatic transmission output shaft.  
B76 12 VSV3 Exhaust Bypass Valve Vacuum Switching Valve Output This pin is used to control the VSV which is used to open / close the Exhaust Bypass Valve that is a component of the sequential turbo system. The Exhaust Bypass Valve allows exhaust gas to pre-spool the rear turbocharger prior to it coming online as part of the sequential turbo system. This pin is connected to Ground inside the ECU as required to turn the Exhaust Bypass Valve VSV ON allowing pressurised intake air to open the Exhaust Bypass Valve.  One side of the VSV should be wired to this pin and one side of VSV should be wired to battery voltage (Main EFI Relay switched).  
B76 13 SLU- Automatic Transmission Lock Up Solenoid Output This pin is used to control the automatic transmission lock up torque converter control solenoid which is used to enable torque converter lock up. The automatic transmission lock up torque converter is controlled by an electronic solenoid. This pin in association with the SLU+ pin outputs battery voltage to turn the lock up torque converter solenoid ON.  
B76 14 SLN- Automatic Transmission Accumulator Back Pressure Solenoid Output This pin is used to control the automatic transmission accumulator back pressure control solenoid. The automatic transmission accumulator back pressure is controlled by an electronic solenoid. This pin in association with the SLN+ pin outputs Pulse Width Modulated (PWM) battery voltage to turn the accumulator back pressure control solenoid ON.  
B76 15 SLT- Automatic Transmission Line Pressure Control Solenoid Output This pin is used to control the automatic transmission line pressure control solenoid. The automatic transmission line pressure is controlled by an electronic solenoid. This pin in association with the SLT+ pin outputs Pulse Width Modulated (PWM) battery voltage to turn the line pressure control solenoid ON.  
B76 16 FPU Fuel Pressure Up Vacuum Switching Valve Output This pin is used to control the VSV which is used to increase fuel pressure during hot soak starting. To reduce the possibility of fuel vapour formation in the fuel rail during starting from hot soak conditions the Fuel Pressure Up VSV is used to increase the fuel rail pressure for a short period of time after hot soak starting. This pin is connected to Ground inside the ECU as required to turn the Fuel Pressure Up VSV ON which vents the fuel pressure regulator reference to atmosphere resulting in increased fuel rail pressure.  One side of the VSV should be wired to this pin and one side of VSV should be wired to battery voltage (Main EFI Relay switched).  
B76 17 OIL Automatic Transmission Oil Temperature Sensor Input This pin is used to measure the automatic transmission oil temperature. The automatic transmission oil temperature has a significant effect on the automatic transmissions operation, the engine ECU can compensate if the automatic transmission oil temperature is measured. This pin connects to a thermistor that is installed inside the automatic transmission to measure the automatic transmission oil temperature.  One side of the thermistor should be wired to this pin and one side of the thermistor should be wired to the engine ECU pin E2 (Ground).  
 
 
 
 
 
 
 
 
 
