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2JZ-GE JZA80 Supra Engine Wiring

Page history last edited by wilbo666 1 month, 3 weeks ago


 

Introduction

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

 

JZA80 Toyota Supra 2JZ-GE Engine ECU Part Numbers

Toyota Part Number
Dates
Transmission
89661‑14610 05/1993 to 08/2002

Manual Transmission

89661-14600

05/1993 to 09/1997
Automatic Transmission

89661-14810

09/1997 to 08/1999
Automatic Transmission

89661-14840

08/1999 to 08/2002
Automatic Transmission

 

JZA80 Toyota Supra 2JZ-GE Engine ECU Pinout

 

 

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

 

Plug
Pin Symbol Definition Input/Output What Why How Link
40 Pin Plug 1 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.  
40 Pin Plug 2 SP1 No.1 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.   Two speed sensors are used to provide a backup. This pin is connected to the combination meter speed output which outputs 4 pulses (Open collector square wave pulses) per No.1 speed sensor shaft revolution.  The combination meter receives its speed signal from the No.1 speed sensor which is located on the right, rear side of automatic transmission and outputs 4 pulses (0 to Battery Voltage square wave pulses) per sensor shaft revolution.
 
40 Pin Plug 3 KD Automatic Transmission Kick Down Switch Input This pin is used to detect when the accelerator pedal is fully depressed. Used to 'kick down' or change down a gear of automatic transmission under full throttle. This pin is Grounded by a switch that is located under the accelerator pedal that is pressed at full throttle. The Kick Down switch is open circuit when the switch is not pressed (Accelerator pedal is not fully depressed).  Note: 1991-10 to 1993-08 models only, later models do not have this pin wired or a Kick Down switch installed.  
40 Pin Plug 4 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 and exit deceleration fuel cut mode etc. This pin is connected to battery voltage when brake pedal is depressed, the ECU pin is open circuit when the brake pedal is not depressed.  
40 Pin Plug 5 EGW Exhaust Gas Temperature Warning Light (Catalytic Converter) Output This pin  is used to turn ON / OFF the exhaust gas warning light. The exhaust gas warning light comes on to inform of an overheated catalytic converter. This pin is Grounded by the ECU as required to turn the exhaust gas warning light ON.  Light ON = Error Condition, light OFF = Normal.  
40 Pin Plug 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.  
40 Pin Plug 7  /  /  /  /  /  /  
40 Pin Plug 8  /  /  /  /  /  /  
40 Pin Plug 9 2 2nd Gear Automatic Transmission Position Indicator Input This pin is used to determine if the automatic transmission shifter is in the 2nd position. The engine ECU needs to energize/de-energize 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.  
40 Pin Plug 10 L Low Gear Automatic Transmission Position Indicator Input This pin is used to determine if the automatic transmission shifter is in the L position. The engine ECU needs to energize/de-energize 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.  
40 Pin Plug 11  /  /  /  /  /  /  
40 Pin Plug 12 OD1 Over Drive Disable 1 Input This pin is used by the Cruise Control ECU to request to disable the automatic transmission over drive gear (4th Gear). The cruise control ECU may need to change to 3rd gear from 4th gear (over drive) to maintain the desired set speed. This pin is Grounded by the Cruise Control ECU to disable the automatic transmissions over drive gear.  
40 Pin Plug 13  /  /  /  /  /  /  
40 Pin Plug 14  /  /  /  /  /  /  
40 Pin Plug 15 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.  
40 Pin Plug 16  /  /  /  /  /  /  
40 Pin Plug 17 TT Test Terminal Output This pin  is used to output a diagnostic voltage dependent on throttle position, brake pedal position and automatic transmission gear position. Used to help in diagnosing issues with the TPS, brake and automatic transmission. Refer to TT section.  
