2JZ-GTE VVTi JZA80 Supra Engine Wiring

2JZ-GTE VVTi JZA80 Supra Engine Wiring

Introduction

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

 

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

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

 

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

JZA80 Toyota Supra 2JZ-GTE VVTi Engine ECU Pinout

 

Plug Pin Symbol Definition Input / Output What Why How Link
B74 1 #30 No. 3 Injector Output This pin is used to control the No.3 fuel injector. The fuel injectors are electronically controlled by the engine ECU. This pin is connected to Ground inside the ECU as required to turn the fuel injector ON.  The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.  
B74 2 #40 Cyl 4 Injector Driver Output This pin is used to control the No.4 fuel injector. The fuel injectors are electronically controlled by the engine ECU. This pin is connected to Ground inside the ECU as required to turn the fuel injector ON.  The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.  
B74 3 #50 Cyl 5 Injector Driver Output This pin is used to control the No.5 fuel injector. The fuel injectors are electronically controlled by the engine ECU. This pin is connected to Ground inside the ECU as required to turn the fuel injector ON.  The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.  
B74 4 #60 Cyl 6 Injector Driver Output This pin is used to control the No.6 fuel injector. The fuel injectors are electronically controlled by the engine ECU. This pin is connected to Ground inside the ECU as required to turn the fuel injector ON.  The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.  
B74 5 VSV1 Intake Air Bypass Valve Vacuum Switching Valve Output This pin is used to control the VSV which is used to open / close the Intake Air Bypass Valve that is a component of the sequential turbo system. The Intake Air Control Valve allows pressurised air to exit the rear turbocharger allowing it to fully come online as part of the sequential turbo system. This pin is connected to Ground inside the ECU as required to turn the Intake Air Control Valve VSV ON allowing pressurised intake air to open the Intake Air Control Valve.  One side of the VSV should be wired to this pin and one side of VSV should be wired to battery voltage (Main EFI Relay switched).  
B74 6 / / / / / /  
B74 7 M- ETCS-i  Motor Output This pin is used to control the electronic throttle control motor. The throttle is controlled by an electric motor that is controlled by the engine ECU.  Having the throttle controlled by the engine ECU allows idle speed control, traction control, cruise control, etc to be built directly into the engine ECU simplifying the system. This pin is used together with the M+ pin to power the electric motor to allow it to be opened and closed by the engine ECU as required.  The ETCS-i clutch must be engaged for the electric motor to be able to open or close the throttle.  The M+ and M- pins are triggered by the engine ECU in a PWM fashion.  
B74 8 M+ ETCS-i  Motor Output This pin is used to control the electronic throttle control motor. The throttle is controlled by an electric motor that is controlled by the engine ECU.  Having the throttle controlled by the engine ECU allows idle speed control, traction control, cruise control, etc to be built directly into the engine ECU simplifying the system. This pin is used together with the M- pin to power the electric motor to allow it to be opened and closed by the engine ECU as required.  The ETCS-i clutch must be engaged for the electric motor to be able to open or close the throttle.  The M+ and M- pins are triggered by the engine ECU in a PWM fashion.  
B74 9 ME01 ETCS-i Ground Input Ground Used to supply a Ground path to allow current to flow.  A separate ground is used for the electronic throttle control system to reduce noise introduced between systems. This pin connects to Ground or the battery negative.  
B74 10 G2 Intake Camshaft Position Sensor Input This pin is used to detect the location of the intake camshaft. The engine ECU needs to know the position of the intake camshaft for variable intake camshaft position control, the camshaft position sensor provides this information. This pin connects to the camshaft position sensor located to the rear of the intake side of the engine head which outputs 3 pulse (reluctor pulses) per camshaft revolution.  
B74 11 IGT Ignition Trigger Cyl 1 & Cyl 6 Output This pin is used to control the ignition for cylinders 1 & 6. The ignition timing is electronically controlled by the engine ECU. This pin is connected to +5V inside the engine ECU as required to trigger engine ignition.  Ignition is  triggered on the high (+5V) to low (0V) transition.  
B74 12 IGT2 Ignition Trigger Cyl 5 & Cyl 2 Output This pin is used to control the ignition for cylinders 5 & 2. The ignition timing is electronically controlled by the engine ECU. This pin is connected to +5V inside the engine ECU as required to trigger engine ignition.  Ignition is  triggered on the high (+5V) to low (0V) transition.  
B74 13 IGT3 Ignition Trigger Cyl 3 & Cyl 4 Output This pin is used to control the ignition for cylinders 3 & 4. The ignition timing is electronically controlled by the engine ECU. This pin is connected to +5V inside the engine ECU as required to trigger engine ignition.  Ignition is  triggered on the high (+5V) to low (0V) transition.  
B74 14 / / / / / /  
B74 15 PMC Pressure Modulation Control (Wastegate) Vacuum Switching Valve Output This pin is used to control the VSV which controls the turbo wastegate on the front turbo.  This VSV allows the engine ECU to attempt to control boost pressure. The Wastegate Control Valve allows exhaust gas to pre-spool the rear turbocharger prior to it coming online as part of the sequential turbo system. This pin is connected to Ground inside the ECU as required to turn the Pressure Modulation Control valve which is more commonly called the wastegate control valve ON allowing pressurised intake air to be diverted away from the mechanical wastegate actuator.  When this VSV is ON the mechanical wastegate actuator will not operate and the wastegate will not open, this will result in a very large amount of boost pressure being generated by the turbochargers.  One side of the VSV should be wired to this pin and one side of VSV should be wired to battery voltage (Main EFI Relay switched).  
B74 16 / / / / / /  