Plug Pin Symbol Definition Input / Output What Why How Link
B77 1 AC Air Conditioning (AC) Request Signal Input This pin is used to request that the AC be turned ON. Having an AC request input and a separate control output allows the engine ECU to turn the AC OFF under some conditions, such as hard acceleration. This pin is connected to Ground to request that the AC be turned ON.  The AC request signal is generated by the climate control ECU, however connecting this pin to Ground will not guarantee that the AC is turned ON.  
B77 2 STA Starter Signal Input This pin is used to determine if the engine is being cranked. The engine ECU can take action to allow the engine to start easier if it is aware that the engine is trying to be started. This pin is connected to battery voltage when the ignition switch is in CRANK position.  
B77 3 / / / / / /  
B77 4 SFTU Automatic Transmission Shift Up Input This pin is used to detect the drivers request to shift the automatic transmission up a gear from the steering wheel controls, when the automatic transmission shifter is in the 'M' position.
Driver control of the automatic transmission. This pin is connected to ground when the switch to shift the automatic transmission up a gear is activated, the ECU pin is open circuit when the switch is not activated.  
B77 5 TC Test Connector Input This pin is used to select the test mode during which diagnostic codes are flashed on the check engine light. Used to help in diagnosing issues. This pin is connected to Ground to enable test mode.  
B77 6 STP Stop Light Switch Input This pin is used to detect when the brake pedal is depressed. Used to disable the automatic transmission lock up torque converter, exit deceleration fuel cut, etc. This pin is connected to battery voltage when the brake pedal is depressed, the ECU pin is open circuit when the brake pedal is not depressed.  
B77 7 3 Automatic Transmission M (Manual) Gear Position Indicator Input This pin is used to determine if the automatic transmission shifter is in the 'M' (Manual) position. In the Manual position the automatic transmission gear position is controlled by the engine ECU pins SFTU and SFTD. The engine ECU needs to energise/de-energise the automatic transmission solenoids to select the correct gear. This pin is connected to battery voltage by the automatic shifter position switch when the automatic transmission shifter is in the 'M' position.  
B77 8 / / / / / /  
B77 9 / / / / / /  
B77 10 / / / / / /  
B77 11 / / / / / /  
B77 12 / / / / / /  
B77 13 ACMG Airconditioning Magnetic Clutch Relay Trigger Output This pin is used to turn the airconditioning magnetic clutch relay ON. ECU control of the airconditiong enables the airconditioning to be turned off during hard acceleration, etc. This pin is Grounded by the ECU as required to turn the airconditioning magnetic clutch relay ON.  One side of the airconditioning magnetic clutch relay coil should be wired to this pin and one side of the airconditioning magnetic clutch relay coil should be connected to battery voltage (Ignition switched) and one side of the relay coil connected to this ECU pin.  
B77 14 SFTD Automatic Transmission Shift Down Input This pin is used to detect the drivers request to shift the automatic transmission down a gear from the steering wheel controls, when the automatic transmission shifter is in the 'M' position.
Driver control of the automatic transmission. This pin is connected to ground when the switch to shift the automatic transmission down a gear is activated, the ECU pin is open circuit when the switch is not activated.  
B77 15 / / / / / /  
B77 16 R Automatic Transmission Reverse Gear Position Indicator Input This pin is used to determine if the automatic transmission shifter is in the reverse position.
The engine ECU needs to energise/de-energise the automatic transmission solenoids to select the correct gear. This pin is connected to battery voltage by the automatic shifter position switch when the automatic transmission shifter is in the 'R' position.  
B77 17 D Automatic Transmission Drive Gear Position Indicator Input This pin is used to determine if the automatic transmission shifter is in the drive position. The engine ECU needs to energise/de-energise the automatic transmission solenoids to select the correct gear. This pin is connected to battery voltage by the automatic shifter position switch when the automatic transmission shifter is in the 'D' position.  
B77 18 RRO Rear Right Wheel Speed Input This pin is used to receive the right, rear wheel speed. Wheel speed is used in operation of the traction control system. This pin connects to the ABS ECU which outputs a slaved Pulse Width Modulated (PWM) signal related to wheel RPM.  
B77 19 RLO Rear Left Wheel Speed Input This pin is used to receive the left, rear wheel speed. Wheel speed is used in operation of the traction control system. This pin connects to the ABS ECU which outputs a slaved Pulse Width Modulated (PWM) signal related to wheel RPM.  
B77 20 TACH Tachometer Output This pin is used to output a PWM signal that correlates to engine RPM. Engine RPM is displayed on the dash and also available at the diagnostic connector mounted on the side of the engine. This pin outputs a square wave, 0V to battery voltage waveform. The frequency of which is related to engine RPM.
 
B77 21 ABS ABS Activated? Input? It is suspected that this pin is used to determine when the ABS is active and retard engine timing. Reduced ignition time will reduce engine power which is used by the ABS to attempt to maintain braking traction. This pin is connected to the ABS control ECU EXO pin, which it is suspected is connected to ground when the ABS system is activated.  
B77 22 / / / / / /  
B77 23 / / / / / /  
B77 24 / / / / / /  
B77 25 SPD No.1 Speed Sensor (Manual Transmission).

No.1 Speed Signal (Automatic Transmission).

Input (Manual Transmission),

Output (Automatic Transmission)
This pin is used to determine vehicle speed. (Manual Transmission).

This pin is used to provide the vehicle speed signal to the dash (Automatic Transmission).
Vehicle speed is used in idle control, automatic transmission, speed limiting etc (Manual Transmission).

Vehicle speed is outputted so that it can be displayed on the combination meter (Automatic Transmission).
This pin is connected to the combination meter speed output which outputs 4 pulses (Open collector square wave pulses) per manual gearbox mounted speed sensor shaft revolution.  The combination meter receives its speed signal from the speed sensor which is located on the right, rear side of the manual transmission and outputs 4 pulses (0 to Battery Voltage square wave pulses) per sensor shaft revolution. (Manual Transmission).

This pin generates a signal that is equivalent to the gearbox mounted speed sensor in a manual transmission equipped vehicle.  In an automatic transmission equipped vehicle there is no dedicated speed sensor for the combination meter, to allow the combination meter to function the required speed signal is generated by the engine ECU to simulate the not fitted, dedicated speed sensor.  The engine ECU outputs 4 pulses (0 to Battery Voltage square wave pulses) per tail shaft revolution.  (Automatic Transmission).
 
B77 26 ELS Electrical Load Sense Input This pin is used to signal that heavy electrical loads are ON (e.g. rear demister). Heavy electrical loads place more load on the alternator and hence the engine, the engine ECU can adjust for these heavy electrical loads if it is aware of them. This pin is connected to battery voltage when a heavy electrical load is ON.  
B77 27 RSPD Road Speed Signal? Output This pin is used to transmit a vehicle speed related signal to the shift lock control ECU. The shift lock control ECU can prevent the shifting from the automatic transmission Park position under certain circumstances. It is suspected that this pin outputs a high value when the vehicle is moving.  It is suspected that this will enable the operator to select a gear without depressing the brake pedal if the transmission is placed into Park while the vehicle is moving.  
B77 28 / / / / / /  
 
 
 
 
 
 
 
 
 
