Toyota isv valve ecu connection


 

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
89661‑1461005/1993 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
PinSymbolDefinitionInput/OutputWhatWhyHowLink
40 Pin Plug1IGSWIgnition SwitchInputThis pin is used to determine if the ignition is ON.The engine ECU is turned on by this signal.This pin is connected to toyota isv valve ecu connection voltage when the ignition switch is in RUN and CRANK positions. 
40 Pin Plug2SP1No.1 Speed SensorInputThis 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 Toyota isv valve ecu connection Plug3KDAutomatic Transmission Kick Down SwitchInputThis 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 toyota isv valve ecu connection switch is not pressed (Accelerator pedal is not fully depressed).  Note: 1991-10 toyota isv valve ecu connection 1993-08 models only, later models do not have this pin wired or a Kick Down switch installed.

 
40 Pin Plug4STPStop Light SwitchInputThis 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 Plug5EGWExhaust Gas Temperature Warning Light (Catalytic Converter)OutputThis 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 Plug6WEngine Warning Light (Check Toyota isv valve ecu connection Light)OutputThis 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 Plug7 / / / / / / 
40 Pin Plug8 / / / / / / 
40 Pin Plug922nd Gear Automatic Transmission Position IndicatorInputThis 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' toyota isv valve ecu connection Pin Plug10LLow Gear Automatic Transmission Position IndicatorInputThis 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 toyota isv valve ecu connection switch when the automatic transmission shifter is in the 'L' position. 
40 Pin Plug11 / / / / / / 
40 Pin Plug12OD1Over Drive Disable 1InputThis 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 Plug13 / / / / / / 
40 Pin Plug14 / / / / / / 
40 Pin Plug15ELSElectrical Load SenseInputThis 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 Plug16 / / / / / / 
40 Pin Plug17TTTest TerminalOutputThis 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 Plug18MAutomatic Transmission Manual Mode SelectInputThis 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 Plug19TE2Test mode select 2InputThis 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 Plug20TE1Test mode select 1InputThis 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 Plug21DIDiagnostic Indication - Fuel Pump ControlInputThis 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 Plug22FPCFuel Pump ControlOutputThis pin is used to signal the desired toyota isv valve ecu connection 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 Plug23ACMGAir Conditioning (AC) Magnetic Clutch RelayOutputThis 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 Plug24M-RELEFI Main RelayOutputThis 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, toyota isv valve ecu connection 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 Plug25MIManual IndicationOutputThis 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 Plug26 / / / / / / 
40 Pin Plug27 / / / / / / 
40 Pin Plug28OD2Over Drive Disable 2InputThis 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 Plug29CCO (<1997-08)
Catalytic Converter Temperature SensorInputThis 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 Plug30 / / / / / / 
40 Pin Plug31+BEFI Main Relay Switched PowerInputThis 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 Plug32+B1EFI Main Relay Switched PowerInputThis 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 toyota isv valve ecu connection 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 toyota isv valve ecu connection +B pin. 
40 Pin Plug33BATTBattery PowerInputThis pin is used to supply constant battery power to the ECU.Constant toyota isv valve ecu connection 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 Plug34A/CAir Conditioning (AC) Request SignalInputThis 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 Plug35PSPower SteeringInputThis 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 Plug36 / / / / / / 
40 Pin Plug37 / / / / / / 
40 Pin Plug38 / / / / / / 
40 Pin Plug39 / / / / / / 
40 Pin Plug40 / / / / / / 
 
 
 
 
 
 
 
 
 