B74 17 OCV- VVTi Solenoid Output This pin is used to control the solenoid that controls position of the intake camshaft. Controlling the position of the intake camshaft can be used to improve performance and fuel economy. This pin is used together with the OCV+ pin to power a solenoid that allows engine oil pressure to be used to vary the position of the intake camshaft.  The OCV+ and OCV- pins are triggered by the engine ECU in a PWM fashion.  
B74 18 OCV+ VVTi Solenoid Output This pin is used to control the solenoid that controls position of the intake camshaft. Controlling the position of the intake camshaft can be used to improve performance and fuel economy. This pin is used together with the OCV- pin to power a solenoid that allows engine oil pressure to be used to vary the position of the intake camshaft.  The OCV+ and OCV- pins are triggered by the engine ECU in a PWM fashion.  
B74 19 CL- ETCS-i  Clutch Output This pin is used to control the electronic throttle control clutch. The throttle is controlled by an electric motor that is controlled by the engine ECU however there is a clutch that is controlled by the engine ECU that must be engaged for the electric motor to be able to move the throttle.  If the engine ECU detects an issue with the ETCS-i system it will disable the clutch as a safety feature. This pin is used together with the CL+ pin to power the clutch that allows the electric motor to open and close engine throttle.  The ETCS-i clutch must be engaged for the electric motor to be able to open or close the throttle.  
B74 20 CL+ ETCS-i  Clutch Output This pin is used to control the electronic throttle control clutch. The throttle is controlled by an electric motor that is controlled by the engine ECU however there is a clutch that is controlled by the engine ECU that must be engaged for the electric motor to be able to move the throttle.  If the engine ECU detects an issue with the ETCS-i system it will disable the clutch as a safety feature. This pin is used together with the CL- pin to power the clutch that allows the electric motor to open and close engine throttle.  The ETCS-i clutch must be engaged for the electric motor to be able to open or close the throttle.  
B74 21 EO1 ECU Ground Input Ground Used to supply a Ground path to allow current to flow. This pin connects to Ground or the battery negative.  
B74 22 NE- Crankshaft & Intake Camshaft Position Sensor Ground Input This pin is used to provide a Ground to detect the speed and location of the engine crankshaft and intake camshaft. The engine ECU needs to know the position of the engine so that it can accurately provide fuel and ignition. This pin connects to the engine crankshaft position sensor and the intake camshaft position sensor.  
B74 23 NE+ Crankshaft Position Sensor Input This pin is used to detect the speed and location of the engine crankshaft. The engine ECU needs to know the position of the engine so that it can accurately provide fuel and ignition. This pin connects to the engine crankshaft position sensor located to the lower front of the exhaust side of the engine near the alternator which outputs 36-2 pulses (reluctor pulses) per engine crankshaft revolution.  
B74 24 NSW Neutral & Park Switch Input This pin is used to determine if the automatic transmission shifter is in the Park or Neutral positions. The engine ECU needs to energise/de-energise the automatic transmission solenoids to select the correct gear. This pin is connected to Ground by the automatic shifter position switch and the Starter Relay coil when the automatic transmission shifter is in the ‘N’ or ‘P’ positions.  In manual vehicles this pin is connected to the engine ECU STA pin.  
B74 25 IGF Igniter Verification Signal Input This is pin is used to detect if ignition has taken place successfully. If no ignition is occurring and fuel injection continues the spark plugs can be fouled and backfires can occur in the exhaust, the igniter sends a signal to inform the engine so that it can stop fuel injection if successful ignition is not detected. This pin is connected to Ground by the Igniter for a short period of time after a successful ignition event has been detected.  
B74 26 / / / / / /  
B74 27 KNK2 No.2 Knock Sensor (Rear) Input This pin is used to measure engine knock. Engine knock can occur if too much ignition timing and poor fuel are present, as engine knock can damage an engine the engine ECU used a knock sensor to detect and compensate for knock if is  detected. This pin connects to the signal output of the knock sensor which is mounted under the intake manifold, to the rear of the engine and screwed into the side of the engine block.  The knock sensor is Grounded via the engine block.  8.1kHz is the normal mode vibration.  
B74 28 KNK1 No.1 Knock Sensor (Front) Input This pin is used to measure engine knock. Engine knock can occur if too much ignition timing and poor fuel are present, as engine knock can damage an engine the engine ECU used a knock sensor to detect and compensate for knock if is  detected. This pin connects to the signal output of the knock sensor which is mounted under the intake manifold, to the front of the engine and screwed into the side of the engine block.  The knock sensor is Grounded via the engine block.  8.1kHz is the normal mode vibration.  
B74 29 LCKI Airconditioning Compressor Lock Sensor Input This pin is used to detect the speed of the airconditioning compressor. This speed sensor can be used to detect if the airconditioning compressor seizes or becomes disconnected, in which case the engine ECU will disable the airconditioning compressor to avoid further damage. This pin connects to the airconditioning compressor speed sensor located at the bottom of the airconditioning compressor.  The other side of the airconditioning compressor speed sensor should be connected to ground.  
B74 30 GEO1 ETCS-i Motor Shielding Output This pin is used to shield the wires used to control the electronic throttle control electric motor. Operation of the electronic throttle control electric motor can generate a significant amount of electrical noise, shielding of the wires has been used to reduce the amount of electrical noise that is transmitted into other systems. This pin is connected to ground inside the engine ECU and connects to the shield that covers the wires (M+ and M-) that are used to control the electronic throttle control electric motor.  
B74 31 EO2 ECU Ground Input Ground Used to supply a Ground path to allow current to flow. This pin connects to Ground or the battery negative.  
                 
