2005 Pontiac Vibe Base, AWDFACTORY OEM SERVICE PROCEDURE

Powertrain Control Module (PCM) Connector End Views (FWD)

Back View of PCM Connector C1

GM789637Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 34-Pin
  • WH
Pin Wire Color Function
1 YE Fuel Injector 1 Control
2 BK Fuel Injector 2 Control
3 WH Fuel Injector 3 Control
4 BU Fuel Injector 4 Control
5 BN Ground
6 WH/BK Ground
7 WH/BK Ground
8 RD/BU Ignition Trigger Signal Coil 1
9 YE/GN Ignition Trigger Signal Coil 2
10 GY Ignition Trigger Signal Coil 3
11 WH Ignition Trigger Signal Coil 4
12 BK/YE Camshaft Position (CMP) Actuator Solenoid Valve High Control
13 YE Camshaft Position (CMP) Actuator Solenoid Valve Low Control
14 L-GN/BK Fan 2 Relay Control
15 - Not Used
16 RD Ignition Positive Voltage
17 BK Crank Signal
18 YE 5-Volt Reference Circuit
19 WH Engine Coolant Temperature (ECT) Sensor Input
20 YE/BK Intake Air Temperature (IAT) Sensor Input
21 L-GN Throttle Position (TP) Sensor 1 Input
22-23 - Not Used
24 BU/YE Ignition Fail Safe Input
25-26 - Not Used
27 RD EVAP Canister Vent Solenoid Valve Control
28 BN Sensor Ground
29 BU/WH Mass Air Flow (MAF) Sensor Signal Low
30 GN Mass Air Flow (MAF) Sensor Signal High
31 L-GN Throttle Position (TP) Sensor 2 Input
32-33 - Not Used
34 BU/BK EVAP Canister Purge Solenoid Valve Control
*Automatic Transmission Only
Back View of PCM Connector C2

GM789639Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 35-Pin
  • WH
Pin Wire Color Function
1 BK Knock Sensor (KS) Signal High
2 WH/BK Ground
3 WH TAC Motor Control Low
4 L-GN TAC Motor Control High
5 PK Heated Oxygen Sensor (HO2S) 1 Heater Circuit Control
6 WH/BK Ground
7 WH/BK Heated Oxygen Sensor (HO2S) Shield Ground
8 BU/RD Power Steering Pressure (PSP) Switch Input
9 BU Shift Solenoid (SS) 2 Control*
10 BU/WH Torque Converter Clutch (TCC) Control*
11 RD/YE Shift Solenoid (SS) 1 Control*
12 PK Line Pressure Control (PC) Solenoid Control Low*
13 RD/WH Line Pressure Control (PC) Solenoid Control High*
14-15 - Not Used
16 L-GN Fan 1 Relay Control
17 GY TAC Shield Ground
18-20 - Not Used
21 PK/BK Heated Oxygen Sensor (HO2S) 2 Heater Circuit Control
22 - Not Used
23 BK Heated Oxygen Sensor (HO2S) 1 Input
24 BK Camshaft Position (CMP) Sensor Input
25 BK Crankshaft Position (CKP) Sensor Input
26-27 - Not Used
28 WH Knock Sensor (KS) Signal Low
29 WH Heated Oxygen Sensor (HO2S) 2 Input
30 - Not Used
31 WH Heated Oxygen Sensor (HO2S) 1 Low Reference
32 - Not Used
33 WH CMP Sensor and CKP Sensor Ground
34 - Not Used
35 WH/BK Ground
*Automatic Transmission Only
Back View of PCM Connector C3

GM789640Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 35-Pin
  • WH
Pin Wire Color Function
1 YE AC Pressure Switch
2 YE/BK AC Compressor Clutch Relay Control
3-5 - Not Used
6 BK/RD Throttle Actuator Control (TAC) System Ignition Voltage
7 L-GN Overdrive (OD) Indicator Control*
8 L-GN/BK Park Neutral Position (PNP) Switch L Position Signal*
9 L-GN Park Neutral Position (PNP) Switch 2 Position Signal*
10 BU Park Neutral Position (PNP) Switch D Position Signal*
11 RD/BK Park Neutral Position (PNP) Switch R Position Signal*
12 GN/OG Cruise Control Interrupt Circuit
13 GN/RD Cruise Control Indicator Lamp
14 YE/RD Engine Coolant Temperature Gage Output
15-16 - Not Used
17 PU/WH Vehicle Speed Sensor (VSS) Input
18 - Not Used
19 GN/WH Cruise Brake Switch Signal
20-23 - Not Used
24 GN/YE Cruise Control Switch
25-27 - Not Used
28 YE AC Request Signal
29 GN/BK Overdrive (OD) Switch Signal*
30-31 - Not Used
32 BK/BU Evaporator Temperature Sensor Input
33 GN/WH AC On Signal
34-35 - Not Used
*Automatic Transmission Only
Back View of PCM Connector C4

GM789641Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 31-Pin
  • WH
Pin Wire Color Function
1 BK Ignition Positive Voltage
2 - Not Used
3 RD/WH Battery Voltage
4 GY EVAP Vacuum Leak Pump Control
5 BK Engine Speed Output for Tachometer
6-7 - Not Used
8 BK/WH EFI Relay High Control
9 BK/OG Ignition Positive Voltage
10 GN/RD Circuit Opening Relay Control
11 RD/YE MIL Control
12 GN Electrical Load Idle-Up Signal, Tail Lamps
13 WH Electrical Load Idle-Up Signal, Rear Defogger
14 YE Supplemental Inflatable Restraint (SIR) System Signal
15-16 - Not Used
17 RD/YE Engine Speed Output to Brake Pressure Modulator Valve (BPMV), with Traction Control Only
18 BU/RD Serial Data
19 PK Brake Pressure Modulator Valve (BPMV) Serial Data
20 PK/BK Diagnostic Request Circuit
21 BU Fuel Tank Pressure (FTP) Sensor Input
22 GN Accelerator Pedal Position (APP) Sensor 1 Signal
23 WH Accelerator Pedal Position (APP) Sensor 2 Signal
24 BK/WH EFI Signal High, with Traction Control Only
25 RD/WH Traction Control High, with Traction Control Only
26 BK Accelerator Pedal Position (APP) Sensor 1 Reference Voltage
27 BK Accelerator Pedal Position (APP) Sensor 2 Reference Voltage
28 YE Accelerator Pedal Position (APP) Sensor 1 Low Reference
29 YE Accelerator Pedal Position (APP) Sensor 2 Low Reference
30 BU EFI Signal Low, with Traction Control Only
31 WH Traction Control Low, with Traction Control Only
*Automatic Transmission Only
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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.