40 Pin Plug 18 M Automatic Transmission Manual Mode Select Input This pin is used to select manual mode for the automatic transmission. Used to allow the automatic transmission to be manual shifted & hold the selected gear. This pin is toggled to ground to toggle the Normal / Manual automatic transmission shifting mode.  L = Locked in first gear, 2 = locked in second gear, D = Locked in third gear, but will shift to second gear at low speed.  
40 Pin Plug 19 TE2 Test mode select 2 Input This pin is used to select the test mode during which diagnostic serial data is sent out the VF1 pin. Used to help in diagnosing issues. This pin is connected to Ground to enable test mode.  
40 Pin Plug 20 TE1 Test mode select 1 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.  
40 Pin Plug 21 DI Diagnostic Indication - Fuel Pump Control Input This pin is used to determine if the Fuel Pump ECU is healthy. 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.  
40 Pin Plug 22 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.  
40 Pin Plug 23 ACMG Air Conditioning (AC) Magnetic Clutch Relay Output This pin is used to turn the AC magnetic clutch relay ON. ECU control of the AC enables the AC to be turned off during hard acceleration. This pin is Grounded by the ECU as required to turn the AC magnetic clutch relay ON.  One side of the AC magnetic clutch relay coil should be wired to this pin and one side of the AC magnetic clutch relay coil should be connected to battery voltage (Ignition switched) and one side of the relay coil connected to this ECU pin.  
40 Pin Plug 24 M-REL EFI Main Relay Output This pin is used to turn ON the Main EFI Relay which feeds power to the fuel pump, engine ECU, ISCV, 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 to fully open the ISCV. 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.  
40 Pin Plug 25 MI Manual Indication Output This pin  is used to turn ON / OFF the automatic transmission manual mode indication light. The automatic transmission manual mode indication light comes on to indicate  automatic transmission manual mode is selected. This pin is Grounded by the ECU as required to turn the automatic transmission manual mode indication light ON.  Light ON = automatic transmission manual ON, light OFF = automatic transmission manual mode OFF.  
40 Pin Plug 26  /  /  /  /  /  /  
40 Pin Plug 27  /  /  /  /  /  /  
40 Pin Plug 28 OD2 Over Drive Disable 2 Input This pin is used to disable the automatic transmission over drive gear (4th Gear) by a user switch. Used to enable the driver to disable the automatic transmission over drive gear (4th Gear) for towing, hills, etc. This pin is Grounded by the over drive switch to disable the automatic transmission over drive gear.  
40 Pin Plug 29 CCO (<1997-08)
Catalytic Converter Temperature Sensor Input This pin is used to measure the catalytic converter temperature. Used to inform the driver of an overheated catalytic converter. This pin connects to a thermistor that is installed after the catalytic converter to sense the catalytic converter temperature.  One side of the thermistor should be wired to this pin and one side of the thermistor should be wired to Ground.  
40 Pin Plug 30  /  /  /  /  /  /  
40 Pin Plug 31 +B 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 energized to supply power to the ECU.  The Main EFI Relay is triggered by the engine ECU pin M-REL pin.  This pin is connected inside the ECU to the +B1 pin.  
40 Pin Plug 32 +B1 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 energized to supply power to the ECU.  The Main EFI Relay is triggered by the engine ECU M-REL pin.  This pin is connected inside the ECU to the +B pin.  
40 Pin Plug 33 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.  
40 Pin Plug 34 A/C 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 usually generated by the climate control ECU, however connecting this pin to Ground will not guarantee that the AC is turned ON.  
40 Pin Plug 35 PS Power Steering Input This pin is used to determine if there is a large power steering load. Detection of power steering load can be used to improve idle & uturn situations. This pin is connected to Ground when the power steering load is high.  
40 Pin Plug 36  /  /  /  /  /  /  
40 Pin Plug 37  /  /  /  /  /  /  
40 Pin Plug 38  /  /  /  /  /  /  
40 Pin Plug 39  /  /  /  /  /  /  
40 Pin Plug 40  /  /  /  /  /  /  
 
 
 
 
 
 
 
 
 