Plug Pin Symbol Definition Input / Output What Why How Link
B75 1 / / / / / /  
B75 2 VC Sensor Power Output This pin is used to supply +5V power to the throttle position 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.  
B75 3 VSV2 Exhaust Gas Control Valve Vacuum Switching Valve Output This pin is used to control the VSV which is used to open / close the Exhaust Gas Control Valve that is a component of the sequential turbo system. The Exhaust Gas Control Valve allows exhaust gas to exit the rear turbocharger allowing it to fully come online as part of the sequential turbo system. This pin is connected to Ground inside the ECU as required to turn the Exhaust Gas Control Valve VSV ON allowing pressurised intake air to open the Exhaust Gas Control Valve.  One side of the VSV should be wired to this pin and one side of VSV should be wired to battery voltage (Main EFI Relay switched).  
B75 4 HT Oxygen Sensor Heater Output This pin is used to control the heater for the exhaust gas oxygen sensor. The oxygen sensor requires a certain temperature to start operating, to allow this temperature to be reached quickly and allow the oxygen sensor to start operation the sensor is heated. This pin connects to Ground inside the engine ECU as required to turn the oxygen sensor heater on.  One side of the oxygen sensor heater should be wired to this pin and one side of oxygen sensor heater should be wired to battery voltage (Main EFI Relay switched).  
B75 5 #10 Cyl 1 Injector Driver Output This pin is used to control the No.1 fuel injector. The fuel injectors are electronically controlled by the engine ECU. This pin is connected to Ground inside the ECU as required to turn the fuel injector ON.  The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.  
B75 6 #20 Cyl 2 Injector Driver Output This pin is used to control the No.2 fuel injector. The fuel injectors are electronically controlled by the engine ECU. This pin is connected to Ground inside the ECU as required to turn the fuel injector ON.  The fuel injector should be wired with one side of the solenoid connected to battery voltage (Ignition switched) and one side of the fuel injector connected to this ECU pin.  
B75 7 PRG Evaporative Emission Control Vacuum Switching Valve Output This pin is used to control the VSV which is used to allow fuel vapour from the charcoal canister to enter the intake manifold and enter the engine. Fuel vapours from the fuel tank are captured in the charcoal canister to protect the environment, the PRG VSV is used to allow these captured emissions to be burnt during normal engine operation as determined by the engine ECU. This pin is connected to Ground inside the ECU as required to turn the Evaporative Emissions Control Valve VSV ON allowing fuel emissions to pass to the intake manifold into the engine.  One side of the VSV should be wired to this pin and one side of VSV should be wired to battery voltage (Main EFI Relay switched).  
B75 8 MOPS Main Oil Pressure Switch Input This pin is used to sense low engine oil pressure. The engine ECU can vary some engine parameters if it detects low oil pressure. This pin connects to a pressure switch that is installed at the oil filter assembly on the lower, intake side of the engine to measure engine oil pressure.  The oil pressure switch is grounded via the engine block.  
B75 9 PIM Pressure Intake Manifold (MAP Sensor) Input This pin is used to determine the manifold air pressure (MAP). Manifold air pressure is used for control of the sequential turbo system as well as boost cut. This pin connects to the signal output of the MAP sensor which contains a small sensor to measure air pressure.  A small vacuum hose connects the MAP sensor to the intake after the throttle body.  
B75 10 VG Engine Airflow Input This pin is used to determine the engine airflow. Engine airflow is a primary component in the fuel injection control algorithm.  If the engine airflow is known then the amount of fuel required to achieve a desired air fuel ratio can be calculated by the engine ECU. This pin connects to the signal output of the airflow sensor.  The airflow sensor is located in the engine intake piping just after the airfilter.  
B75 11 / / / / / /  
B75 12 OX Oxygen Sensor Input This pin is used to determine the exhaust gas air fuel ratio. The engine ECU will aim for an air fuel ratio near stoichiometric (neither rich or lean) to enhance fuel economy under periods of low load. This pin connects to the signal output of the oxygen sensor that is mounted in the exhaust.  The factory oxygen sensor is a ‘narrow band’ oxygen sensor that outputs approximately 0V when the air fuel ratio is lean and approximately 1V when the air fuel ratio is rich.  The engine ECU will aim to keep the engine running at stoichiometric by alternating between very slightly rich and very slightly lean conditions, as the sensor is only a narrow band sensor this is a practical way to achieve (or very close to) the desired stoichiometric air fuel ratio.  
