Pin Voltage Chart
ECM TERMINAL IDENTIFICATION & WIRE COLORS
| Wire Color | Terminal Number | Function/ Description | Voltage Value (DC Volts) (Unless Otherwise Specified) |
|---|---|---|---|
| White | 1 | Ignition Signal | KOER - .2-.3V At Idle |
| " | " | " | KOER - .5 At 2000 RPM |
| Yellow/Red | 2 | Ignition Signal | KOER - 12.0V At Idle |
| Blue/Black | 3 | Tachometer | KOER - About .9V At Idle |
| Green | 4 | ECCS Relay | Turn Ignition Off - 0-1.0V For First 2 Seconds, 12.0V After First 2 Seconds |
| Blue/White | 7 | A/T Check Signal | KOER - 1.0-8.0V At Idle |
| Black/ Yellow | 8 | Fuel Pump Relay | KOEO - .7-.9V For First 5 Seconds, 11.0-14.0V After First 5 Seconds |
| Lt. Green/ Red | 9 | Triple Pressure Switch | KOER - 5.0V |
| Black | 10 | ECCS Ground | At Idle - Zero Volts |
| Blue | 13 | Radiator Fan (High Speed) | KOER, Cool Engine - 11.0-14.0V |
| Black/Blue | 14 | Radiator Fan (High Speed) | KOER, Cool Engine - 11.0-14.0V |
| Yellow/Blue | 15 | A/C Relay | A/C Switch Off - 11.0-14.0V |
| " | " | " | A/C Switch On - .8-.11V |
| Blue Orange | 18 | MIL | KOER - 11.0-14.0V |
| Black | 19 | ECCS Ground | At Idle - Zero Volts |
| Purple | 20 | Start Signal | KOEC - 11.0-14.0V |
| Lt./Green Black | 21 | A/C Switch | KOER, A/C On - 0V |
| " | " | " | KOER, A/C Off, 11.0-14.0 |
| Brown/ White | 22 | Inhibitor Switch (A/T) | KOEO, In Park - 0V |
| " | " | " | KOEO, Except Park - 11.0-14.0V |
| Brown/ White | 22 | Neutral Switch (M/T) | KOEO - In Neutral - 0V |
| " | " | " | KOEO, Except Neutral - 11.0-14.0V |
| White | 23 | Throttle Position Sensor | KOEO - Pedal Released - .45-.55V |
| " | " | " | KOEO - Pedal Released - Approximately 4.0V |
| White/Red | 24 | A/T Signal No. 1 | KOER, 6.0-8.0V |
| Green/ Yellow | 25 | Power Steering Pressure Switch | KOER - Wheels Turned - 0V |
| " | " | " | KOER, Wheels Straight - About 5V |
| Yellow/ Green | 26 | Vehicle Speed Sensor | Front Wheels Rotating - About 5V |
| White/Blue | 29 | A/T Signal No. 2 | KOER, 6.0-8.0V |
| White/ Black | 30 | A/T Signal No. 3 | KOER, 0V |
| Blue/ Yellow | 33 | Throttle Position Sensor | KOEO - Pedal Released - About .4V |
| " | " | " | KOEO - Pedal Released - Approximately 4.0V |
| Black/Red | 38 | Ignition Switch | Ignition Switch Off - 0V |
| " | " | " | Ignition Sw. On - 11.0-14.0V |
| Black | 39 | ECCS Ground | At Idle - Zero Volts |
| Yellow | 40 | CMP Sensor | KOER - .2-.5V |
| Blue | 41 | CMP Sensor | KOER - 2-3V |
| Green/ Yellow | 43 | Power Steering Pressure Switch | KOER, Wheels Turned 0V |
| " | " | " | KOER, Wheels Straight 7.0-10.0 |
| Lt. Green/ | 44 | A/C Switch | KOER, A/C On - 0V |
| Orange | 46 | Front Oxygen Sensor | KOER, .2-1.0V |
| Orange | 47 | Mass Airflow Sensor | KOER - 1.3-1.7V At Idle |
| " | " | " | KOER - 1.7-2.1V At 2000 RPM |
| White | 48 | Mass Airflow Sensor Ground | KOER, .005-.02V At Idle |
| Yellow/ Yellow | 49 | Throttle Position Sensor | KOEO, Pedal Released - About 5V |
| " | " | " | KOEO, Pedal Released - Approximately 4.0V |
| Black | 50 | Sensor Ground | At Idle - .001-.010V |
| Blue/Orange | 51 | Coolant Temp. Sensor | KOER, 0-5.0V, Varies With Temperature |
| White | 52 | Rear Oxygen Sensor | KOER, 0-1.5V |
| Blue | 53 | CKP Sensor | KOER, More than .2V AC |
| White | 54 | Knock Sensor | KOER, 2.0-3.0V |
| Orange | 56 | ECM Power Supply | Ignition On - 11.0-14.0V |
| Orange | 58 | Data Link Conn. | Ignition On - 11.0-14.0V |
| Orange | 61 | ECM Power Supply | Ignition On - 11.0-14.0V |
| White | 62 | EGR Temperature Sensor | At Idle - Less Than 4.5V EGR Operating - 0-1V |
| Blue/Orange | 63 | Intake Air Temperature Sensor | KOER 0-5V, Varies With Temperature |
| Yellow/ Black | 64 | Data Link Connector | KOER - 11.0-14.0V At Idle |
| Yellow/ Red | 65 | Data Link Connector | KOER - 11.0-14.0V At Idle |
| Yellow/ White | 68 | Data Link Connector | KOER - 11.0-14.0V At Idle |
| Orange | 70 | Power Supply Back-Up | Ignition Off - 11.0-14.0V |
| Lt. Blue | 101 | IACV-AAC Valve | KOER, Normal Idle - 5.0-14.0V |
| " | " | " | KOER, Increased Idle Demand 5.0-9.0V |
| Brown | 102 | Injector No. 1 | KOER - 11.0-14.0V |
| Purple | 103 | EGR & Canister Control Solenoid | KOER - 11.0-14.0V At 2000 RPM |
| " | " | " | KOEO - .6-.8V At 4000 RPM |
| Brown/ Yellow | 109 | Injector No. 3 | KOEO - 11.0-14.0V |
| Black | 111 | Rear Oxygen Sensor | KOER, About .2V |
| Black | 112 | ECCS Ground | At Idle - Zero Volts |
| White | 113 | Current Return | KOEO - 11.0-14.0V |
| Yellow | 115 | Front Oxygen Sensor | KOER, Less Than 3200 RPM |
| " | " - KOEO - Key On Engine Off. | " | KOER, Greater Than 3200 RPM - 11.0-14.0V |
| - KOER - Key On Engine Running. | |||