Plug Pin Symbol Definition Input / Output What Why How Link
B78 1 BATT Battery Power Input This pin is used to supply constant battery power to the ECU. Constant battery power allows the engine ECU to retain error codes, fuel trims, etc. This pin is connected to battery voltage at all times via the 25A EFI fuse.  
B78 2 SNOW Traction Control SNOW Mode Indication Light Output This pin is used to turn ON / OFF the SNOW mode indication light. The SNOW mode indication light comes on to indicate that SNOW mode for the traction control has been selected. This pin is Grounded by the ECU as required to turn the SNOW indication light ON.  The SNOW indication light should be wired with one side of the light connected to battery voltage (Ignition Switched) and one side of the light connected to this ECU pin.  Light ON = SNOW mode selected, light OFF = Normal.  
B78 3 SNWI Traction Control SNOW Mode Select Switch Input This pin is used to enable / disable traction control SNOW mode. In conditions such as snow the traction control settings can be changed to limit torque / wheel spin. This pin is Grounded by the SNOW mode select switch by the operator to select SNOW mode for the automatic transmission.  
B78 4 DI Diagnostic Indication (Fuel Pump Control) Input This pin is used to determine if the Fuel Pump ECU is healthy. This pin lets the engine ECU know if the Fuel Pump ECU is healthy, if the Fuel Pump ECU is not healthy the engine ECU stops the output on the FPC pin. This pin is connected to battery voltage when the Fuel Pump ECU is healthy, the pin is open circuit when Fuel Pump ECU is not healthy.  
B78 5 FPC Fuel Pump Control Output This pin is used to signal the desired fuel pump speed to the Fuel Pump ECU. The fuel pump speed can be reduced at low load conditions to make the fuel quieter and improve fuel pump longevity. This pin outputs a 0V to 5V Pulse Width Modulated (PWM) signal which is connected to the Fuel Pump ECU to control fuel pump speed.  
B78 6 W Engine Warning Light (Check Engine Light) Output This pin is used to turn ON / OFF the check engine light. The check engine light comes on to inform of a detected engine issue. This pin is Grounded by the ECU as required to turn the Check Engine Light ON.  The check engine light should be wired with one side of the light connected to battery voltage (Ignition Switched) and one side of the light connected to this ECU pin.  Light ON = Error Condition, light OFF = Normal.  
B78 7 +BM ETCS-i Power Input This pin is used to supply constant battery power to the ECU for the electronic throttle control system. Used to supply power for the electronic throttle control system. This pin is connected to battery voltage at all times via the 15A ETCS fuse.  
B78 8 +B2 EFI Main Relay Switched Power Input This pin is used to supply switched battery power to the ECU. Used to supply power. This pin is connected to battery voltage when the Main EFI Relay is energised to supply power to the ECU.  The Main EFI Relay is triggered by the engine ECU pin M-REL pin.   
B78 9 IGSW Ignition Switch Input This pin is used to determine if the ignition is ON. The engine ECU is turned on by this signal. This pin is connected to battery voltage when the ignition switch is in RUN and CRANK positions.  
B78 10 M-REL EFI Main Relay Trigger Output This pin is used to turn ON the Main EFI Relay which feeds power to the fuel pump, engine ECU, engine VSVs and O2 sensor heater circuits, etc. ECU control of the main power relay allows the ECU to remain powered up after engine shutdown. This pin is connected to battery voltage inside the ECU as required to turn the Main EFI Relay ON when the ignition switch is ON.  Note that this pin continues to output voltage for a few second after the ignition has been switched off to allow the ISCV to be fully opened by the ECU for the next engine start.  One side of the Main EFI Relay coil should be connected to this pin and one side of the Main EFI Relay coil should be connected to Ground.  
B78 11 SIL OBDII Output This pin is used to provide OBDII diagnostic information. Many engine parameters can be monitored via the OBDII interface, which maybe particularly helpful in diagnosing issues that maybe present in the engine control system. The ISO 9141-2 K-Line standard is used to provide OBDII information via serial.  
B78 12 / / / / / /  
B78 13 / / / / / /  
B78 14 / / / / / /  
B78 15 / / / / / /  
B78 16 +B Switched Battery Power Input This pin is used to supply switched battery power to the ECU. Used to supply power. This pin is connected to battery voltage when the Main EFI Relay is energized to supply power to the ECU.  The Main EFI Relay is triggered by the engine ECU pin M-REL pin.   
B78 17 / / / / / /  
B78 18 / / / / / /  
B78 19 / / / / / /  
B78 20 / / / / / /  
B78 21 / / / / / /  
B78 22 EC PRE and PRE2 Switches Ground Input Ground. Used to supply a Ground path to allow current to flow.  It is believed that a separate ground is used for the PRE and PRE2 switch inputs due to the location of the PRE and PRE2 switches. This pin connects to Ground or the battery negative.  
 
 
 
 
 
 
 
 
 
Plug Pin Symbol Definition Input / Output What Why How Link
B79 1 IND Traction Control Enable / Disabled Indication Light Output This pin is used to turn On / Off the traction control off, indication light. The traction control off, indication light comes on to indicate that traction control has been disabled. This pin is Grounded by the ECU as required to turn the traction control off indication light ON.  The traction control off, indication light should be wired with one side of the light connected to battery voltage (Ignition Switched) and one side of the light connected to this ECU pin.  Light ON = Traction control disabled, light OFF = Normal.  
B79 2 MSW Traction Control OFF Switch Input This pin is used to enable / disable traction control. The operator may choose to disable traction control. This pin is Grounded by the traction control OFF switch by the operator to disable traction control.  
B79 3 LPO1 Automatic Transmission Combination Meter LCD Output?