B75 13 N Automatic Transmission Neutral Gear Position Indicator Input This pin is used to determine if the automatic transmission shifter is in the Neutral position. The engine ECU needs to energise/de-energise the automatic transmission solenoids to select the correct gear. This pin is connected to battery voltage by the automatic shifter position switch when the automatic transmission shifter is in the ‘N’ position.  
B75 14 THW Water Temperature Sensor Input This pin is used to measure the temperature of the engine coolant exiting the engine. The engine coolant temperature has a significant effect on the engines operation, for example requiring more fuel during ‘warm up’ conditions. This pin connects to a thermistor that is installed at the engine coolant water outlet to the radiator on the front, upper, exhaust side of the engine to measure engine coolant temperature.  One side of the thermistor should be wired to this pin and one side of the thermistor should be wired to the engine ECU pin E2 (Ground).  
B75 15 VPA Throttle Position Sensor  (Demand Position Sensor) Input This pin is used to effectively detect the position of the accelerator pedal which reflects the operators desired throttle position. The operators desired throttle position is a useful parameter for engine operation, particularly in transient conditions such as acceleration. This pin measures the variable voltage from one of the outputs from the position sensor that measures how depressed the accelerator pedal is.  The position sensor has two outputs (VPA and VPA2) with different responses that allow the engine ECU to perform diagnostics during normal operation.  
B75 16 VPA2 Throttle Position Sensor (Demand Position Sensor) Input This pin is used to effectively detect the position of the accelerator pedal which reflects the operators desired throttle position. The operators desired throttle position is a useful parameter for engine operation, particularly in transient conditions such as acceleration. This pin measures the variable voltage from one of the outputs from the position sensor that measures how depressed the accelerator pedal is.  The position sensor has two outputs (VPA and VPA2) with different responses that allow the engine ECU to perform diagnostics during normal operation.  
B75 17 E1 ECU Ground Input Ground. Used to supply a Ground path to allow current to flow. This pin connects to Ground or the battery negative.  
B75 18 E2 Sensor Ground Output Sensor ground. The throttle position, airflow, air and water temperature and MAP sensors have a separate ground to ensure clear signals. This pin is connected to sensor Ground inside the engine ECU.  Do not connect this pin to chassis Ground.  
B75 19 EVG Airflow Meter Ground Input Airflow meter signal ground. The airflow meter sensor has a separate signal ground to ensure a clear signal. This pin is connected to sensor Ground inside the engine ECU.  Do not connect this pin to chassis Ground.  
B75 20 2 Automatic Transmission 2nd Gear Position Indicator Input This pin is used to determine if the automatic transmission shifter is in the 2nd position. The engine ECU needs to energise/de-energise the automatic transmission solenoids to select the correct gear. This pin is connected to battery voltage by the automatic shifter position switch when the automatic transmission shifter is in the ‘2’ position.  
B75 21 L Automatic Transmission 1st Gear Position Indicator Input This pin is used to determine if the automatic transmission shifter is in the L position. The engine ECU needs to energise/de-energise the automatic transmission solenoids to select the correct gear. This pin is connected to battery voltage by the automatic shifter position switch when the automatic transmission shifter is in the ‘L’ position.  
B75 22 THA Air Temperature Sensor Input This pin is used to measure the temperature of the engine intake air. The engine air temperature has an effect on the air density so should be measured so the correct air density can be calculated. This pin connects to a thermistor that is installed in the airflow sensor The airflow sensor is located in the engine intake piping just after the airfilter.  
B75 23 VTA Throttle Position Sensor (Actual Throttle Position Sensor) Input This pin is used to detect the actual position of the throttle. The actual throttle position allows the engine ECU to set the throttle to a know position based on the desired throttle position and the engine ECUs desired programming. This pin measures the variable voltage from one of the outputs from the position sensor that measures the actual throttle position.  The position sensor has two outputs (VTA and VTA2) with different responses that allow the engine ECU to perform diagnostics during normal operation.  
B75 24 VTA2 Throttle Position Sensor (Actual Throttle Position Sensor) Input This pin is used to detect the actual position of the throttle. The actual throttle position allows the engine ECU to set the throttle to a know position based on the desired throttle position and the engine ECUs desired programming. This pin measures the variable voltage from one of the outputs from the position sensor that measures the actual throttle position.  The position sensor has two outputs (VTA and VTA2) with different responses that allow the engine ECU to perform diagnostics during normal operation.  
                 