80 Pin Plug1 / / / / / / 
80 Pin Plug2 / / / / / / 
80 Pin Plug3SP2-No.

2 Speed Sensor

InputThis 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 Toyota isv valve ecu connection 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 Plug4E11ECU GroundInputGroundUsed 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 Plug5 / / / / / / 
80 Pin Plug6 / / / / / / 
80 Pin Plug7G-DistributorInputThis 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 Plug8S3Automatic Transmission No.3 Lock Up SolenoidOutputThis toyota isv valve ecu connection 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 toyota isv valve ecu connection 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 toyota isv valve ecu connection is engaged.  The other side of the No.2 shift solenoid is Grounded inside the automatic transmission. 
80 Pin Plug9S2Automatic Transmission No.2 Shift SolenoidOutputThis pin is used to control the automatic transmission No.2 toyota isv valve ecu connection 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 Plug10S1Automatic Transmission No.1 Shift SolenoidOutputThis 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 toyota isv valve ecu connection ON in gears 1 & 2.  The other side of the No.1 shift solenoid is Grounded inside the automatic transmission. 
80 Pin Plug11 / / / / / / 
80 Pin Plug12 / / / / / / 
80 Pin Plug13 / / / / / / 
80 Pin Plug14 / / / / / / 
80 Pin Plug15#60No.

6 Injector (Rear)

OutputThis 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 Plug16#50No.

5 Injector

OutputThis pin is toyota isv valve ecu connection to control the No.5 toyota isv valve ecu connection 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 toyota isv valve ecu connection 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 Plug17#40No.

4 Injector

OutputThis pin is used to control the No.4 fuel injector.The fuel toyota isv valve ecu connection are electronically controlled by the engine ECU.This pin is connected to Ground inside the ECU as required to turn the fuel toyota isv valve ecu connection 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 Toyota isv valve ecu connection Plug18#30No.

3 Injector

OutputThis pin is used to toyota isv valve ecu connection 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 Plug19#20No.

2 Toyota isv valve ecu connection 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 toyota isv valve ecu connection 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 Plug20#10No.

1 Injector (Front)

OutputThis toyota isv valve ecu connection 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 Plug21 / / / / / / 
80 Pin Plug22 / / / / / / 
80 Pin Plug23SP2+No.

2 Speed Sensor

InputThis 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 toyota isv valve ecu connection to the No.2 speed sensor located on toyota isv valve ecu connection left, rear side of the automatic transmission and outputs 4 pulses (reluctor pulses) per revolution of the automatic transmission output shaft. 
80 Pin Plug24OILAutomatic Transmission Oil Temperature SensorInputThis 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 Plug25G2DistributorInputThis 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 Plug26G1DistributorInputThis 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 toyota isv valve ecu connection spark and ignition, the camshaft position toyota isv valve ecu connection 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 Plug27NEDistributorInputThis pin is used to detect the speed and toyota isv valve ecu connection 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 toyota isv valve ecu connection which outputs 24 pulses (reluctor pulses) per engine camshaft revolution. 
80 Pin Plug28VF2Voltage Feedback 2OutputThis pin is used to output toyota isv valve ecu connection 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 Plug29VF1Voltage Feedback 1OutputThis pin is used to output diagnostic voltages that are related to the air fuel ratio and O2 sensor as toyota isv valve ecu connection 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 toyota isv valve ecu connection Ground and the TPS IDL toyota isv valve ecu connection 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 Plug30 / / / / / / 
80 Pin Plug31 / / / / / / 
80 Pin Plug32ISC4Idle Speed Control Valve OutputThis 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 speedThere 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 Plug33ISC3Idle Speed Control ValveOutputThis 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 speedThere are a large number of items that effect idle speed (e.g.