It is believe that this pin is used to transmit information from the engine ECU for display on the small LCD screen built into the tachometer.

The LCD displays information such as current automatic transmission gear. Exactly operation of this pin is currently unknown.  
B79 4 LPO2 Automatic Transmission Combination Meter LCD Output? It is believe that this pin is used to transmit information from the engine ECU for display on the small LCD screen built into the tachometer. The LCD displays information such as current automatic transmission gear. Exactly operation of this pin is currently unknown.  
B79 5 / / / / / /  
B79 6 / / / / / /  
B79 7 FRO Front Right Wheel Speed Input This pin is used to receive the right, front wheel speed. Wheel speed is used in operation of the traction control system. This pin connects to the ABS ECU which outputs a slaved Pulse Width Modulated (PWM) signal related to wheel RPM.  
B79 8 FLO Front Left Wheel Speed Input This pin is used to receive the left, front wheel speed. Wheel speed is used in operation of the traction control system. This pin connects to the ABS ECU which outputs a slaved Pulse Width Modulated (PWM) signal related to wheel RPM.  
B79 9 / / / / / /  
B79 10 / / / / / /  
B79 11 / / / / / /  
B79 12 / / / / / /  
B79 13 / / / / / /  
B79 14 CIND Traction Control Active Indication Light Output This pin is used to turn On / Off the traction control active indication light. The traction control active indication light comes on to indicate that traction control is active, that is the traction control system is attempting to prevent the loss of traction. This pin is Grounded by the ECU as required to turn the traction control active indication light ON.  The traction control active indication light should be wired with one side of the light connected to battery voltage (Ignition Switched) and one side of the light connected to this ECU pin.  Light ON = Traction control active, light OFF = Normal.  
B79 15 / / / / / /  
B79 16 / / / / / /  
B79 17 LPO3 Automatic Transmission Combination Meter LCD Output? It is believe that this pin is used to transmit information from the engine ECU for display on the small LCD screen built into the tachometer. The LCD displays information such as current automatic transmission gear. Exactly operation of this pin is currently unknown.  
B79 18 SPTL Automatic Transmission Combination Meter LCD Output? It is believe that this pin is used to transmit information from the engine ECU for display on the small LCD screen built into the tachometer. The LCD displays information such as current automatic transmission gear. Exactly operation of this pin is currently unknown.  
B79 19 BZ Reverse Buzzer Output This pin is used to turn On / Off the reversing buzzer. The reversing buzzer is used to provide audible indication that reverse gear has been selected on the automatic transmission This pin is connected to battery voltage within the engine ECU to turn the buzzer located in the combination meter on.  Buzzer ON = Reverse gear selected, Buzzer OFF = Reverse gear not selected.  
B79 20 / / / / / /  
B79 21 / / / / / /  
B79 22 / / / / / /  
B79 23 / / / / / /  
B79 24 / / / / / /  
B79 25 / / / / / /  
B79 26 / / / / / /  

 

JZA80 Toyota Supra 2JZ-GTE VVTi Engine Loom to Body Loom Pinout

 

JZA80 Toyota Supra 2JZ-GTE VVTi 90980-11555 Engine Loom to Body Loom Plug (Orange) [BG1]

This plug is located inside the passenger foot well and mates with male connector 90980-11554. (BG1).

Note: Blue text indicates pins related to automatic transmission functions only.

Pin Symbol Definition Input / Output
(To engine = Input)
(From engine = Output)
Description
1   Neutral Gear Automatic Transmission Position Switch Indicator Output

The body loom side of this pin connects to the dash to indicate when Neutral has been selected by the automatic transmission shifter.

The engine loom side of this pin connects to automatic transmission shifter position switch mounted on the automatic transmission and outputs battery voltage when the automatic transmission shifter is in the Neutral position.

 

2 Speed Sensor: SI No.1 Speed Sensor: Output Signal Output

The body loom side of this pin needs to be connected to the speedometer located in the dash.

The engine loom side of this pin connects to the transmission No.1 (3 wires) speed sensor signal output pin.

The engine loom side of this pin connects to the engine ECU SP1 pin.

3 Engine ECU: SNOW
Snow Mode Indication Light
Output
The body loom side of this pin connects to the snow mode indication light located in the dash.

The engine loom side of this pin connects to the engine ECU SNWO pin.
4 Proportional Power Steering (PPS) ECU: SOL+ Proportional Power Steering Solenoid Input The body loom side of this pin connects to the proportional power steering ECU SOL+ pin.

The engine loom side of this pin connects to the proportional power steering solenoid (Pin 1) located on the drivers side of the power steering rack.
5 Engine ECU: BZ Reverse Buzzer
Output The body loom side of this pin connects to the reverse buzzer located in the dash.

The engine loom side of this pin connects to the engine ECU BZ pin.
6  /  /  /  /
7   Park Gear Automatic Transmission Position Switch Indicator Output

The body loom side of this pin connects to the dash to indicate when Park has been selected by the automatic transmission shifter.

