PCM Harness Resistance
WARNING: This page is about a different car, the 1998 GMC Pickup and 1998 Chevrolet Pickup. However, it is still accessible from the selected car via links, so may be relevant.
Turn ignition switch to LOCK position. Disconnect PCM and appropriate component harness connectors. Check for open or short circuits between appropriate PCM harness connector terminal and appropriate component harness connector terminal. See POWERTRAIN CONTROL MODULE (PCM) table. See WIRING DIAGRAMS. If harness is open or shorted, repair as necessary.
POWERTRAIN CONTROL MODULE (PCM) (1)
| Connector | Terminal | Wire Color | Function | ||
|---|---|---|---|---|---|
| C1 | 1 & 2 | ***** | Not Used | ||
| C1 | 3 | BRN/WHT | CMP 1x Signal | ||
| C1 | 4-6 | ***** | Not Used | ||
| C1 | 7 | TAN | HO2S Bank 2 Sensor 1 Low | ||
| C1 | 8 | PNK/BLK | CMP Sensor Ground | ||
| C1 | 9 | PPL | Fuel Level Output | ||
| C1 | 10 | TAN/BLK | TCC Solenoid Control | ||
| C1 | 11 & 12 | ***** | Not Used | ||
| C1 | 13 | WHT | 3-2 Shift Solenoid Valve Control | ||
| C1 | 14 | ***** | Not Used | ||
| C1 | 15 | YEL/BLK | VSS Output | ||
| C1 | 16-18 | ***** | Not Used | ||
| C1 | 19 | PPL/WHT | HO2S High Bank 1 Sensor 1 Signal | ||
| C1 | 20 | PPL | Not Used | ||
| C1 | 21 | PPL | HO2S High Bank 2 Sensor 1 Signal | ||
| C1 | 22 | PPL/WHT | HO2S High Bank 1 Sensor 3 Signal | ||
| C1 | 23 | ***** | Not Used | ||
| C1 | 24 | TAN | Not Used | ||
| C1 | 25 | TAN/WHT | HO2S Low Bank 1 Sensor 1 Ground | ||
| C1 | 26 | TAN/WHT | HO2S Low Bank 1 Sensor 3 Ground | ||
| C1 | 27 | ***** | Not Used | ||
| C1 | 28 | PPL | CKP Sensor Ground | ||
| C1 | 29 | LT GRN/BLK | VSS Low | ||
| C1 | 30 | PPL/WHT | VSS High | ||
| C1 | 31 | YEL | CKP 3x Sensor Signal | ||
| C1 | 32 | ***** | Not Used | ||
| C2 | 1 | ***** | Not Used | ||
| C2 | 2 | WHT | EVAP Canister Vent Solenoid Control | ||
| C2 | 3-5 | ***** | Not Used | ||
| C2 | 6 | LT GRN | 2-3 Shift Solenoid Control | ||
| C2 | 7 | GRN | TCC PWM Solenoid Control | ||
| C2 | 8 | BLK | Fuel Injector No. 1 Control | ||
| C2 | 9 | YEL/BLK | Fuel Injector No. 6 Control | ||
| C2 | 10 | BRN | EGR Pintle Position Signal | ||
| C2 | 11 & 12 | ***** | Not Used | ||
| C2 | 13 | LT GRN/WHT | IAC Coil B High | ||
| C2 | 14 | LT BLU/WHT | IAC Coil A High | ||
| C2 | 15 | LT GRN/BLK | Fuel Injector No. 2 Control | ||
| C2 | 16 | PNK/BLK | Fuel Injector No. 3 Control | ||
| C2 | 17 & 18 | ***** | Not Used | ||
| C2 | 19 | DK BLU | KS Signal | ||
| C2 | 20 | ***** | Not Used | ||
| C2 | 21 | LT GRN | MAP Sensor Signal | ||
| C2 | 22 | TAN | IAT Sensor Signal | ||
| C2 | 23 | YEL | ECT Sensor Signal | ||
| C2 | 24 | DK BLU | TP Sensor Signal | ||
| C2 | 25 | DK GRN | Fuel Tank Pressure Sensor Signal | ||
| C2 | 26 | ***** | Not Used | ||
| C2 | 27 | YEL/BLK | TFT Sensor Signal | ||
| C2 | 28 | YEL | MAF Sensor Signal | ||
| C2 | 29 | LT GRN/BLK | IAC Coil B Low | ||
| C2 | 30 | LT BLU/BLK | IAC Coil A Low | ||
| C2 | 31 | BLK/WHT | Fuel Injector No. 5 Control | ||
| C2 | 32 | LT BLU/BLK | Fuel Injector No. 4 Control | ||
| C3 | 1 | ***** | Not Used | ||
| C3 | 2 | DK GRN/WHT | EVAP Canister Purge Solenoid Control | ||
| C3 | 3 | ***** | Not Used | ||
| C3 | 4 | BLK | ECT/TP Sensor Ground | ||
| C3 | 5 | ***** | Not Used | ||
| C3 | 6 | RED/BLK | Pressure Control Solenoid High | ||
| C3 | 7 & 8 | ***** | Not Used | ||
| C3 | 9 | WHT | IC Control | ||
| C3 | 10 | ***** | Not Used | ||
| C3 | 11 | RED | Transmission Range C Signal | ||
| C3 | 12 | GRY | TP Sensor 5 Reference Voltage | ||
| C3 | 13 | PPL/WHT | Fuel Level Input | ||
| C3 | 14 & 15 | ***** | Not Used | ||
| C3 | 16 | LT BLU/WHT | Pressure Control Solenoid Low | ||
| C3 | 17 | BLK/WHT | VCM Ground | ||
| C3 | 18 | BLK/WHT | VCM Ground | ||
| C3 | 19 | BLK | IAT/MAP/EGR/Fuel Tank Pressure Ground | ||
| C3 | 20 | ***** | Not Used | ||
| C3 | 21 | ORG | Battery Voltage | ||
| C3 | 22 | DK BLU | Transmission Range B Signal | ||
| C3 | 23 | PNK | Transmission Range A Signal | ||
| C3 | 24-26 | ***** | Not Used | ||
| C3 | 27 | GRY | Fuel Tank Pressure EGR/MAP 5 Volt Reference | ||
| C3 | 28-32 | ***** | Not Used | ||
| C4 | 1 | DK GRN/WHT | Fuel Pump Relay Control | ||
| C4 | 2 | ***** | Not Used | ||
| C4 | 3 | DK GRN/WHT | VSS Output Signal (Radio & Cruise) | ||
| C4 | 4 | DK GRN | VSS Output Signal (Speedometer) | ||
| C4 | 5 | BRN/WHT | MIL Control | ||
| C4 | 6-9 | ***** | Not Used | ||
| C4 | 10 | PPL | Brake Signal | ||
| C4 | 11 | PPL | Serial Data (Class II) | ||
| C4 | 12 | ***** | Not Used | ||
| C4 | 13 | BRN | Ignition Positive Voltage | ||
| C4 | 14-15 | ***** | Not Used | ||
| C4 | 16 | RED | Ignition Positive Voltage | ||
| C4 | 17 | ***** | Not Used | ||
| C4 | 18 | PNK | Ignition Positive Voltage | ||
| C4 | 19 | BLK/WHT | 4WD Engaged Signal | ||
| C4 | 20 | WHT | EGR Valve Control | ||
| C4 | 21-22 | ***** | Not Used | ||
| C4 | 23 | GRY/BLK | Transfer Case High/Low Switch | ||
| C4 | 24 | LT BLU/BLK | Cruise Engaged Signal | ||
|
|||||