80 Pin Plug 1  /  /  /  /  /  /  
80 Pin Plug 2  /  /  /  /  /  /  
80 Pin Plug 3 SP2- No. 2 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.   Two speed sensors are used to provide a backup in automatic transmission equipped vehicles. This pin connects to the No.2 speed sensor located on the left, rear side of the automatic transmission and outputs 4 pulses (reluctor pulses) per revolution of the automatic transmission output shaft.  
80 Pin Plug 4 E11 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 J/C Earth No.1 connector and the Intake Manifold Rear Earth.  
80 Pin Plug 5  /  /  /  /  /  /  
80 Pin Plug 6  /  /  /  /  /  /  
80 Pin Plug 7 G- Distributor Input This pin is used to detect the speed and location of the engine 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 distributor camshaft position sensors as the common ground.  
80 Pin Plug 8 S3 Automatic Transmission No.3 Lock Up Solenoid Output This pin is used to control the automatic transmission No.3 lock up 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 outputs battery voltage to turn the No.3 lock up solenoid ON as required.  When the No.3 lock up solenoid is on the torque converter lock up is engaged.  The other side of the No.2 shift solenoid is Grounded inside the automatic transmission.  
80 Pin Plug 9 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.  
80 Pin Plug 10 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.  
80 Pin Plug 11  /  /  /  /  /  /  
80 Pin Plug 12  /  /  /  /  /  /  
80 Pin Plug 13  /  /  /  /  /  /  
80 Pin Plug 14  /  /  /  /  /  /  
80 Pin Plug 15 #60 No. 6 Injector (Rear) 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.  
80 Pin Plug 16 #50 No. 5 Injector 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.  
80 Pin Plug 17 #40 No. 4 Injector 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.  
80 Pin Plug 18 #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.  
80 Pin Plug 19 #20 No. 2 Injector 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.  
80 Pin Plug 20 #10 No. 1 Injector (Front) 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.  
80 Pin Plug 21  /  /  /  /  /  /  
80 Pin Plug 22  /  /  /  /  /  /  
80 Pin Plug 23 SP2+ No. 2 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.   Two speed sensors are used to provide a backup in automatic transmission equipped vehicles. This pin connects to the No.2 speed sensor located on the left, rear side of the automatic transmission and outputs 4 pulses (reluctor pulses) per revolution of the automatic transmission output shaft.  
80 Pin Plug 24 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).  
80 Pin Plug 25 G2 Distributor Input This pin is used to detect the location of the intake camshaft. The engine ECU needs to know if the engine is on the compression or exhaust stroke for sequential spark and ignition, the camshaft position sensor provides this information. This pin connects to the No.2 camshaft position sensor located inside the distributor which outputs 1 pulse (reluctor pulse) per camshaft revolution.  A pulse is generated slightly before the TDC on the cylinder 1 compression stroke which is used to determine the engine position for sequential ignition and fuel.  
80 Pin Plug 26 G1 Distributor Input This pin is used to detect the location of the intake camshaft. The engine ECU needs to know if the engine is on the compression or exhaust stroke for sequential spark and ignition, the camshaft position sensor provides this information. This pin connects to the No.1 camshaft position sensor located inside the distributor which outputs 1 pulse (reluctor pulse) per camshaft revolution.  A pulse is generated slightly before the TDC on the cylinder 1 compression stroke which is used to determine the engine position for sequential ignition and fuel.  
80 Pin Plug 27 NE Distributor Input This pin is used to detect the speed and location of the engine 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 distributor camshaft position sensor which outputs 24 pulses (reluctor pulses) per engine camshaft revolution.  