The engine loom side of this pin connects to automatic transmission shifter position switch mounted on the automatic transmission and outputs battery voltage when the automatic transmission shifter is in the Park position.

 

8 Speed Sensor: SE No.1 Speed Sensor: Ground Input The body loom side of this pin needs to be connected Ground.  In factory wiring this pin connects to the dash and the dash connects the speed sensor Ground pin (and other dash items) to Ground, however this wiring can be simplified in engine transplant situations.

The engine loom side of this pin connects to the transmission No.1 (3 wire) speed sensor Ground pin.
9 Engine ECU: IND
Traction Control Enable / Disabled Indication Light Output
The body loom side of this pin connects to the traction control off, indication light located in the dash.

The engine loom side of this pin connects to the engine ECU IND pin.
10 Air Conditioning ECU: A/CI AC Magnetic Clutch Status Output The body loom side of this pin connects to the AC amplifier A/CI pin.

The engine loom side of this pin connects to the AC magnetic clutch relay output.  The AC magnetic clutch  is grounded via the engine block. 
11 Engine ECU: SP1 Dash: Speed Sensor Output (from No.1 Speed Sensor)

Input (Manual Transmission),

 

Not Connected (Automatic Transmission)

The body loom side of this pin needs to be connected to the dash speedometer output.

The engine loom side of this pin connects to the engine ECU SP1 terminal (Manual Transmission).

The engine loom side of this pin is not connected (Automatic Transmission).

12 Engine Mounted Diagnostic Connector: AB SRS Airbag Power Input The body loom side of this pin connects to the SRS airbag control ECU 'LA' pin.

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine.
13 Engine ECU: IGSW Ignition Switched Power Input The body loom side of this pin needs to be connected to an ignition switched power source that supplies battery voltage when the ignition is in the RUN and CRANK Positions.

The engine loom side of this pin connects to the engine ECU IGSW pin.
14 Proportional Power Steering (PSS) ECU: SOL- Proportional Power Steering Solenoid Input The body loom side of this pin connects to the proportional power steering ECU SOL- pin.

The engine loom side of this pin connects to the proportional power steering solenoid (Pin 2) located on the drivers side of the power steering rack.
15 Engine ECU: W

Engine Mounted Diagnostic Connector: W
Check Engine Light
Output The body loom side of this pin needs to be connected to the check engine light located in the dash.

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine W pin and the engine ECU W pin.
16 Engine ECU: PIM
Pressure Intake Manifold (MAP Sensor)
Output
The body loom side of this pin needs to be connected to the boost gauge located in the dash.

The engine loom side of this pin connects to the engine ECU PIM pin.
17 Engine ECU: 2 2nd Gear Automatic Transmission Position Switch Indicator Output

The body loom side of this pin connects to the dash to indicate when 2  has been selected by the automatic transmission shifter.

The engine loom side of this pin connects to automatic transmission shifter position switch mounted on the automatic transmission and outputs battery voltage when the automatic transmission shifter is in the 2 position, this pin also connects to the engine ECU 2 pin.

 

18  /  /  /  /
19   Engine Coolant Temperature Dash Sensor Output The body loom side of this pin needs to be connected to the coolant temperature gauge located in the dash.

The engine loom side of this pin connects to the one wire engine coolant temperature sensor located at the engine coolant water outlet to the radiator on the front, upper, exhaust side of the engine.
20 Air Conditioning ECU: SG
Air Conditioning Compressor Speed Sensor Input The body loom side of this pin connects to the AC amplifier SG pin.

The engine loom side of this pin connects to the AC compressor speed sensor.
21

Engine ECU: TC

 

Engine Mounted Diagnostic Connector: TC

Test Connector Input

The body loom side of this pin connects to the 'TC' pin on the engine ECU via the GC2-11 and BC2-7 plugs.

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine.

 

Refer to pin BC2-7 for further information.

 

22 Engine ECU: LPO1
Automatic Transmission Positon Switch Indication?
Output? The body loom side of this pin connects to the dash.

The engine loom side of this pin connects to the engine ECU LPO1 pin.
23   Ignition Switched Power Input

The body loom side of this pin needs to be connected to an ignition switched power source that supplies battery voltage when the ignition is in the RUN and CRANK Positions.

The engine loom side of this pin connects switched battery voltage to the alternator, automatic transmission position switch, manual transmission reverse position switch and the manual transmission No.1 (3 wire) speed sensor.

 

24   Dash Water Temperature Gauge Ground Input The body loom side of this pin connects to the dash for the water temperature sensor gauge Ground.

The engine loom side of this pin connects to the engine Ground point.
25   Low Oil Pressure Switch Output The body loom side of this pin needs to be connected to the low oil pressure light located in the dash.

The engine loom side of this pin connects to the low oil pressure switch located on the front, lower, intake side of the engine.
26 Air Conditioning ECU: SSR Air Conditioning Compressor Speed Sensor Output The body loom side of this pin connects to the AC amplifier SSR pin.