Plug Pin Symbol Definition Input / Output What Why How Link
B76 1 S1 Automatic Transmission No.1 Shift Solenoid Output This pin is used to control the automatic transmission No.1 shift solenoid. The automatic transmission gear selection is controlled by electronic solenoids. This pin outputs battery voltage to turn the No.1 shift solenoid ON as required.  The No.1 shift solenoid is ON in gears 1 & 2.  The other side of the No.1 shift solenoid is Grounded inside the automatic transmission.  
B76 2 S2 Automatic Transmission No.2 Shift Solenoid Output This pin is used to control the automatic transmission No.2 shift solenoid. The automatic transmission gear selection is controlled by electronic solenoids. This pin outputs battery voltage to turn the No.2 shift solenoid ON as required .  The No.2 shift solenoid is ON in gears 2 & 3.  The other side of the No.2 shift solenoid is Grounded inside the automatic transmission.  
B76 3 S3 Automatic Transmission Shift Solenoid Output ? ? ?  
B76 4 NCO+ Automatic Transmission Over Drive Direct Clutch Speed Sensor Input This pin is used to detect the speed of the automatic transmission O/D input shaft. Detection of the automatic transmission OD input shaft speed can be used to improve shift timing and ensure smooth gear shifts. This pin connects to the OD speed sensor located on the left, front side of the automatic transmission and outputs a number of pulses (reluctor pulses) per revolution of the OD direct clutch drum.  
B76 5 SP2+ Speed Sensor Input This pin is used to determine vehicle speed. Vehicle speed is used in idle control, automatic transmission shift control, cruise control, speed limiting etc. This pin connects to the speed sensor located on the left, rear side of the automatic transmission and outputs 12 pulses (reluctor pulses) per revolution of the automatic transmission output shaft.  
B76 6 S4 Automatic Transmission Shift Solenoid Output ? ? ?  
B76 7 SLU+ Automatic Transmission Lock Up Solenoid Output This pin is used to control the automatic transmission lock up torque converter control solenoid which is used to enable torque converter lock up. The automatic transmission lock up torque converter is controlled by an electronic solenoid. This pin in association with the SLU- pin outputs battery voltage to turn the lock up torque converter solenoid ON.  
B76 8 SLN+ Automatic Transmission Accumulator Back Pressure Solenoid Output This pin is used to control the automatic transmission accumulator back pressure control solenoid. The automatic transmission accumulator back pressure is controlled by an electronic solenoid. This pin in association with the SLN- pin outputs Pulse Width Modulated (PWM) battery voltage to turn the accumulator back pressure control solenoid ON.  
B76 9 SLT+ Automatic Transmission Line Pressure Control Solenoid Output This pin is used to control the automatic transmission line pressure control solenoid. The automatic transmission line pressure is controlled by an electronic solenoid. This pin in association with the SLT- pin outputs Pulse Width Modulated (PWM) battery voltage to turn the line pressure control solenoid ON.  
B76 10 NCO- Automatic Transmission Over Drive Direct Clutch Speed Sensor Input This pin is used to detect the speed of the automatic transmission O/D input shaft. Detection of the automatic transmission OD input shaft speed can be used to improve shift timing and ensure smooth gear shifts. This pin connects to the OD speed sensor located on the left, front side of the automatic transmission and outputs a number of pulses (reluctor pulses) per revolution of the OD direct clutch drum.  
B76 11 SP2- Speed Sensor Input This pin is used to determine vehicle speed. Vehicle speed is used in idle control, automatic transmission shift control, cruise control, speed limiting etc. This pin connects to the speed sensor located on the left, rear side of the automatic transmission and outputs 12 pulses (reluctor pulses) per revolution of the automatic transmission output shaft.  
B76 12 VSV3 Exhaust Bypass Valve Vacuum Switching Valve Output This pin is used to control the VSV which is used to open / close the Exhaust Bypass Valve that is a component of the sequential turbo system. The Exhaust Bypass Valve allows exhaust gas to pre-spool the rear turbocharger prior to it coming online as part of the sequential turbo system. This pin is connected to Ground inside the ECU as required to turn the Exhaust Bypass Valve VSV ON allowing pressurised intake air to open the Exhaust Bypass Valve.  One side of the VSV should be wired to this pin and one side of VSV should be wired to battery voltage (Main EFI Relay switched).  
B76 13 SLU- Automatic Transmission Lock Up Solenoid Output This pin is used to control the automatic transmission lock up torque converter control solenoid which is used to enable torque converter lock up. The automatic transmission lock up torque converter is controlled by an electronic solenoid. This pin in association with the SLU+ pin outputs battery voltage to turn the lock up torque converter solenoid ON.  
B76 14 SLN- Automatic Transmission Accumulator Back Pressure Solenoid Output This pin is used to control the automatic transmission accumulator back pressure control solenoid. The automatic transmission accumulator back pressure is controlled by an electronic solenoid. This pin in association with the SLN+ pin outputs Pulse Width Modulated (PWM) battery voltage to turn the accumulator back pressure control solenoid ON.  
B76 15 SLT- Automatic Transmission Line Pressure Control Solenoid Output This pin is used to control the automatic transmission line pressure control solenoid. The automatic transmission line pressure is controlled by an electronic solenoid. This pin in association with the SLT+ pin outputs Pulse Width Modulated (PWM) battery voltage to turn the line pressure control solenoid ON.  
B76 16 FPU Fuel Pressure Up Vacuum Switching Valve Output This pin is used to control the VSV which is used to increase fuel pressure during hot soak starting. To reduce the possibility of fuel vapour formation in the fuel rail during starting from hot soak conditions the Fuel Pressure Up VSV is used to increase the fuel rail pressure for a short period of time after hot soak starting. This pin is connected to Ground inside the ECU as required to turn the Fuel Pressure Up VSV ON which vents the fuel pressure regulator reference to atmosphere resulting in increased fuel rail pressure.  One side of the VSV should be wired to this pin and one side of VSV should be wired to battery voltage (Main EFI Relay switched).  
B76 17 OIL Automatic Transmission Oil Temperature Sensor Input This pin is used to measure the automatic transmission oil temperature. The automatic transmission oil temperature has a significant effect on the automatic transmissions operation, the engine ECU can compensate if the automatic transmission oil temperature is measured. This pin connects to a thermistor that is installed inside the automatic transmission to measure the automatic transmission oil temperature.  One side of the thermistor should be wired to this pin and one side of the thermistor should be wired to the engine ECU pin E2 (Ground).  
                 
