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Honda OBD1 ECU pinout
This part shows you the OBD1 ECU pinout (locations and wire colors) for all M/T ’92-95
Civic / ’92-95 Integra / ’92-95 Prelude VTEC and NON-VTEC vehicles.
Connector A
Pin number Pin name Description Wire color
1 INJ1 Injector 1 Brown
2 INJ4 Injector 4 Yellow
3 INJ2 Injector 2 Red
4 VTS VTEC solenoid Orange/White
Pin number Pin name Description Wire color
5 INJ3 Injector 3 Light blue
6 PO2SHTC Primary O2 sensor heater control
Civic VX D15Z1: HTCNTL (5-wire O2)
Orange/black
7 FLR Fuel pump relay Civic: Green/Yello
Integra: Green/Blu
8 Empty slot -- --
9 IACV Idle air control valve Green/White
10 Empty slot -- --
11 EGR Exhaust gas recirculation solenoid valve
Civic SOHC or ysed for H22/H23 EGR
Red or Orange/Blu
12 FANC Radiator fan control Yellow/Green
13 MIL Malfunction indicator light Green/Orange
14 Empty slot -- --
15 ACC A/C compressor clutch Black/Red
16 ALTC Alternator control White/Green
17 IAB Intake air bypass
(Integra GSR B18C)
Pink
18 TCM Transmission control module
Empty slot for 5SPD Civic and Integra
19 ICS Intake control solenoid (H22A)
Empty slot for Civic and Integra
White
20 PCS Evap purge control solenoid valve Red
21 ICM Ignition control module Red/Green
22 ICM Ignition control module
Note: Depin this when using an OBD1 AEM EMS
Red/Green
23 PG1 Power ground Black
Pin number Pin name Description Wire color
24 PG2 Power ground Black
25 IGP2 Power source Yellow/Black
26 LG1 Logic ground Black/Red
Connector B
Pin number Pin name Description Wire color
1 IGP1 Power ground Yellow/Black
2 LG2 Logic ground Brown/Black
3 TCM Transmission control module
Empty slot for 5SPD Civic and Integra
4 TCM Transmission control module
Empty slot for 5SPD Civic and Integra
5 ACS A/C Switch signal Blue/Red
6 Empty slot -- --
7 M/T Clutch switch (Civic VX only)
Also used for A/T function
Pink/Black or Green (A/T
8 PSPSW P/S power switch signal
Empty slot for Civic CX/DX/LX/EX/Si
Empty slot for Integra
Red/Green
9 STS Starter signal switch STS
Pin number Pin name Description Wire color
TMA/FAS Transmission related - Civic: Blue/White
- Integra: Blue/Red
TMA/FAS
- Civic: Grey
- Integra: Yellow
10 VSS Vehicle speed sensor Yellow or Blue/Orange
11 CYP P Cylinder position sensor side P (detection) Orange
12 CYP M Cylinder position sensor side M (ground) White
13 TDC P Top dead center sensor side PP(detection) Orange/Blue
14 TDC M Top dead center sensor side M (ground) White/Blue
15 CKP P Crankshaft position sensor side P (detection) Blue/Yellow
16 CKP M Crankshaft position sensor side M (ground) Blue/Yellow
Connector D
Pin
number
Pin name Description Color
1 VBU Voltage back up White/Blue or
White/Yellow
2 BKSW Brake switch Green/White
3 KS Knock sensor
Empty slot for Civic CX/DX/EX/Si
Red/Blue
Pin
number
Pin name Description Color
Civic VX D15Z1: LAF sensor (5-wire
O2)
4 SCS Service check signal Civic: Brown
Integra: Brown/White
5 Empty slot -- --
6 VTPS/VTM VTEC pressure switch Orange/Blue or Light
7 TXD/RXD Diagnostic data link Light blue or Light
green/Red
8 LAF sensor (5-wire O2) VS+ Only Civic VX D15Z1, others are empty --
9 ALT FR Alternator FR charge signal Pink or White/Red
10 EL (ELD) Electrical load detector Green/Red or Green/B
11 TPS Throttle position sensor Light green or Red/b
12 EGRL EGR valve lift sensor (only Civic VX) White/Black
13 ECT Engine coolant temp sensor Red/white or Yellow/
14 PHO2 Primary heated O2
Civic CX D15B8: 1-wire O2
Civic VX D15Z1: LAF sensor (5-wire
O2) IP+
White or White/Red
15 IAT Intake air temp Red/Yellow
16 LAF sensor (5-wire O2) IP-,
VS-
Only Civic VX D15Z1
Empty slot for the others
Blue/Green
17 MAP Manifold absolute pressure sensor Civic: White
Integra: White/Blue
18 Inter lock control unit (A/T related)
Civic CX/VX optional up-shift LT
Empty slot for the others
White/Red
Pink/Green
19 VCC1 Sensor voltage for MAP Civic: Yellow/Green
Integra: Red/white
Pin
number
Pin name Description Color
20 VCC2 Sensor voltage for TPS Yellow/White
21 SG1 Sensor ground 1 Civic: Green/Blue
Integra: Blue/White
22 SG2 Sensor ground 2 Green/White
Edit
GM OBD1 pinout
Ford OBD1 pinout
Pin number Description
1 Fuel pump enable output
2 Not used
3 Malfunction indictor lamp (MIL) output
4 K diagnostic line
Data +
5 Data -
6 L diagnostic line
Sensor signal return

