Honda OBD0/OBD1 ECU Pinouts

Honda OBD0/OBD1 Pinouts

OBD0 PM6 SI ECU PINOUT 88-91 CIVIC SI,CRX SI & 90-91 INTEGRA

 

CONNECTOR "A"

 

1.   Injector 1 Brown

2.   Main Relay Ground Black 1

3.   Injector 2 Red Red

4.   Main Relay Ground Black 2

5.   Injector 3 Light Blue

6.   Purge Cut Off Solenoid Valve Green

7.   Injector 4 Yellow 1

8.   ------------------------

10. ------------------------

11. EAC/IACV - (Electronic Air Control/Idle Air Control Valve) Blue/Yellow

12. Main Relay Green/Black 2

13. Main Relay Injector Resistor Box Yellow/Black 2

14. Main Relay Green/Black 1

15. Main Relay Injector Resistor Box Yellow/Black 1

16. Ground Brown/Black

17. ------------------------

18. Ground Black/Red

 

CONNECTOR "B"

 

1.   Hazard Fuse White/Green

2.   Fast Idle Control Valve Blue 1

3.   A/C Clutch Relay Yellow

4.   Crank Angle Sensor Orange

5.   Alternator White/Yellow

6.   Check Engine Warning Light Green/Orange

7.   ------------------------

8.   A/C Switch Blue/Red

9.   ------------------------

10. Crank Angle Sensor Orange

11. ------------------------

12. Crank Angle Sensor White

13. Main Relay Blue/White

14. Alternator Blue 2

15. Igniter Unit White 1

16. Speed Sensor Yellow

17. Igniter Unit White 2

18. ------------------------

19. Electric Load Detector Green/Red

20. Ignition Timing Adjusting Connector Brown

 

CONNECTOR "C"

1.   Cylinder Position Sensor Blue/Green

2.   Cylinder Position Sensor Blue/Yellow

3.   TDC - (Top Dead Center Sensor) Orange/Blue

4.   TDC - (Top Dead Center Sensor) White/Blue

5.   TA Sensor - (Intake Air Temp Sensor) Red/Yellow

6.   TW Sensor - (Thermal Water Sensor) Red/White 1

7.   TPS - (Throttle Position Sensor)  Red/Blue

8.   ------------------------

9.   PA Sensor - (Atmospheric Pressure Sensor) Red/White 2

10. Brake Switch Green/White 3

11. MAP Sensor White 1

12. PA Sensor/Ignition Timing Adjusting Connector/TA Sensor/TPS Sensor/TW Sensor Green/White 2

13. PA Sensor/TPS Sensor Yellow/White

14. MAP Sensor Green/White 1

15. MAP Sensor Yellow/Red

16. O2 Sensor - (Oxygen Sensor) White 3

OBD 1 ECU PINOUT CIVIC 92-95 & INTEGRA

 

CONNECTOR "A"

 

1.  Injector 1 Brown
2.  Injector 4 Yellow
3.  Injector 2 Red
4.  VTS-VTEC Solenoid
     Civic: Green/Yellow
     Integra: Green/Blue
5.  Injector 3 Light Blue
6.  PO2SHTC - (Primary O2 Sensor Heating Element) Orange/White -- Civic VX D15Z1: HTCNTL (5 Wire O2)
7.  FLR - (Fuel Pump Relay)
     (Civic) Green/Yellow
     (Integra) Green/Blue
8.  ------------------------
9.  IACV - ( Idle Air Control Valve Green/White
10. ------------------------
11. EGR - (Exhaust Gas Recirculation Valve) Red or Orange/Blue
12. FANC - (Radiator Fan Control) Yellow/Green
13. MIL - (Malfunction Indicator Light) Green/Orange
14  ------------------------
15. ACC (A/C Compressor Clutch) Black/Red
16. ALTC - Alternator Control White/Green
17. IAB - (Intake Air Bypass Control Solenoid Valve) Integra GSR B18C Pink
18. TCM- (Transmission Control Module) (A/T Related) Empty Slot For 5-spd Civic/Integra
19. ICS - (Intake Control Solenoid) H22A White -- Empty Slot For Civic/Integra
20. PCS - (Evap Purge Control Solenoid Valve) Red
21. ICM - (Ignition Control Module) Red/Green
22. ICM - (Ignition Control Module) Red/Green "De-pin If Using OBD1 AEM EMS"
23. PG1 - (Power Ground) Black
24. PG2 - (Power Ground) Black
25. IGP2 - (12v Power Source) Yellow/Black
26. LG1 - (Logic Ground) Black/Red