Plug Pin Symbol Definition Input / Output What Why How Link
B77 1 AC Air Conditioning (AC) Request Signal Input This pin is used to request that the AC be turned ON. Having an AC request input and a separate control output allows the engine ECU to turn the AC OFF under some conditions, such as hard acceleration. This pin is connected to Ground to request that the AC be turned ON.  The AC request signal is generated by the climate control ECU, however connecting this pin to Ground will not guarantee that the AC is turned ON.  
B77 2 STA Starter Signal Input This pin is used to determine if the engine is being cranked. The engine ECU can take action to allow the engine to start easier if it is aware that the engine is trying to be started. This pin is connected to battery voltage when the ignition switch is in CRANK position.  
B77 3 / / / / / /  
B77 4 SFTU Automatic Transmission Shift Up Input This pin is used to detect the drivers request to shift the automatic transmission up a gear from the steering wheel controls, when the automatic transmission shifter is in the ‘M’ position. Driver control of the automatic transmission. This pin is connected to ground when the switch to shift the automatic transmission up a gear is activated, the ECU pin is open circuit when the switch is not activated.  
B77 5 TC Test Connector Input This pin is used to select the test mode during which diagnostic codes are flashed on the check engine light. Used to help in diagnosing issues. This pin is connected to Ground to enable test mode.  
B77 6 STP Stop Light Switch Input This pin is used to detect when the brake pedal is depressed. Used to disable the automatic transmission lock up torque converter, exit deceleration fuel cut, cruise control etc. This pin is connected to battery voltage when the brake pedal is depressed, the ECU pin is open circuit when the brake pedal is not depressed.  
B77 7 3 Automatic Transmission M (Manual) Gear Position Indicator Input This pin is used to determine if the automatic transmission shifter is in the ‘M’ (Manual) position. In the Manual position the automatic transmission gear position is controlled by the engine ECU pins SFTU and SFTD. The engine ECU needs to energise/de-energise the automatic transmission solenoids to select the correct gear. This pin is connected to battery voltage by the automatic shifter position switch when the automatic transmission shifter is in the ‘M’ position.  
B77 8 / / / / / /  
B77 9 / / / / / /  
B77 10 / / / / / /  
B77 11 / / / / / /  
B77 12 / / / / / /  
B77 13 ACMG Airconditioning Magnetic Clutch Relay Trigger Output This pin is used to turn the airconditioning magnetic clutch relay ON. ECU control of the airconditiong enables the airconditioning to be turned off during hard acceleration, etc. This pin is Grounded by the ECU as required to turn the airconditioning magnetic clutch relay ON.  One side of the airconditioning magnetic clutch relay coil should be wired to this pin and one side of the airconditioning magnetic clutch relay coil should be connected to battery voltage (Ignition switched) and one side of the relay coil connected to this ECU pin.  
B77 14 SFTD Automatic Transmission Shift Down Input This pin is used to detect the drivers request to shift the automatic transmission down a gear from the steering wheel controls, when the automatic transmission shifter is in the ‘M’ position. Driver control of the automatic transmission. This pin is connected to ground when the switch to shift the automatic transmission down a gear is activated, the ECU pin is open circuit when the switch is not activated.  
B77 15 / / / / / /  
B77 16 R Automatic Transmission Reverse Gear Position Indicator Input This pin is used to determine if the automatic transmission shifter is in the reverse position. The engine ECU needs to energise/de-energise the automatic transmission solenoids to select the correct gear. This pin is connected to battery voltage by the automatic shifter position switch when the automatic transmission shifter is in the ‘R’ position.  
B77 17 D Automatic Transmission Drive Gear Position Indicator Input This pin is used to determine if the automatic transmission shifter is in the drive position. The engine ECU needs to energise/de-energise the automatic transmission solenoids to select the correct gear. This pin is connected to battery voltage by the automatic shifter position switch when the automatic transmission shifter is in the ‘D’ position.  
B77 18 RRO Rear Right Wheel Speed Input This pin is used to receive the right, rear wheel speed. Wheel speed is used in operation of the traction control system. This pin connects to the ABS ECU which outputs a slaved Pulse Width Modulated (PWM) signal related to wheel RPM.  
B77 19 RLO Rear Left Wheel Speed Input This pin is used to receive the left, rear wheel speed. Wheel speed is used in operation of the traction control system. This pin connects to the ABS ECU which outputs a slaved Pulse Width Modulated (PWM) signal related to wheel RPM.  
B77 20 TACH Tachometer Output This pin is used to output a PWM signal that correlates to engine RPM. Engine RPM is displayed on the dash and also available at the diagnostic connector mounted on the side of the engine. This pin outputs a 0V to battery voltage Pulse Width Modulated (PWM) signal related to engine RPM.  
B77 21 ABS ABS Activated? Input? It is suspected that this pin is used to determine when the ABS is active and retard engine timing. Reduced ignition time will reduce engine power which is used by the ABS to attempt to maintain braking traction. This pin is connected to the ABS control ECU EXO pin, which it is suspected is connected to ground when the ABS system is activated.  
B77 22 / / / / / /  
B77 23 / / / / / /  
B77 24 / / / / / /  
B77 25 SPD No.1 Speed Sensor (Manual Transmission).

