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Home >> Pontiac >> 2007 >> Vibe Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System & Fuel System - Introduction (2 Of 2) >> Component Locator >> Powertrain Control Module Connector End Views >> Back View of PCM Connector - C4
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Back View of PCM Connector - C4

Fig 1: Back View of PCM Connector - C4 Connector End View
GM789641Courtesy of GENERAL MOTORS CORP.
Back View of PCM Connector - C4 Connector & Terminal Parts Information

Connector Part Information 
  • OEM: -
  • Service: N/A
  • Description: 31-Pin (WH)
Back View of PCM Connector - C4 Terminal Identification

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