80 Pin Plug 28 VF2 Voltage Feedback 2 Output This pin is used to output diagnostic voltages that are related to the air fuel ratio and O2 sensor. Used to help in diagnosing issues. This pin outputs a diagnostic voltage related to fuel trim.  When the engine ECU pin TE1 is connected to Ground and the TPS IDL contact is OFF (engine ECU pin IDL1 is not connected to Ground) this pin outputs 0V when the engine ECU detects a lean O2 condition and 5V when the engine ECU detects a rich O2 condition.   
80 Pin Plug 29 VF1 Voltage Feedback 1 Output This pin is used to output diagnostic voltages that are related to the air fuel ratio and O2 sensor as well as OBD serial data. Used to help in diagnosing issues. This pin outputs a diagnostic voltage related to fuel trim.  When the engine ECU pin TE1 is connected to Ground and the TPS IDL contact is OFF (engine ECU pin IDL1 is not connected to Ground) this pin outputs 0V when the engine ECU detects a lean O2 condition and 5V when the engine ECU detects a rich O2 condition.  When the engine ECU pin TE1 is connected to Ground and the TPS IDL contact is ON (engine ECU pin IDL1 is connected to Ground) this pin outputs 0V if no trouble codes are stored and 5V if trouble codes have been stored.  When the engine ECU pin TE2 is connected to Ground serial OBD data is outputted by this pin.  
80 Pin Plug 30  /  /  /  /  /  /  
80 Pin Plug 31  /  /  /  /  /  /  
80 Pin Plug 32 ISC4 Idle Speed Control Valve  Output This pin is used to open / close the Idle Speed Control Valve (ISCV) to allow more or less air to enter the engine as required to keep the desired engine idle speed There are a large number of items that effect idle speed (e.g. engine temperature,  electrical load, etc) an Idle Speed Control Valve allows the engine ECU to compensate and attempt to maintain the desired engine idle RPM. This pin is connected to Ground inside the ECU as required in a sequenced fashion with the other ISCVx pins to open / close the ISCV as required by the engine ECU.  The ISCV has two power pins which should be connected to battery voltage (Main EFI Relay switched).  
80 Pin Plug 33 ISC3 Idle Speed Control Valve Output This pin is used to open / close the Idle Speed Control Valve (ISCV) to allow more or less air to enter the engine as required to keep the desired engine idle speed There are a large number of items that effect idle speed (e.g. engine temperature,  electrical load, etc) an Idle Speed Control Valve allows the engine ECU to compensate and attempt to maintain the desired engine idle RPM. This pin is connected to Ground inside the ECU as required in a sequenced fashion with the other ISCVx pins to open / close the ISCV as required by the engine ECU.  The ISCV has two power pins which should be connected to battery voltage (Main EFI Relay switched).  
80 Pin Plug 34 ISC2 Idle Speed Control Valve Output This pin is used to open / close the Idle Speed Control Valve (ISCV) to allow more or less air to enter the engine as required to keep the desired engine idle speed There are a large number of items that effect idle speed (e.g. engine temperature,  electrical load, etc) an Idle Speed Control Valve allows the engine ECU to compensate and attempt to maintain the desired engine idle RPM. This pin is connected to Ground inside the ECU as required in a sequenced fashion with the other ISCVx pins to open / close the ISCV as required by the engine ECU.  The ISCV has two power pins which should be connected to battery voltage (Main EFI Relay switched).  
80 Pin Plug 35 ISC1 Idle Speed Control Valve Output This pin is used to open / close the Idle Speed Control Valve (ISCV) to allow more or less air to enter the engine as required to keep the desired engine idle speed There are a large number of items that effect idle speed (e.g. engine temperature,  electrical load, etc) an Idle Speed Control Valve allows the engine ECU to compensate and attempt to maintain the desired engine idle RPM. This pin is connected to Ground inside the ECU as required in a sequenced fashion with the other ISCVx pins to open / close the ISCV as required by the engine ECU.  The ISCV has two power pins which should be connected to battery voltage (Main EFI Relay switched).  
80 Pin Plug 36  /  /  /  /  /  /  
80 Pin Plug 37  /  /  /  /  /  /  
80 Pin Plug 38  /  /  /  /  /  /  