No.1 Speed Signal (Automatic Transmission).

Input (Manual Transmission),

Output (Automatic Transmission)

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

This pin is used to provide the vehicle speed signal to the dash (Automatic Transmission).

Vehicle speed is used in idle control, automatic transmission, cruise control control, speed limiting etc (Manual Transmission).

Vehicle speed is outputted so that it can be displayed on the combination meter (Automatic Transmission).

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

This pin generates a signal that is equivalent to the gearbox mounted speed sensor in a manual transmission equipped vehicle.  In an automatic transmission equipped vehicle there is no dedicated speed sensor for the combination meter, to allow the combination meter to function the required speed signal is generated by the engine ECU to simulate the not fitted, dedicated speed sensor.  The engine ECU outputs 4 pulses (0 to Battery Voltage square wave pulses) per tail shaft revolution.  (Automatic Transmission).

 
B77 26 ELS Electrical Load Sense Input This pin is used to signal that heavy electrical loads are ON (e.g. rear demister). Heavy electrical loads place more load on the alternator and hence the engine, the engine ECU can adjust for these heavy electrical loads if it is aware of them. This pin is connected to battery voltage when a heavy electrical load is ON.  
B77 27 RSPD Road Speed Signal? Output This pin is used to transmit a vehicle speed related signal to the shift lock control ECU. The shift lock control ECU can prevent the shifting from the automatic transmission Park position under certain circumstances. It is suspected that this pin outputs a high value when the vehicle is moving.  It is suspected that this will enable the operator to select a gear without depressing the brake pedal if the transmission is placed into Park while the vehicle is moving.  
B77 28 / / / / / /  
                 
Plug Pin Symbol Definition Input / Output What Why How Link
B78 1 BATT Battery Power Input This pin is used to supply constant battery power to the ECU. Constant battery power allows the engine ECU to retain error codes, fuel trims, etc. This pin is connected to battery voltage at all times via the 25A EFI fuse.  
B78 2 SNOW Automatic Transmission SNOW Mode Indication Light Output This pin is used to turn ON / OFF the SNOW mode indication light. The SNOW mode indication light comes on to indicate that SNOW mode for the automatic transmission has been selected. This pin is Grounded by the ECU as required to turn the SNOW indication light ON.  The SNOW indication light should be wired with one side of the light connected to battery voltage (Ignition Switched) and one side of the light connected to this ECU pin.  Light ON = SNOW mode selected, light OFF = Normal.  
B78 3 SNWI Automatic Transmission SNOW Mode Select Switch Input This pin is used to enable / disable SNOW mode for the automatic transmission. In conditions such as snow the automatic transmission can be controlled such that 1st gear is not selected and the vehicle starts in 2nd gear to limit torque / wheel spin. This pin is Grounded by the SNOW mode select switch by the operator to select SNOW mode for the automatic transmission.  
B78 4 DI Diagnostic Indication (Fuel Pump Control) Input This pin is used to determine if the Fuel Pump ECU is healthy. This pin lets the engine ECU know if the Fuel Pump ECU is healthy, if the Fuel Pump ECU is not healthy the engine ECU stops the output on the FPC pin. This pin is connected to battery voltage when the Fuel Pump ECU is healthy, the pin is open circuit when Fuel Pump ECU is not healthy.  
B78 5 FPC Fuel Pump Control Output This pin is used to signal the desired fuel pump speed to the Fuel Pump ECU. The fuel pump speed can be reduced at low load conditions to make the fuel quieter and improve fuel pump longevity. This pin outputs a 0V to 5V Pulse Width Modulated (PWM) signal which is connected to the Fuel Pump ECU to control fuel pump speed.  
B78 6 W Engine Warning Light (Check Engine Light) Output This pin is used to turn ON / OFF the check engine light. The check engine light comes on to inform of a detected engine issue. This pin is Grounded by the ECU as required to turn the Check Engine Light ON.  The check engine light should be wired with one side of the light connected to battery voltage (Ignition Switched) and one side of the light connected to this ECU pin.  Light ON = Error Condition, light OFF = Normal.  
B78 7 +BM ETCS-i Power Input This pin is used to supply constant battery power to the ECU for the electronic throttle control system. Used to supply power for the electronic throttle control system. This pin is connected to battery voltage at all times via the 15A ETCS fuse.  
B78 8 +B2 EFI Main Relay Switched Power Input This pin is used to supply switched battery power to the ECU. Used to supply power. This pin is connected to battery voltage when the Main EFI Relay is energised to supply power to the ECU.  The Main EFI Relay is triggered by the engine ECU pin M-REL pin.  
B78 9 IGSW Ignition Switch Input This pin is used to determine if the ignition is ON. The engine ECU is turned on by this signal. This pin is connected to battery voltage when the ignition switch is in RUN and CRANK positions.  
B78 10 M-REL EFI Main Relay Trigger Output This pin is used to turn ON the Main EFI Relay which feeds power to the fuel pump, engine ECU, engine VSVs and O2 sensor heater circuits, etc. ECU control of the main power relay allows the ECU to remain powered up after engine shutdown. This pin is connected to battery voltage inside the ECU as required to turn the Main EFI Relay ON when the ignition switch is ON.  Note that this pin continues to output voltage for a few second after the ignition has been switched off to allow the ISCV to be fully opened by the ECU for the next engine start.  One side of the Main EFI Relay coil should be connected to this pin and one side of the Main EFI Relay coil should be connected to Ground.  
B78 11 SIL OBDII Output This pin is used to provide OBDII diagnostic information. Many engine parameters can be monitored via the OBDII interface, which maybe particularly helpful in diagnosing issues that maybe present in the engine control system. The ISO 9141-2 K-Line standard is used to provide OBDII information via serial.  
B78 12 / / / / / /  
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B78 15 / / / / / /  
B78 16 +B Switched Battery Power Input This pin is used to supply switched battery power to the ECU. Used to supply power. This pin is connected to battery voltage when the Main EFI Relay is energized to supply power to the ECU.  The Main EFI Relay is triggered by the engine ECU pin M-REL pin.  
B78 17 / / / / / /  
B78 18 / / / / / /  
B78 19 / / / / / /  
B78 20 / / / / / /  
B78 21 / / / / / /  
B78 22 EC PRE and PRE2 Switches Ground Input Ground. Used to supply a Ground path to allow current to flow.  It is believed that a separate ground is used for the PRE and PRE2 switch inputs due to the location of the PRE and PRE2 switches. This pin connects to Ground or the battery negative.  
                 