The engine loom side of this pin connects to the AC compressor speed sensor.
27 Engine ECU: L Low Gear Automatic Transmission Position Switch Indicator Output

The body loom side of this pin connects to the dash to indicate when L has been selected by the automatic transmission shifter.

The engine loom side of this pin connects to automatic transmission shifter position switch mounted on the automatic transmission and outputs battery voltage when the automatic transmission shifter is in the L position, this pin also connects to the engine ECU L pin.

 

28 Engine ECU: SPTL
Automatic Transmission Position Switch Indication?
Output? The body loom side of this pin connects to the dash.

The engine loom side of this pin connects to the engine ECU SPTL pin.
29

Engine ECU: TACH

 

Engine Mounted Diagnostic Connector: IG-

Tachometer Output from Igniter Output The body loom side of this pin needs to be connected to the dash tachometer.

The engine loom side of this pin connects to the engine ECU TACH pin.
30 Engine ECU: 3
Automatic Transmission M (Manual) Gear Position Indicator Input
The body loom side of this pin connects to the shift select switch to indicate when the shifter is in the manual position.

The engine loom side of this pin connects to the engine ECU 3 pin.
31 Engine ECU: A/C

Air Condition ECU: MGC
Air Conditioning Request Signal Input The body loom side of this pin needs to be connected to the AC amplifier ECU MGC pin or an AC On / Off switch.

The engine loom side of this pin connects to the engine ECU A/C pin.
32 Engine ECU: ELS Electrical Load Sense Input The body loom side of this pin connects to the rear demister and headlight power supply wires with isolating diodes.

The engine loom side of this pin connects to the engine ECU ELS terminal.
33   Low Oil Level Switch Output The body loom side of this pin connects to the low oil level light located in the dash.

The engine loom side of this pin connects to the low oil level switch located at the sump on the middle, intake side of the engine.
34 Alternator: L Alternator Charge Warning Light Output The body loom side of this pin needs to be connected to the alternator charge warning light located in the dash.

The engine loom side of this pin connects to the alternator L pin.
35 Engine ECU: LPO2
Automatic Transmission Positon Switch Indication?
Output? The body loom side of this pin connects to the dash.

The engine loom side of this pin connects to the engine ECU LPO2 pin.
36  

Reverse Lights
&
Reverse Gear Automatic Transmission Position Switch Indicator

 

Output The body loom side of this pin needs to be connected to the reverse lights and in automatic transmission equipped vehicles to the dash to indicate when Reverse has been selected by the automatic transmission shifter.

The engine loom side of this pin connects to the transmission reverse position switch which outputs battery voltage when the transmission shifter is in the Reverse position.
37 Engine ECU: LPO3
Automatic Transmission Position Switch Indication?
Output? The body loom side of this pin connects to the dash.

The engine loom side of this pin connects to the engine ECU LPO3 pin.
38 Engine ECU: CIND
Traction Control Active Indication Light Output
The body loom side of this pin connects to the traction control active indication light located in the dash.

The engine loom side of this pin connects to the engine ECU CIND pin.

 

JZA80 Toyota Supra 2JZ-GTE VVTi 90980-11469 Engine Loom to Body Loom Plug (Grey) [BC1]

This plug is located inside the passenger foot well and mates with male connector 90980-11504. (BC1).

Note: Blue text indicates pins related to automatic transmission functions only.

Pin Symbol Definition Input / Output
(To engine = Input)
(From engine = Output)
Description
1  
Power to Coils and Igniter Input The body loom side of this pin needs to be connected to battery voltage via the ignition switch when the ignition is in the RUN and CRANK positions to switch battery voltage to the coils and igniter.

The engine loom side of this pin connects to the coil and igniter power supply pins.
2   Engine Coolant Temperature Dash Sensor Output The body loom side of this pin is not connected.

The engine loom side of this pin connects to the one wire engine coolant temperature sensor located at the engine coolant water outlet to the radiator on the front, upper, exhaust side of the engine.
3
 /  /  /  /
4 Engine ECU: FPC

Fuel Pump ECU: FPC
Fuel Pump Control Output The body loom side of this pin needs to be connected to the fuel pump ECU FPC pin.

The engine loom side of this pin is connects to the engine ECU FPC pin.
5  /  /  /  /
6  /  /  /  /
7

Engine ECU: NSW

(Engine ECU: STA)

Neutral / Park Automatic Transmission Position Switch Indicator

(Starter Motor Relay Trigger Signal)

Input

The body loom side of this pin needs to be connected to an ignition switched power source that supplies battery voltage when the ignition is in the CRANK Positions.

 
Manual transmission: The engine loom side of this pin is connected directly in the engine wiring loom to the engine ECU STA pin, the engine ECU NSW pin and to pin 3 of the engine loom to body plug 90980-10897 to trigger the starter relay.


Automatic transmission: The engine loom side of this pin connects directly in the engine wiring loom to the engine ECU NSW pin and to one side of the the automatic transmission park / neutral switch.  When the automatic transmission park / neutral switch is closed this pin is connected to the engine ECU STA pin and pin 3 of the engine loom to body plug 90980-10897 to trigger the starter relay.

Refer to pin 3 of body loom plug 90980-10897 for further information.

