For automotive technicians and car enthusiasts working on a 1996 Acura Integra GSR, understanding the Engine Control Unit (ECU) wire pinout is crucial for diagnostics, repairs, and modifications. This detailed guide provides a comprehensive breakdown of the OBD2 ECU pin connections for the 1996 Acura Integra GSR, specifically the p72 ECU, ensuring you have the precise information needed for your automotive projects. Whether you are troubleshooting electrical issues, performing an engine swap, or simply need to verify wire connections, this pinout diagram is an indispensable resource.
The ECU, often referred to as the car’s computer, manages various engine functions by processing signals from numerous sensors and controlling actuators. Knowing the pin assignments allows for targeted testing and prevents potential damage from incorrect wiring. This pinout information is specifically for the OBD2 compliant 1996 Acura Integra GSR model, equipped with the p72 ECU.
Below is the detailed pinout information, categorized by connector (A, B, and D) for clarity. Each pin is listed with its corresponding pin number, wire color, signal name, and a brief description of its function.
ECU Connector A Pinouts (p72 OBD1)
- A1: BRN – INJ1 – Injector 1
- A2: YEL – INJ4 – Injector 4
- A3: RED – INJ2 – Injector 2
- A4: GRN/YEL – VTS – VTEC Solenoid
- A5: BLU – INJ3 – Injector 3
- A6: ORN/BLK – PO2SHTC – O2 Sensor Heater Control
- A7: GRN/BLU – FLR1 – Fuel Pump Relay Control
- A8: (empty) – Not Used
- A9: BLK/BLU – IACV – Idle Air Control Valve
- A10: (empty) – Not Used
- A11: (empty) – Not Used
- A12: GRN – FANC – Engine Coolant Temperature Switch
- A13: GRN/ORN – MIL – Malfunction Indicator Lamp (Check Engine Light)
- A14: (empty) – Not Used
- A15: BLK/RED – ACC – A/C Compressor Clutch Relay Control
- A16: WHT/GRN – ALT C – Alternator Control
- A17: PNK/BLU – IAB – Intake Air Bypass Solenoid
- A18: (empty) – Not Used
- A19: YEL (AUTO ONLY) – (Automatic Transmission Only)
- A20: RED – PCS – EVAP Purge Control Solenoid
- A21: YEL/GRN – ICM – Ignition Control Module
- A22: (empty) – Not Used
- A23: BLK – PG1 – Programmed Ground 1
- A24: BLK – PG2 – Programmed Ground 2
- A25: YEL/BLK – IGP2 – Ignition Power 2 (to Main Relay and Ground for O2 Sensor)
- A26: BRN/BLK – LG1 – Logic Ground 1
ECU Connector B Pinouts (p72 OBD1)
- B1: YEL/BLK – IGP2 – Ignition Power 2 (to Pin A25)
- B2: BRN/BLK – LG2 – Logic Ground 2 (to Shields for CYP & TDC Sensors)
- B3: (a/t trans only) – (Automatic Transmission Only)
- B4: (a/t trans only) – (Automatic Transmission Only)
- B5: BLU/RED – ACS – A/C Switch Signal
- B6: (empty) – Not Used
- B7: (a/t trans only) – (Automatic Transmission Only)
- B8: GRN – PSPSW – Power Steering Pressure Switch
- B9: BLU/WHT – STARTER SIGNAL – Starter Signal
- B10: ORN – VSS – Vehicle Speed Sensor
- B11: ORN – CYP P – Crankshaft Position Sensor Positive (+)
- B12: WHT – CYP M – Crankshaft Position Sensor Negative (-)
- B13: ORN/BLU – TDC P – Top Dead Center Sensor Positive (+)
- B14: WHT/BLU – TDC M – Top Dead Center Sensor Negative (-)
- B15: BLU/GRN – CKP P – Crankshaft Position Sensor Positive (+)
- B16: BLU/YEL – CKP M – Crankshaft Position Sensor Negative (-)
ECU Connector D Pinouts (p72 OBD1)
- D1: WHT/BLU – VBU – Backup Power
- D2: GRN/WHT – BKSW – Brake Switch Signal
- D3: KS – Knock Sensor Input
- D4: BRN/WHT – SCS – Service Check Signal (Service Connector)
- D5: (empty) – Not Used
- D6: BLU/BLK – VTM – VTEC Pressure Switch
- D7: LT BLU – TXD/RXD – Data Link Connector (DLC) – Diagnostic Data
- D8: (empty) – Not Used
- D9: WHT/RED – ALT F – Alternator Field
- D10: GRN/RED – ELD – Electric Load Detector
- D11: RED/BLK – TPS – Throttle Position Sensor Signal
- D12: YEL/GRN – Not Listed in Original Text (Potentially related to sensors or grounds, needs further verification)
- D13: RED/WHT – ECT – Engine Coolant Temperature Sensor
- D14: WHT/RED – PHO2S – Primary Heated Oxygen Sensor Signal
- D15: RED/YEL – IAT – Intake Air Temperature Sensor
- D16: WHT/BLK – VREF – Voltage Reference (5V)
- D17: WHT/YEL – MAP – Manifold Absolute Pressure Sensor Signal
- D18: (a/t trans only) – (Automatic Transmission Only)
- D19: YEL/WHT – VCC1 – MAP Sensor 5V Supply
- D20: YEL/BLU – VCC2 – TPS Sensor 5V Supply
- D21: GRN/WHT – SG1 – MAP Sensor Ground
- D22: GRN/BLU – SG2 – TPS Sensor Ground
This detailed 1996 Acura Integra Gsr Obd2 Ecu Wire Pinout information is essential for anyone working on the electrical system of this vehicle. Always double-check wire colors and pin locations before making any connections to ensure accuracy and prevent damage to the ECU or other components. Using this guide will help streamline your diagnostic and repair processes, saving you time and ensuring accurate results.