engine temperature,  electrical load, etc) an toyota isv valve ecu connection 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 Plug34ISC2Idle Speed Control ValveOutputThis pin is used to open / close the Idle Speed Control Valve (ISCV) to allow more or toyota isv valve ecu connection air to enter the engine as required to keep the desired engine idle speedThere toyota isv valve ecu connection 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 Plug35ISC1Idle toyota isv valve ecu connection Speed Control ValveOutputThis 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 speedThere 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 Plug36 / / / / / / 
80 Pin Plug37 / / / / / / 
80 Pin Plug38 / / / / / / 
80 Pin Plug39ACISAcoustic Controlled Induction SystemOutputThis 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 Plug40 / / / / / / 
80 Pin Plug41VCC+5V Regulated PowerOutputThis 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 Plug42 / / / / / / 
80 Pin Plug43VTA1Throttle Position SensorInputThis pin is used to detect the position of the engine throttle.The measured toyota isv valve ecu connection 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 Plug44THWWater Temperature SensorInputThis 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 Plug45THAIntake Air Temperature SensorInputThis 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 toyota isv valve ecu connection side of the thermistor should be wired to the engine ECU pin E2 (Ground). 
80 Pin Plug46 / / / / / / 
80 Pin Plug47OX2Oxygen Toyota isv valve ecu connection 2  (Rear 3 Cylinders)InputThis 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.  Toyota isv valve ecu connection 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 toyota isv valve ecu connection stoichiometric air fuel ratio. 
80 Pin Plug48OX1Oxygen Sensor 1 (Front 3 Cylinders)InputThis 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 toyota isv valve ecu connection 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 Plug49KNK2No.2 Knock Sensor (Rear)InputThis 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 Plug50KNK1No.1 Knock Sensor (Front)InputThis 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 Plug51 / / / / / / 
80 Pin Plug52 / / / / / / 
80 Pin Plug53 / / / / / / 
80 Pin Plug54 / / / / / / 
80 Pin Plug55 / / / / / / 
80 Pin Plug56 / / / / / / 
80 Pin Plug57IGTIgniter Trigger SignalOutputThis 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 Plug58IGFIgniter Verification SignalInputThis 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 Plug59 / / / / / / 
80 Pin Plug60 / / / / / / 
80 Pin Plug61 / / / / / / 
80 Pin Plug62PIMPressure Intake Manifold (MAP Sensor)InputThis 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 Plug63 / / / / / / 
80 Pin Plug64IDL1Throttle Position Idle SensorInputThis pin is used to detect when the throttle is in the idle (fully closed) toyota isv valve ecu connection when the throttle is fully  closed allows the engine ECU to have a known position allowing it to compensate for slight variation in toyota isv valve ecu connection analogue signal.This pin is connected to Ground by a switch inside the throttle position sensor when the throttle is fully closed. 
80 Pin Plug65E2Sensor GroundOutputSensor ground.The throttle position and MAP sensors have a separate ground toyota isv valve ecu connection ensure clear toyota isv valve ecu connection signals.This pin is connected to sensor Ground inside the engine ECU.  Do not connect this pin to chassis Ground. 
80 Pin Plug66 / / / / / / 
80 Pin Plug67 / / / / / / 
80 Pin Plug68 / / / / / / 
80 Pin Plug69E1ECU GroundInputGroundUsed 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 Plug70 / / / / / / 
80 Pin Plug71 / / / / / / 
80 Pin Plug72 / / / / / / 
80 Pin Plug73 / / / / / / 
80 Pin Plug74EVAPEvaporative Emission Control Vacuum Switching ValveOutputThis pin is used to control the VSV which toyota isv valve ecu connection 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 toyota isv valve ecu connection 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 Plug75 / / / / / / 
80 Pin Plug76NSWNeutral & Park Switch  Auto Position IndicatorInputThis 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 toyota isv valve ecu connection position toyota isv valve ecu connection 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 Plug77STAStarter SignalInputThis 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 toyota isv valve ecu connection 'P' positions.  When the engine is not being cranked this pin is connected to Ground via the Starter Relay coil.

 

Manual toyota isv valve ecu connection 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 Plug78 / / / / / / 
80 Pin Plug79E02ECU GroundInputGroundUsed to supply a Ground path to allow current to flow.This pin connects to Ground or the toyota isv valve ecu connection negative via the Intake Manifold Rear Earth. 
80 Pin Plug80E01ECU toyota isv valve ecu connection GroundInputGroundUsed 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)

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

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

PinSymbolDefinitionInput / Output
(To engine = Input)
(From engine = Output)
Description
1 Neutral Gear Automatic Transmission Position Switch IndicatorOutputThe body loom side of this pin connects to the dash toyota isv valve ecu connection 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.
Источник: http://wilbo666.pbworks.com/w/page/41678224/2JZ-GE JZA80 Supra Engine Wiring

toyota isv valve ecu connection
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