8  /  /  /  /
9  
Ignition Switched Power to Fuel Injectors Input

The body loom side of this pin needs to be connected to an ignition switched power source that supplies battery voltage when the ignition is in the CRANK Positions.


The engine loom side of this pin connects power to the fuel injector supply pins.

10   Low Oil Pressure Switch Output The body loom side of this pin is not connected.

The engine loom side of this pin connects to the low oil pressure switch located on the front, lower, intake side of the engine.
11 Engine ECU: STP Stop Light Switch Input The body loom side of this pin needs to be connected to the switched side of the brake light switch.

The engine loom side of this pin connects to the engine ECU STP pin.
12 Engine ECU: DI

Fuel Pump ECU: DI
Fuel Pump Diagnostic Indication Input The body loom side of this pin needs to be connected to fuel pump ECU DI terminal.

The engine loom side of this pin connects to the engine ECU DI pin.
13  /  /  /  /
14

Engine ECU: ABS

 

ABS ECU: EXO

ABS Input? The body loom side of this pin connects to the ABS ECU EXO pin.

The engine loom side of this pin connects to the engine ECU ABS pin.
15 Engine Mounted Diagnostic Connector: TS

ABS ECU: TS
Test Enable Input The body loom side of this pin connects to a number of control module 'TS' input pins.

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine TS pin.
16

Engine Mounted Diagnostic Connector: WA

ABS ECU: WA

 

ABS Input The body loom side of this pin connects to the ABS ECU WA pin and also the ABS light mounted in the dash.

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine WA pin.  Note that there is a shorting link inserted between terminals WA and WB of the engine mounted diagnostic connector.
17  /  /  /  /
18
 /  /  /  /
19

Engine Mounted Diagnostic Connector: OP4

 

Under Dash Mounted Diagnostic Connector: ABS

 

ABS ECU: D/G

ABS Input The body loom side of this pin connects to the drivers side under dash diagnostic connector ABS pin and the ABS ECU D/G pin.

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine OP4 pin.
20
 /  /  /  /

 

 

JZA80 Toyota Supra 2JZ-GTE VVTi 90980-11562 Engine Loom to Body Loom Plug (White) [BC2]

This plug is located inside the passenger foot well and mates with male connector 90980-11561. (BC2).

Note: Blue text indicates terminals related to automatic transmission functions only.

 

Pin Symbol Definition Input / Output
(To engine = Input)
(From engine = Output)
Description
1 Engine ECU: SNWI
Traction Control SNOW Mode Select Switch
Input

The body loom side of this pin connects to the traction control SNOW mode select switch.

 

The engine loom side of this pin connects to the engine ECU SNWI pin.

2  /  /  /  /
3
 
Drive Gear Automatic Transmission Position Switch Output
The body loom side of this pin connects to the automatic transmission D/M shift selector switch.

The engine loom side of this pin connects to automatic transmission shifter position switch mounted on the automatic transmission and outputs battery voltage when the automatic transmission shifter is in the D position.
4

Engine ECU: SIL

 

Under Dash Mounted Diagnostic Connector: SIL

 

OBDII
Output
The body loom side of this pin connects to the drivers side under dash diagnostic connector SIL pin.

The engine loom side of this pin connects to the engine ECU SIL pin.
5

Engine ECU: FRO

 

ABS ECU: FRO

Front Right Wheel Speed Input

The body loom side of this pin connects to the ABS ECU FRO pin.

 

The engine loom side of this pin connects to the engine ECU FRO pin.

6

Engine ECU: FLO

 

ABS ECU: FLO

Front Left Wheel Speed Input

The body loom side of this pin connects to the ABS ECU FLO pin.

 

The engine loom side of this pin connects to the engine ECU FLO pin.

7

Engine ECU: TC

 

Engine Mounted Diagnostic Connector: TC

 

Test Connector Output

The body loom side of this pin connects to the drivers side under dash diagnostic connector TC pin and pin 11 of body plug GC2-11 which connects to pin 21 of body plug 90980-11555.

 

The engine loom side of this pin connects to the engine ECU TC pin.

 

Refer to pin 21 of body loom plug 90980-11555 for further information.

 

8 Engine ECU: EC
Ground
Input

The body loom side of this pin needs to be connected to Ground for the PRE and PRE2 switches Ground.

 

The engine loom side of this pin connects to the engine ECU E1 pin.

9 Engine ECU: E1 Ground Output The body loom side of this pin connects to the ground for the steering wheel mounted, automatic transmission gear switch assembly.

The engine loom side of this pin connects to the engine Ground at the intake manifold.
10 Engine ECU: SFTD

Automatic Transmission Shift Down Input The body loom side of this pin connects to the steering wheel mounted, automatic transmission down gear switch.

The engine loom side of this pin connects to the engine ECU STFD pin.
11 Engine ECU: SFTU Automatic Transmission Shift Up Input The body loom side of this pin connects to the steering wheel mounted, automatic transmission up gear switch.

The engine loom side of this pin connects to the engine ECU STFU pin.
12
Engine ECU: MSW
Traction Control OFF
Input

The body loom side of this pin connects to the traction control off switch.

 

The engine loom side of this pin connects to the engine ECU MSW pin.