 

CONNECTOR "B"

 

1.  IGP1 - (Power Ground) Yellow/Black
2.  LG2 - (Logic Ground) Brown/Black
3.  A/T Related Empty Slot For 5-spd Civic/Integra
4.  A/T Related Empty Slot For 5-spd Civic/Integra
5.  ACS - (A/C Switch Signal) Blue/Red
6.  ------------------------
7.  M/T Clutch Switch (Civic VX Only) Also Used For A/T Function
8.  PSPSW - (Power Steering Power Switch Signal) Red/Green (Integra & Civic SI/EX)
9.  STS - (Starter Signal Switch)
     (Civic) Blue/White
     (Integra) Blue/Red
10. VSS - (Vehicle Speed Sensor) Yellow/Blue .. Can Also Be Orange
11. CYP P - (CYP Sensor) (P Side Input) Orange
12. CYP M - CYP M - (CYP Ground) (M Side Signal) White
13. TDC P - (Top Dead Center Ground) (P Side Input) Orange/Blue
14. TDC M - (Top Dead Center Ground) (M Side Signal) White/Blue
15. CKP P - (Crank Position Ground) (P Side Input) Blue/Yellow
16. CKP M - (Crank Position Ground) Blue/Yellow

 

CONNECTOR "D"

 

1.  VBU - (Voltage Backup) White/Blue or White/Yellow
2.  BKSW - (Brake Switch) Green/White
3.  KS - (Knock Sensor) (Integra/Civic/DelSol) Integra: Red/Blue 
     Empty Slot For Civic CX/DX/EX/SI
     Civic VX D15Z1: LAF Sensor (5 Wire O2)
4.  SCS - (Service Check Signal)
     (Civic) Brown
     (Integra) Brown/White
5.   ------------------------
6.   VTPS/VTM - (VTEC Pressure Switch) Blue or Light Blue
7.   TXD/RXD - (Diagnostic Data Link) Light Blue or Light Green/Red
8.   Empty Slot Civic/Integra Except Civic VX D15z1: LAF Sensor (5 Wire O2) VS+
9.   ALT FR - (Alternator FR Charge Signal) Pink or White/Red
10. ELD - (Electrical Load Detector) Green/Red or Green/Black
11. TPS - (Throttle Position Sensor) Light Green or Red/Black
12. EGRL - (EGR Valve Lift Sensor) Civic VX: White/Black "Empty Slot With Other Models"
13. ECT (Engine Coolant Temp Sensor) Red/White or Yellow/Blue
14. PHO2S - (Primary Heated O2 Sensor) White or White/Red 
     Civic D15B8: (1 Wire O2)
     Civic VX D15Z1: LAF Sensor (5 Wire O2)
15. IAT - (Intake Air Temperature Sensor) Red/Yellow
16. Civic/Integra: Empty Slot
     Civic VX D15Z1: LAF Sensor (5 Wire O2) IP-,VS- Blue/Green
17. MAP - (Map Sensor)
     (Civic): White
     (Integra): White/Blue
18. Interlock Control Unit (A/T Related)
     White/Red 
     Civic CX,VX Optional Up-Shift LT Pink/Green "Empty Slot With Other Models"
19. VCC1 - (Sensor Voltage For MAP)
     (Civic): Yellow/Green
     (Integra): Red/White
20. VCC2 - (Sensor Voltage For TPS)
      Yellow/White
21. Sensor Ground
     (Civic): Green/Blue
     (Integra): Blue/White
22. SG2 Sensor Ground Green/White