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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
(1) See Fig 1 .
Fig 1: Identifying PCM Connector Terminals (Tracker With Manual Or 3-Speed Automatic Transmission)
G96H09867Courtesy of GENERAL MOTORS CORP.
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
(1) See Fig 2 .
Fig 2: Identifying PCM Connector Terminals (4-Speed Automatic Transmission)
G96H09886Courtesy of GENERAL MOTORS CORP.
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