13  /  /  /  /

14

Engine ECU: RSPD

Road Speed Signal?

Output

The body loom side of this pin connects to the shift lock control ECU.

 

The engine loom side of this pin connects to the engine ECU RSPD pin.

15

Engine ECU: RRO

 

ABS ECU: RRO

Rear Right Wheel Speed Input

The body loom side of this pin connects to the ABS ECU RRO pin.

 

The engine loom side of this pin connects to the engine ECU RRO pin.

16

Engine ECU: RLO

 

ABS ECU: RLO

Rear Left Wheel Speed Input

The body loom side of this pin connects to the ABS ECU RLO pin.

 

The engine loom side of this pin connects to the engine ECU RLO pin.

 

JZA80 Toyota Supra 2JZ-GTE VVTi 90980-10897 Engine Loom to Body Loom Plug [BA1]

This plug is located inside the engine bay near the battery and mates with male connector 90980-10896. (BA1).

 

Pin Symbol Definition Input / Output
(To engine = Input)
(From engine = Output)
Description
1   AC Magnetic Clutch Input The body loom side of this pin needs to be connected to the AC magnetic clutch relay switched power output which switches battery voltage to the AC magnetic clutch to energise the clutch and turn the AC on.

The engine loom side of this pin connects to the AC magnetic clutch. The AC magnetic clutch is grounded via the engine block. 
2 Engine ECU: ACMG Air Conditioning Magnetic Clutch Relay Trigger Signal Output The body loom side of this pin needs to be connected to the AC magnetic clutch relay coil negative.

The engine loom side of this pin connects to the engine ECU ACMG pin.
3

Engine ECU: STA

(Engine ECU: NSW)

Starter Motor Relay Trigger Signal Output The body loom side of this pin needs to be connected to the starter motor relay coil positive to turn the relay on when the ignition switch is in CRANK position (and the automatic transmission park / neutral switch is in the park / neutral position if the vehicle is equipped with an automatic transmission).

Manual transmission: The engine loom side of this pin is connected in the engine wiring loom to the engine ECU STA pin, the engine ECU NSW pin and pin 7 of the engine loom to body plug 90980-11469.

Automatic transmission: The engine loom side of this pin is connected to the automatic transmission park / neutral position switch and also the engine ECU STA pin.

Refer to pin 7 of body loom plug 90980-11469 for further information.
4 Engine ECU: BATT Battery Power Input The body loom side of this pin needs to be connected to constant battery voltage.

The engine loom side of this pin connects to the engine ECU BATT pin.
5  /  /  /  /
6 Engine Mounted Diagnostic Connector: WB ABS Output The body loom side of this pin connects to the ABS actuator W pin.

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine WA pin.  Note that there is a shorting link inserted between terminals WA and WB of the diagnostic connector from factory.
7  /  /  /  /
8 Engine ECU: M-REL EFI Main Relay Trigger Signal Output The body loom side of this pin needs to be connected to the main EFI relay coil positive.

The engine loom side of this pin connects to the engine ECU M-REL pin.

 

JZA80 Toyota Supra 2JZ-GTE VVTi 90980-11413 Engine Loom to Body Loom Plug [BA2]

This plug is located inside the engine bay near the battery and mates with male connector 90980-11421 (BA2).

 

 

Pin Symbol Definition Input / Output
(To engine = Input)
(From engine = Output)
Description
1   Starter Motor Relay Switched Power Input The body loom side of this pin needs to be connected to the starter motor relay switched power output which switches battery voltage to the starter motor to turn it on and crank the engine.

The engine loom side of this pin connects to the starter motor solenoid.  The starter motor is grounded via the engine block. 
2 Engine Mounted Diagnostic Connector: +B
Main EFI Relay Switched Power Input

The body loom side of this pin needs to be connected to the main EFI relay switched power output which switches battery voltage to the VSVs, oxygen sensor and the engine mounted diagnostic connector +B pin.  The main EFI relay is switched via the engine ECU M-REL output pin.

 

The engine loom side of this pin connects to the engine ECU, VSVs and AFM power supply pins.

3 Engine ECU: +BM ETCS-i Power Input

The body loom side of this pin needs to be connected constantly to the battery via a 15A fuse.

 

The engine loom side of this pin connects to the engine ECU +BM pin.

4 Alternator: S
Alternator Battery Voltage Sense Input

The body loom side of this pin needs to be connected constantly to the battery via a 7.5A fuse.

 

The engine loom side of this pin connects to the alternator S pin.

5 Engine ECU: +B, +B1 Main EFI Relay Switched Power Input

The body loom side of this pin needs to be connected to the main EFI relay switched power output which switches battery voltage to the engine ECU, VSVs and AFM.  The main EFI relay is switched via the engine ECU M-REL output pin.

The engine loom side of this pin connects to the VSVs, oxygen sensor and engine mounted diagnostic connector +B power supply pins.

 

JZA80 Toyota Supra 2JZ-GTE VVTi Wiring Diagrams

 

 

JZA80 Electrical Wiring Diagram Book 6742505

JZA80 Electrical Wiring Diagram Book 6742505.pdf

 

 

 

 

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Comments (1)

wilbo666 said

at 7:43 am on Jun 7, 2013

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