80 Pin Plug 39 ACIS Acoustic Controlled Induction System Output This pin is used to control the VSV which is used to open / close the ACIS Valve that controls the tuned intake system. The ACIS allows the length of the intake runners to be varied to increase torque at low RPM. This pin is connected to Ground inside the ECU as required to turn the ACIS VSV ON opening the ACIS valve and reducing the length of the intake runners .  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).  
80 Pin Plug 40  /  /  /  /  /  /  
80 Pin Plug 41 VCC +5V Regulated Power Output This pin is used to supply +5V power to the throttle position and MAP sensors. The throttle position and MAP sensors require regulated and constant +5V to operate. This pin outputs regulated +5V to the throttle position sensors and the MAP sensor.  
80 Pin Plug 42  /  /  /  /  /  /  
80 Pin Plug 43 VTA1 Throttle Position Sensor Input This pin is used to detect the position of the engine throttle. The measured position of the engine throttle is a useful parameter for engine operation, particularly in transient conditions such as acceleration. This pin measures the variable voltage from the throttle position sensor that represents how open / closed the throttle is.  
80 Pin Plug 44 THW Water Temperature Sensor Input This pin is used to measure the temperature of the engine coolant. 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).  
80 Pin Plug 45 THA Intake Air Temperature Sensor Input This pin is used to measure the temperature of the engine inlet manifold air. The engine air temperature has an effect on the engines operation, such as reducing ignition timing if the intake air is very hot. This pin connects to a thermistor that is installed at the middle, engine side of the engine intake manifold to the radiator on the front, upper, exhaust side of the engine to measure engine air intake 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).  
80 Pin Plug 46  /  /  /  /  /  /  
80 Pin Plug 47 OX2 Oxygen Sensor 2  (Rear 3 Cylinders) 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.  
80 Pin Plug 48 OX1 Oxygen Sensor 1 (Front 3 Cylinders) 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.  
80 Pin Plug 49 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.  
80 Pin Plug 50 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.  
80 Pin Plug 51  /  /  /  /  /  /  
80 Pin Plug 52  /  /  /  /  /  /  
80 Pin Plug 53  /  /  /  /  /  /  
80 Pin Plug 54  /  /  /  /  /  /  
80 Pin Plug 55  /  /  /  /  /  /  
80 Pin Plug 56  /  /  /  /  /  /  
80 Pin Plug 57 IGT Igniter Trigger Signal Output This pin is used to control the ignition. 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.  
80 Pin Plug 58 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.  
80 Pin Plug 59  /  /  /  /  /  /  
80 Pin Plug 60  /  /  /  /  /  /  
80 Pin Plug 61  /  /  /  /  /  /  
80 Pin Plug 62 PIM Pressure Intake Manifold (MAP Sensor) Input This pin is used to determine the manifold air pressure (MAP). Manifold air pressure is a primary component in the speed density fuel injection control algorithm that is used, it is also used to control the sequential turbo system. 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.  
80 Pin Plug 63  /  /  /  /  /  /  
80 Pin Plug 64 IDL1 Throttle Position Idle Sensor Input This pin is used to detect when the throttle is in the idle (fully closed) position. Knowing when the throttle is fully  closed allows the engine ECU to have a known position allowing it to compensate for slight variation in the analogue signal. This pin is connected to Ground by a switch inside the throttle position sensor when the throttle is fully closed.  
80 Pin Plug 65 E2 Sensor Ground Output Sensor ground. The throttle position 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.  
80 Pin Plug 66  /  /  /  /  /  /  
80 Pin Plug 67  /  /  /  /  /  /  
80 Pin Plug 68  /  /  /  /  /  /  
80 Pin Plug 69 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.  
80 Pin Plug 70  /  /  /  /  /  /  
80 Pin Plug 71  /  /  /  /  /  /  
80 Pin Plug 72  /  /  /  /  /  /  
80 Pin Plug 73  /  /  /  /  /  /  
80 Pin Plug 74 EVAP 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 EVAP 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).  
80 Pin Plug 75  /  /  /  /  /  /  
80 Pin Plug 76 NSW Neutral & Park Switch  Auto Position Indicator 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.

