Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET1998TRACKER 2D UTILITY, RWD, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROL SYSTEM & ENGINE COMPONENT TESTS - 1.6LCOMPUTERIZED ENGINE CONTROLSPOWERTRAIN CONTROL MODULE (PCM)PCM HARNESS RESISTANCE
1998 Chevrolet Tracker 2D Utility, RWD, Automatic
PCM Harness Resistance
1998 Chevrolet Tracker 2D Utility, RWD, AutomaticSECTION PCM Harness Resistance
Disconnect PCM harness connectors. Check for open or short circuits between PCM harness connector and component harness connector. See PCM CIRCUITS table. See WIRING DIAGRAMS . If harness is open or shorted, repair as necessary.
PCM CIRCUITS (M/T OR 3-SPEED A/T) (1)
| Connector/Terminal No. | Wire Color | Function | ||
|---|---|---|---|---|
| A/1 | BRN/RED | Fuel Tank Sensor Input | ||
| A/2 | RED/BLU | HO2S No. 1 Signal | ||
| A/3 | YEL/RED | Fuel Level Input | ||
| A/4 | RED/YEL | ECT Sensor Input | ||
| A/5 | GRY/RED | Reference Voltage | ||
| A/6 | RED/BLK | IAT Sensor Input | ||
| A/7 | ***** | Not Used | ||
| A/8 | ***** | Not Used | ||
| A/9 | GRY/BLK | MAF Sensor Input | ||
| A/10 | YEL | HO2S No. 2 Signal | ||
| A/11 | GRY | TP Sensor Input | ||
| A/12 | ***** | Not Used | ||
| A/13 | BRN/YEL | MAP Sensor Input | ||
| A/14 | BLU/WHT | CTP Switch Signal | ||
| A/15 | ***** | Not Used | ||
| A/16 | ***** | Not Used | ||
| B/1 | BLK/ORG | Ground | ||
| B/2 | BLK/ORG | Ground | ||
| B/3 | WHT | CMP Sensor | ||
| B/4 | ***** | Not Used | ||
| B/5 | YEL/RED | Fuel Gauge Ground | ||
| B/6 | GRN/WHT | EVAP Canister Vent Valve Control | ||
| B/7 | GRN/BLU | EVAP Tank Pressure Control Solenoid Vacuum Valve Control | ||
| B/8 | ***** | Not Used | ||
| B/9 | PNK/WHT | HO2S Sensor No. 2 Control | ||
| B/10 | ***** | Not Used | ||
| B/11 | RED | Fuel Injector No. 1 Control | ||
| B/12 | LT GRN/BLK | IAC Valve Control | ||
| B/13 | WHT/GRN | Fuel Injector No. 3 Control | ||
| B/14 | BLK/GRN | PCM Ground | ||
| B/15 | BRN | Sensor Ground | ||
| B/16 | ORG/BLK | Ignition Reference High (CKP Sensor) | ||
| B/17 | WHT/BLU | Ignition Reference Low (CKP Sensor) | ||
| B/18 | ***** | Not Used | ||
| B/19 | ***** | Not Used | ||
| B/20 | ***** | Not Used | ||
| B/21 | GRN/WHT | Brake Light Switch (A/T Only) | ||
| B/22 | PPL/GRN | Serial Data Output | ||
| B/23 | PNK | HO2S Sensor No. 1 Heater Control | ||
| B/24 | LT GRN/RED | Fuel Injector No. 2 Control | ||
| B/25 | LT GRN/YEL | EVAP Canister Purge Valve Control | ||
| B/26 | WHT/BLK | Fuel Injector No. 4 Control | ||
| C/1 | WHT | Battery Voltage | ||
| C/2 | BLK/YEL | Starter Signal | ||
| C/3 | PPL | Duty Cycle Output | ||
| C/4 | ORN | Ignition Control Module Output | ||
| C/5 | PNK | Fuel Pump Relay Control | ||
| C/6 | BLU/RED | Test Switch Signal | ||
| C/7 | YEL | VSS Input | ||
| C/8 | ***** | Not Used | ||
| C/9 | YEL/BLK | A/C ON Signal | ||
| C/10 | BLU | Main Relay Control | ||
| C/11 | ***** | Not Used | ||
| C/12 | BLU/BLK | Ignition Voltage | ||
| C/13 | BLU/BLK | Ignition Voltage | ||
| C/14 | PPL/YEL | MIL Control | ||
| C/15 | GRN/WHT | EGR Solenoid Vacuum Control | ||
| C/16 | WHT/YEL | TCC Relay Control | ||
| C/17 | BLU/ORG | Diagnostic Request Signal | ||
| C/18 | GRN/RED | EGR By-Pass Valve Control | ||
| C/19 | BLU/ORG | Power Steering Pressure Signal | ||
| C/20 | PNK/WHT | ABS Idle-Up Signal | ||
| C/21 | ***** | Not Used | ||