Plug Pin Symbol Definition Input / Output What Why How Link
B79 1 IND Traction Control Enable / Disabled Indication Light Output This pin is used to turn On / Off the traction control off, indication light. The traction control off, indication light comes on to indicate that traction control has been disabled. This pin is Grounded by the ECU as required to turn the traction control off indication light ON.  The traction control off, indication light should be wired with one side of the light connected to battery voltage (Ignition Switched) and one side of the light connected to this ECU pin.  Light ON = Traction control disabled, light OFF = Normal.  
B79 2 MSW Traction Control OFF Switch Input This pin is used to enable / disable traction control. The operator may choose to disable traction control. This pin is Grounded by the traction control OFF switch by the operator to disable traction control.  
B79 3 LPO1 Automatic Transmission Combination Meter LCD Output? It is believe that this pin is used to transmit information from the engine ECU for display on the small LCD screen built into the tachometer. The LCD displays information such as current automatic transmission gear. Exactly operation of this pin is currently unknown.  
B79 4 LPO2 Automatic Transmission Combination Meter LCD Output? It is believe that this pin is used to transmit information from the engine ECU for display on the small LCD screen built into the tachometer. The LCD displays information such as current automatic transmission gear. Exactly operation of this pin is currently unknown.  
B79 5 / / / / / /  
B79 6 / / / / / /  
B79 7 FRO Front Right Wheel Speed Input This pin is used to receive the right, front wheel speed. Wheel speed is used in operation of the traction control system. This pin connects to the ABS ECU which outputs a slaved Pulse Width Modulated (PWM) signal related to wheel RPM.  
B79 8 FLO Front Left Wheel Speed Input This pin is used to receive the left, front wheel speed. Wheel speed is used in operation of the traction control system. This pin connects to the ABS ECU which outputs a slaved Pulse Width Modulated (PWM) signal related to wheel RPM.  
B79 9 / / / / / /  
B79 10 / / / / / /  
B79 11 / / / / / /  
B79 12 / / / / / /  
B79 13 / / / / / /  
B79 14 CIND Traction Control Active Indication Light Output This pin is used to turn On / Off the traction control active indication light. The traction control active indication light comes on to indicate that traction control is active, that is the traction control system is attempting to prevent the loss of traction. This pin is Grounded by the ECU as required to turn the traction control active indication light ON.  The traction control active indication light should be wired with one side of the light connected to battery voltage (Ignition Switched) and one side of the light connected to this ECU pin.  Light ON = Traction control active, light OFF = Normal.  
B79 15 / / / / / /  
B79 16 / / / / / /  
B79 17 LPO3 Automatic Transmission Combination Meter LCD Output? It is believe that this pin is used to transmit information from the engine ECU for display on the small LCD screen built into the tachometer. The LCD displays information such as current automatic transmission gear. Exactly operation of this pin is currently unknown.  
B79 18 SPTL Automatic Transmission Combination Meter LCD Output? It is believe that this pin is used to transmit information from the engine ECU for display on the small LCD screen built into the tachometer. The LCD displays information such as current automatic transmission gear. Exactly operation of this pin is currently unknown.  
B79 19 BZ Reverse Buzzer Output This pin is used to turn On / Off the reversing buzzer. The reversing buzzer is used to provide audible indication that reverse gear has been selected on the automatic transmission This pin is connected to battery voltage within the engine ECU to turn the buzzer located in the combination meter on.  Buzzer ON = Reverse gear selected, Buzzer OFF = Reverse gear not selected.  
B79 20 / / / / / /  
B79 21 / / / / / /  
B79 22 / / / / / /  
B79 23 / / / / / /  
B79 24 / / / / / /  
B79 25 / / / / / /  
B79 26 / / / / / /  

2JZ-GTE VVTi JZA80 Supra Engine Wiring

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