2001-2003 Honda Civic ECU Wiring

[Forum Bot]

2001-2003 Honda Civic ECU Wiring Connector A (31 Pins) 1-blk/wht-Primary O2 sensor heater control 2-yel/blk-Power Source 3-yel/blk-Power source 4-blk-Power ground 5-blk-Power ground 6-wht-Primary O2 sensor 7-blu-Crankshaft position 8-yel-Sensor return volt 9-red/blu-Knock sensor 10-grn/yel-Sensor ground 11-grn/wht-Sensor ground 12-blk/red-Idle air control valve 13-wht/blk-EGR Valve position VTEC ONLY 14-blk/wht-Secondary O2 sensor heater control 15-red/blk-Throttle position sensor 18-wht/grn-Vehicle speed sensor 19-grn/red-MAP Sensor 20-yel/blu-Sensor Voltage Supply 21-yel/red-Sensor Voltage Supply 23-brn/yel-Logic ground 24-brn/yel-logic ground 25-wht/red-Secondary O2 Sensor 26-grn-Top dead center sensor 27-brn-Igniton coil 4 28-wht/blu-coil 3 29-blu/red-coil 2 30-yel/grn-coil 1 Connector B (24 Pins) 2-yel-Fuel injector 4 3-blu-Injector 3 4-red-Injector 2 5-brn-Injector 1 6-grn-Radiator fan control 7-red/blk-A/T Pressure control solenoid valve A 8-red/wht-Engine Coolant sensor 9-blu/blk-VTEC Oil pressure switch VTEC ONLY 10-wht/blu-Alternator L Signal 13-wht/red-Alternator FR Signal 14-blu/red-EGR Valve VTEC ONLY 15-grn/yel-VTEC Solenoid valve 16-blk/red-A/T Pressure control solenoid valve B 17-red/yel-Intake air temp sensor 18-wht/grn-Alternator control 21-yel/blu-EVAP Canistor purge valve Connector C (22 Pins)– AUTO TRANSMISSION ONLY 1-wht/blk-A/T Pressure control solenoid valve A 2-yel/blu-Torque converter clutch solenoid 4-grn/wht-Shift solenoid B 6-blu/blk-Shift Solenoid A 7-wht/red-Mainshaft speed sensor 8-brn/wht-A/T Pressure control solenoid valve B 9-red-Position switch D3 10-wht-position switch R 11-blu-position switch 2 12-blu/wht-position switch neutral or park 14-grn-countershaft speed sensor ground 15-blu-countershaft speed sensor 18-blu/yel-position switch D3 or D 20-yel-position switch D 21-wht/grn-mainshaft speed sensor ground Connector E (31 pins) 1-grn/yel-Immobilizer fuel pump relay 2-wht/red-Secondary O2 Sensor EX Only 3-brn/yel-Logic ground 4-pnk-Sensor ground 5-yel/blu-Sensor voltage source 6-blk/wht-Secondary O2 sensor heater control EX Only 7-red/yel-PGM-FI main relay 1 9-yel/blk-Ignition input signal 12-blu/orn-Cruise control signal 13-wht/blu-Interlock control unit 14-lt grn-Fuel tank pressure sensor 15-grn/red-Electrical load detector 16-lt grn/blk-Power steering pressure switch 18-red-A/C Clutch 20-blu/red-EVAP bypass solenoid valve 21-lt grn/red-EVAP Canister shut valve 22-wht/blk-Brake pedal position switch 23-lt blu-K line 24-yel-Multiplex control unit comm line 26-blu-Engine speed pulse 27-red/blu-Immobilizer code 29-brn-Service check signal 30-red/wht-Write enable signal 31-grn/orn-MIL or check engine light enable

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[andyman97]

Some of these pins are different between the different motors and ecus.