Automatic transmission: This pin is connected to Ground by the Starter Relay coil via the automatic shifter position switch when the automatic transmission shifter is in the 'N' or 'P' positions.

 

Manual Transmission: This pin is connected to the engine ECU STA pin inside the engine wiring loom and hence is connected to battery voltage when the ignition switch is in the CRANK position.  When the engine is not being cranked this pin is connected to Ground via the Starter Relay coil

 
80 Pin Plug 77 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.

Automatic transmission: This pin is connected to battery voltage when the ignition switch is in the CRANK position and the automatic transmission shifter is in the 'N' or 'P' positions.  When the engine is not being cranked this pin is connected to Ground via the Starter Relay coil.

 

Manual transmission: This pin is connected to battery voltage when the ignition switch is in the CRANK position.  When the engine is not being cranked this pin is connected to Ground via the Starter Relay coil.

 
80 Pin Plug 78  /  /  /  /  /  /  
80 Pin Plug 79 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.  
80 Pin Plug 80 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.  

 

JZA80 Toyota Supra 2JZ-GE Engine Loom to Body Loom Pinout

 

JZA80 Toyota Supra 2JZ-GE 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.
3  /  /  /  /
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: OD2 Over Drive Disable 2 Input The body loom side of this pin needs to be connected to the automatic transmission overdrive switch.

The engine loom side of this pin connects to the engine ECU OD2 pin.
6 Engine ECU: EGW Exhaust Gas Temperature Warning Light (Catalytic Converter) Output The body loom side of this pin connects to the exhaust gas warning light located in the dash.

The engine loom side of this pin connects to the engine ECU EGW pin.
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  /  /  /  /
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 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.
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  /  /  /  /
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   Drive Gear Automatic Transmission Position Switch Indicator Output The body loom side of this pin connects to the dash to indicate when Drive  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 Drive position.
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 under the intake manifold.
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 Mounted Diagnostic Connector: TC

ABS Control ECU: TC

Cruise Control ECU: TC
Test Connector Input The body loom side of this pin connects to the 'TC' pin on a number of control modules.

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine.
22  /  /  /  /
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 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  /  /  /  /
29 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 diagnostic connector IG- pin mounted on the side of the engine and the igniter tachometer output pin which connects to the coil negative via the igniter.
30  /  /  /  /
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  /  /  /  /
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  /  /  /  /
38 Engine ECU: MI Automatic Transmission Manual Mode Indication Light Output The body loom side of this pin needs to be connected to the automatic transmission manual mode indication light located in the dash.

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

 

JZA80 Toyota Supra 2JZ-GE 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  
Ignition Switched Power to Coil 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 power to the coil positive.

2 (Not 05-1995 to 4-1996)  /  /  /  /
2 (05-1995 to 4-1996) Engine ECU: KD Automatic Transmission Kick Down Switch Input The body loom side of this pin connects to the automatic transmission manual kick down switch.

The engine loom side of this pin is connected to the engine ECU KD pin.
3 (<05-1995) Engine ECU: IDL1 Throttle Closed Switch Output The body loom side of this pin connects to the cruise control ECU, etc.

The engine loom side of this pin is connected to the throttle TPS and connects to Ground when the throttle is in the idle (fully closed) position.
3 (05-1995 to 04-1996) Engine ECU: M Automatic Transmission Manual Mode Select Input The body loom side of this pin connects to the automatic transmission manual mode select switch.

The engine loom side of this pin is connected to the engine ECU M pin.
3 (>04-1996) Engine ECU: KD Automatic Transmission Kick Down Switch Input The body loom side of this pin connects to the automatic transmission manual kick down switch.

The engine loom side of this pin is connected to the engine ECU KD pin.
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 Engine ECU: TE1

Engine Mounted Diagnostic Connector: TE1

Under Dash Mounted Diagnostic Connector: TE1
Test Enable Input The body loom side of this pin connects to the drivers side under dash diagnostic connector TE1 pin.

The engine loom side of this pin connects to the engine ECU TE1 pin and the diagnostic connector mounted on the side of the engine TE1 pin.
6 Engine ECU: TT

Under Dash Mounted Diagnostic Connector: TT
Test Terminal Output The body loom side of this pin connects to the drivers side under dash diagnostic connector TT pin.

The engine loom side of this pin connects to the engine ECU TT pin.
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 Engine Mounted Diagnostic Connector: FP Fuel Pump Power Input The body loom side of this pin needs to be connected to the positive side of the fuel pump wiring.

The engine loom side of this pin connects to the diagnostic connector mounted on the side of the engine to allows power to be directly applied to the fuel pump in order to test its functionality.
9  
Ignition Switched Power to Igniter and 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 igniter and the fuel injector supply pins.

10  /  /  /  /
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 Engine ECU: VF1

Engine Mounted Diagnostic Connector: VF

Under Dash Mounted Diagnostic Connector: ENG
Voltage Feedback Diagnostics Output The body loom side of this pin connects to the drivers side under dash diagnostic connector ENG pin.

