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 CONTROLS - TESTS W/CODESPCM CIRCUIT IDENTIFICATION
1998 Chevrolet Tracker 2D Utility, RWD, Automatic
Pcm Circuit Identification
1998 Chevrolet Tracker 2D Utility, RWD, AutomaticSECTION Pcm Circuit Identification
NOTE:
See PCM CIRCUITS
table and appropriate wiring diagrams in WIRING DIAGRAMS article for PCM connector and terminal identification.
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 Signal (Sensor 1) | ||
| 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 Signal (Sensor 2) | ||
| 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 Input | ||
| 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 Heater Control (Sensor 2) | ||
| 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 Heater Control (Sensor 1) | ||
| 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 Check 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 Valve 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 Relay 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 | PCM Ground | ||
| B/16 | BLU/BLK | Ignition Voltage | ||
| B/17 | PPL/GRN | Serial Data Output | ||
| B/18 | --- | Not Used | ||
| B/19 | PNK | HO2S Heater Control (Sensor 1) | ||
| 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 Signal (Sensor 1) | ||
| C/9 | GRY/BLK | MAF Sensor Input | ||
| 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 Sensor Input | ||
| C/20 | GRY | TP Sensor Input | ||
| C/21 | RED/YEL | ECT Sensor Input | ||
| C/22 | --- | Not Used | ||
| D/1 | YEL | HO2S Signal (Sensor 2) | ||
| D/2 | BRN/YEL | MAP Sensor 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 Heater Control (Sensor 2) | ||
| D/7 | BRN/WHT | Fuel Tank Pressure Input | ||
| D/8 | ORG/BLK | Ignition Reference High (CKP Sensor) | ||
| D/9 | WHT/BLU | Ignition Reference Low (CKP Sensor) | ||
| 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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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.