| C/22 | BLK/RED | Crank Signal | ||
|
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PCM CIRCUITS (4-SPEED A/T) (1)
| Connector/Terminal No. | Wire Color | Function | ||
|---|---|---|---|---|
| A/1 | WHT | VSS Signal High | ||
| A/2 | ORG/GRN | Overdrive Switch Signal | ||
| A/3 | ORG/WHT | 4WD Low Signal | ||
| A/4 | ORG | Shift Mode Signal | ||
| A/5 | RED/YEL | Lights ON Signal | ||
| A/6 | WHT/BLK | O/D OFF Indicator | ||
| A/7 | PNK | Power Indicator | ||
| A/8 | GRN/RED | Shift Solenoid No. 2 Control | ||
| A/9 | BLK | VSS Signal Low | ||
| A/10 | GRN/BLU | L Position Signal | ||
| A/11 | GRN/RED | 2 Position Signal | ||
| A/12 | GRN | D Position Signal | ||
| A/13 | ORG/BLU | N Position Signal | ||
| A/14 | RED | R Position Signal | ||
| A/15 | GRN/ORG | Shift Solenoid No. 1 Control | ||
| A/16 | GRN/YEL | TCC Solenoid Control | ||
| B/1 | BLU | Main Relay Control | ||
| B/2 | BLK/ORG | Ground | ||
| B/3 | BLK/BLU | Ignition Voltage | ||
| B/4 | WHT | Battery Voltage | ||
| B/5 | PPL | Duty Check Output | ||
| B/6 | ORG | Ignition Control Module Output | ||
| B/7 | GRN/WHT | EGR Solenoid Vacuum Valve Control | ||
| B/8 | ***** | Not Used | ||
| B/9 | PNK | Fuel Pump Control | ||
| B/10 | PNK/BLU | TP Input | ||
| B/11 | RED | Fuel Injector No. 1 Control | ||
| B/12 | LT GRN/BLK | IAC Valve Control | ||
| B/13 | WHT/GRN | Fuel Injector No. 3 Control | ||
| B/14 | BLK/ORG | Ground | ||
| B/15 | BLK/GRN | Ground | ||
| B/16 | BLU/BLK | Ignition Voltage | ||
| B/17 | PPL/GRN | Serial Data Output | ||
| B/18 | ***** | Not Used | ||
| B/19 | PNK | HO2S No. 1 Heater Control | ||
| B/20 | ***** | Not Used | ||
| B/21 | ***** | Not Used | ||
| B/22 | ***** | Not Used | ||
| B/23 | PPL/YEL | MIL Control | ||
| B/24 | GRN/RED | Fuel Injector No. 2 Control | ||
| B/25 | GRN/YEL | EVAP Canister Purge Valve Control | ||
| B/26 | WHT/BLK | Fuel Injector No. 4 Control | ||
| C/1 | ***** | Not Used | ||
| C/2 | BLK/YEL | Starter Signal | ||
| C/3 | WHT | CMP Sensor Input | ||
| C/4 | YEL | VSS Input | ||
| C/5 | YEL/BLK | A/C ON Signal | ||
| C/6 | BLU/YEL | Diagnostic Request Signal | ||
| C/7 | ***** | Not Used | ||
| C/8 | RED/BLU | HO2S No. 1 Signal | ||
| C/9 | GRY/BLK | MAF Signal | ||
| C/10 | GRY/RED | Reference Voltage | ||
| C/11 | BRN | Sensor Ground | ||
| C/12 | ***** | Not Used | ||
| C/13 | GRN/RED | Brake Signal | ||
| C/14 | PNK/GRN | O/D Cut Signal | ||
| C/15 | BLU/WHT | CTP Switch Signal | ||
| C/16 | BLU/ORG | Power Steering Pressure Signal | ||
| C/17 | PNK/WHT | ABS Idle-Up Signal | ||
| C/18 | BLU/RED | Test Switch Signal | ||
| C/19 | RED/BLK | IAT Signal | ||
| C/20 | GRY | TP Input | ||
| C/21 | RED/YEL | ECT Input | ||
| C/22 | ***** | Not Used | ||
| D/1 | YEL | HO2S No. 2 Signal | ||
| D/2 | BRN/YEL | MAP Input | ||
| D/3 | YEL/RED | Fuel Level Input | ||
| D/4 | YEL/RED | Fuel Gauge Ground | ||
| D/5 | GRN/WHT | EVAP Canister Vent Valve Control | ||
| D/6 | PNK/WHT | HO2S No. 2 Heater Control | ||
| D/7 | BRN/WHT | Fuel Tank Pressure Input | ||
| D/8 | ORG/BLK | Ignition Reference High | ||
| D/9 | WHT/BLU | Ignition Reference Low | ||
| D/10 | ***** | Not Used | ||
| D/11 | GRN/RED | EGR By-Pass Valve Control | ||
| D/12 | GRN/BLU | EVAP Tank Pressure Control Solenoid Vacuum Valve Control | ||
|
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RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.