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Obd1 pinout of honda, gm, ford

  • 1. Honda OBD1 ECU pinout This part shows you the OBD1 ECU pinout (locations and wire colors) for all M/T ’92-95 Civic / ’92-95 Integra / ’92-95 Prelude VTEC and NON-VTEC vehicles. Connector A Pin number Pin name Description Wire color 1 INJ1 Injector 1 Brown 2 INJ4 Injector 4 Yellow 3 INJ2 Injector 2 Red 4 VTS VTEC solenoid Orange/White
  • 2. Pin number Pin name Description Wire color 5 INJ3 Injector 3 Light blue 6 PO2SHTC Primary O2 sensor heater control Civic VX D15Z1: HTCNTL (5-wire O2) Orange/black 7 FLR Fuel pump relay Civic: Green/Yello Integra: Green/Blu 8 Empty slot -- -- 9 IACV Idle air control valve Green/White 10 Empty slot -- -- 11 EGR Exhaust gas recirculation solenoid valve Civic SOHC or ysed for H22/H23 EGR Red or Orange/Blu 12 FANC Radiator fan control Yellow/Green 13 MIL Malfunction indicator light Green/Orange 14 Empty slot -- -- 15 ACC A/C compressor clutch Black/Red 16 ALTC Alternator control White/Green 17 IAB Intake air bypass (Integra GSR B18C) Pink 18 TCM Transmission control module Empty slot for 5SPD Civic and Integra 19 ICS Intake control solenoid (H22A) Empty slot for Civic and Integra White 20 PCS Evap purge control solenoid valve Red 21 ICM Ignition control module Red/Green 22 ICM Ignition control module Note: Depin this when using an OBD1 AEM EMS Red/Green 23 PG1 Power ground Black
  • 3. Pin number Pin name Description Wire color 24 PG2 Power ground Black 25 IGP2 Power source Yellow/Black 26 LG1 Logic ground Black/Red Connector B Pin number Pin name Description Wire color 1 IGP1 Power ground Yellow/Black 2 LG2 Logic ground Brown/Black 3 TCM Transmission control module Empty slot for 5SPD Civic and Integra 4 TCM Transmission control module Empty slot for 5SPD Civic and Integra 5 ACS A/C Switch signal Blue/Red 6 Empty slot -- -- 7 M/T Clutch switch (Civic VX only) Also used for A/T function Pink/Black or Green (A/T 8 PSPSW P/S power switch signal Empty slot for Civic CX/DX/LX/EX/Si Empty slot for Integra Red/Green 9 STS Starter signal switch STS
  • 4. Pin number Pin name Description Wire color TMA/FAS Transmission related - Civic: Blue/White - Integra: Blue/Red TMA/FAS - Civic: Grey - Integra: Yellow 10 VSS Vehicle speed sensor Yellow or Blue/Orange 11 CYP P Cylinder position sensor side P (detection) Orange 12 CYP M Cylinder position sensor side M (ground) White 13 TDC P Top dead center sensor side PP(detection) Orange/Blue 14 TDC M Top dead center sensor side M (ground) White/Blue 15 CKP P Crankshaft position sensor side P (detection) Blue/Yellow 16 CKP M Crankshaft position sensor side M (ground) Blue/Yellow Connector D Pin number Pin name Description Color 1 VBU Voltage back up White/Blue or White/Yellow 2 BKSW Brake switch Green/White 3 KS Knock sensor Empty slot for Civic CX/DX/EX/Si Red/Blue
  • 5. Pin number Pin name Description Color Civic VX D15Z1: LAF sensor (5-wire O2) 4 SCS Service check signal Civic: Brown Integra: Brown/White 5 Empty slot -- -- 6 VTPS/VTM VTEC pressure switch Orange/Blue or Light 7 TXD/RXD Diagnostic data link Light blue or Light green/Red 8 LAF sensor (5-wire O2) VS+ Only Civic VX D15Z1, others are empty -- 9 ALT FR Alternator FR charge signal Pink or White/Red 10 EL (ELD) Electrical load detector Green/Red or Green/B 11 TPS Throttle position sensor Light green or Red/b 12 EGRL EGR valve lift sensor (only Civic VX) White/Black 13 ECT Engine coolant temp sensor Red/white or Yellow/ 14 PHO2 Primary heated O2 Civic CX D15B8: 1-wire O2 Civic VX D15Z1: LAF sensor (5-wire O2) IP+ White or White/Red 15 IAT Intake air temp Red/Yellow 16 LAF sensor (5-wire O2) IP-, VS- Only Civic VX D15Z1 Empty slot for the others Blue/Green 17 MAP Manifold absolute pressure sensor Civic: White Integra: White/Blue 18 Inter lock control unit (A/T related) Civic CX/VX optional up-shift LT Empty slot for the others White/Red Pink/Green 19 VCC1 Sensor voltage for MAP Civic: Yellow/Green Integra: Red/white
  • 6. Pin number Pin name Description Color 20 VCC2 Sensor voltage for TPS Yellow/White 21 SG1 Sensor ground 1 Civic: Green/Blue Integra: Blue/White 22 SG2 Sensor ground 2 Green/White Edit GM OBD1 pinout
  • 7. Ford OBD1 pinout Pin number Description 1 Fuel pump enable output 2 Not used 3 Malfunction indictor lamp (MIL) output 4 K diagnostic line Data + 5 Data - 6 L diagnostic line Sensor signal return