The engine loom side of this pin connects to the engine ECU VF1 pin and the diagnostic connector mounted on the side of the engine VF pin.
14  /  /  /  /
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 Engine ECU: TE2

Engine Mounted Diagnostic Connector: TE2

Under Dash Mounted Diagnostic Connector: TE2
Test Enable Input The body loom side of this pin connects to the drivers side under dash diagnostic connector TE2 pin.

The engine loom side of this pin connects to the engine ECU TE2 pin and the diagnostic connector mounted on the side of the engine TE2 pin.
18 (<1997-08)
Under Dash Mounted Diagnostic Connector: E1
Ground Output The body loom side of this pin connects to the drivers side under dash diagnostic connector E1 pin and the negative side of the catalytic converter temperature sensor.

The engine loom side of this pin connects to the engine Ground.
18 (>1997-08)
Under Dash Mounted Diagnostic Connector: E1
Ground Output The body loom side of this pin connects to the drivers side under dash diagnostic connector E1 pin.

The engine loom side of this pin connects to the engine Ground.
19 (<1997-08) Engine ECU: CCO

Engine Mounted Diagnostic Connector: CCO
Catalytic Converter Temperature Sensor Input The body loom side of this pin connects to the positive side of the catalytic converter temperature sensor.

The engine loom side of this pin connects to the engine ECU CCO pin and the diagnostic connector mounted on the side of the engine CCO pin.
19 (>1997-08)  /  /  /  /
20 (<04-1996)  /  /  /  /
20 (>04-1996) Engine ECU: M Automatic Transmission Manual Mode Select Input The body loom side of this pin connects to the automatic transmission manual mode select switch.

The engine loom side of this pin is connected to the engine ECU M pin.

 

 

JZA80 Toyota Supra 2JZ-GE 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  /  /  /  /
2  /  /  /  /
3 (<05-1995) Engine ECU: M Automatic Transmission Manual Mode Select Input The body loom side of this pin connects to the automatic transmission manual mode select switch.

The engine loom side of this pin is connected to the engine ECU M pin.
3 (>05-1995)  /  /  /  /
4  /  /  /  /
5  /  /  /  /
6  /  /  /  /
7 Cruise Control ECU: D Drive Gear Automatic Transmission Position Switch Indicator Output The body loom side of this pin connects to the dash to indicate when Drive  has been selected by the automatic transmission shifter and also the cruise control ECU D pin, etc.

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 Drive position.
8  /  /  /  /
9  /  /  /  /
10 Engine ECU: S2

Cruise Control ECU: ECT
Automatic Transmission No.2 Shift Solenoid Output The body loom side of this pin connects to the cruise control ECU ECT pin.

The engine loom side of this pin connects to the engine ECU S2 pin.
11 Engine ECU: OD1

Cruise Control ECU: O/D
Over Drive Disable 1 Input The body loom side of this pin connects to the cruise control ECU O/D pin.

The engine loom side of this pin connects to the engine ECU OD1  pin.
12 (<05-1995) Engine ECU: KD Automatic Transmission Kick Down Switch Input The body loom side of this pin connects to the automatic transmission manual kick down switch.

The engine loom side of this pin is connected to the engine ECU KD pin.
12 (>05-1995)  /  /  /  /
13  /  /  /  /
14  /  /  /  /
15  /  /  /  /
16  /  /  /  /

 

 

JZA80 Toyota Supra 2JZ-GE 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-GE 90980-10841 Engine Loom to Body Loom Plug [BA3]

This plug is located inside the engine bay near the battery and mates with male connector 90980-10944. (BA3).

 

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 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.

 

3 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. ISCV, VSVs, etc.  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, ISCV, VSVs, etc power supply pins.

 

JZA80 Toyota Supra 2JZ-GE Wiring Diagrams

 

 

 

 

 

 

JZA80 Electrical Wiring Diagram Book 6742505

JZA80 Electrical Wiring Diagram Book 6742505.pdf

 

JZA80 Electrical Wiring Diagram Book EWD175Y (USA-1995)

JZA80 Electrical Wiring Diagram Book EWD175Y (USA-1995).pdf

 

 

 

 

 

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Comments (1)

wilbo666 said

at 7:43 am on Jun 7, 2013

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