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Powertrain Control Module (PCM) Connector End Views

Back View of the PCM Connector C1

GM477054Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 2.5L VIN 4 Powertrain
  • 35 Pin Gray Connector C1 with Blue Terminal Secondary Lock Insert
Pin Wire Color Function
C1-1 WHT/GRN Fuel Pump Relay Control
C1-2 - Not Used
C1-3 PNK/BLU Cruise Control Module Signal
C1-4 BRN Tachometer
C1-5 YEL/BLU A/C Condenser Fan Relay Control
C1-6 GRY TP Signal (for cruise control, if equipped)
C1-7 WHT/BLK O/D Indicator Lamp Control
C1-8 BLU Main Relay Control
C1-9 ORN/BLU Shift Mode Switch Input
C1-10 GRY/BLU Power/Normal Indicator Lamp Control
C1-11 - Not Used
C1-12 BLU/WHT Fuel Tank Level Sensor Input
C1-13 PNK/WHT HVAC Blower Motor Idle-Up Signal
C1-14 YEL/RED O/D Switch Signal
C1-15 BLK/ORN Electrical Load Idle-Up Signal (rear defogger switch)
C1-16 to C1-17 - Not Used
C1-18 PNK/BLK EBCM Idle-Up Signal (ABS equipped vehicles only)
C1-19 GRY/GRN Fuel Vapor Temperature Sensor Input
C1-20 BRN/RED Fuel Tank Pressure Sensor Input
C1-21 to C1-24 - Not Used
C1-25 PPL/GRN Serial Data Output
C1-26 BLU/ORN PSP Switch Idle-Up Signal
C1-27 GRY/WHT A/C Cut-Out Control
C1-28 YEL/BLK A/C Idle-Up Signal
C1-29 RED/YEL Tail Lamp Switch Idle-Up Signal
C1-30 - Not Used
C1-31 GRN/WHT Brake Switch Signal
C1-32 GRY/YEL Fuel Tank Pressure Sensor Ground
C1-33 GRY/RED Fuel Tank Pressure Sensor Reference Voltage
C1-34 PPL/YEL MIL Control
C1-35 WHT Battery Positive Voltage
Back View Of the PCM Connector C2

GM477055Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 2.5L VIN 4 Powertrain
  • 26 Pin Gray Connector C2 with Blue Terminal Secondary Lock Insert
Pin Wire Color Function
C2-1 BLU/YEL VSS Input
C2-2 ORN/BLU CKP Sensor Signal Low
C2-3 WHT/BLU CKP Sensor Signal High
C2-4 RED H02S Bank 1 Sensor 1 Signal
C2-5 BLK/RED H02S Bank 2 Sensor 1 Heater Control
C2-6 GRY H02S Bank 1 Sensor 1 Heater Control
C2-7 - Not Used
C2-8 LT BLU IAT Sensor Input
C2-9 YEL/GRN CMP Sensor Signal High
C2-10 YEL/BLU CMP Sensor Signal Low
C2-11 GRY/RED Reference Voltage
C2-12 RED/GRN TP Sensor Input
C2-13 RED/WHT MAP Sensor Input
C2-14 BLU H02S Bank 1 Sensor 2 Signal
C2-15 BLU/GRN H02S Bank 2 Sensor 1 Signal
C2-16 PNK/WHT H02S Bank 2 Sensor 2 Heater Control
C2-17 WHT/BLK H02S Bank 1 Sensor 2 Heater Control
C2-18 - Not Used
C2-19 PPL/RED EVAP Canister Vent Solenoid Control
C2-20 GRY/YEL Sensor Ground
C2-21 GRY/YEL Sensor Ground
C2-22 ORN/BLK ECT Sensor Input
C2-23 PPL/WHT MAF Sensor Input
C2-24 BRN H02S Bank 2 Sensor 2 Signal
C2-25 BLK/GRN Ground
C2-26 BLK/BLU Ground
Back View Of the PCM Connector C3

GM690490Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 2.5L VIN 4 Powertrain
  • 20 Pin Connector C3 with White Terminal Secondary Lock Insert
Pin Wire Color Function
C3-1 LT GRN/RED Shift Solenoid #2 Control
C3-2 GRN/YEL TCC Solenoid Control
C3-3 RED TR Switch R Position Signal
C3-4 ORN/GRN TR Switch P Position Signal
C3-5 ORN/WHT 4WD Low Signal
C3-6 LT GRN Shift Solenoid #1 Control
C3-7 ORN/BLK 4WD Indicator Lamp Control
C3-8 BLU/GRN A/T Input Shaft Speed Sensor Signal Low
C3-9 ORN A/T Output Shaft Speed Sensor Signal Low
C3-10 WHT A/T Output Shaft Speed Sensor Signal High
C3-11 BLK/ORN 4WD Signal
C3-12 YEL/GRN TR Switch D Position Signal
C3-13 ORN/BLU TR Switch N Position Signal
C3-14 GRY Shaft Speed Signal Shielded Ground
C3-15 RED Axle Actuator Control High
C3-16 BLU/YEL A/T Input Shaft Speed Sensor Signal High
C3-17 - Not Used
C3-18 PNK Axle Actuator Control Low
C3-19 GRN/BLU TR Switch L Position Signal
C3-20 GRN/ORG TR Switch 2 Position Signal
Back View Of the PCM Connector C4

GM477056Courtesy of GENERAL MOTORS CORP.
Connector Part Information
  • 2.5L VIN 4 Powertrain
  • 28 Pin Gray Connector C4 with Orange Terminal Secondary Lock Insert
Pin Wire Color Function
C4-1 GRN/BLK EVAP Canister Purge Valve Control
C4-2 BLK/ORN Gound
C4-3 BLK/WHT Ignition Positive Voltage
C4-4 LT GRN/WHT EGR Valve Coil Control
C4-5 LT GRN EGR Valve Coil Control
C4-6 PNK/BLK Fuel Injector #2 Control
C4-7 PNK Fuel Injector #1 Control
C4-8 BLK/GRN Ground
C4-9 BLK/BLU Ground
C4-10 BRN/YEL Ignition Coil #4 Control
C4-11 BRN/WHT Ignition Coil #3 Control
C4-12 BRN/BLK Ignition Coil #2 Control
C4-13 BRN Ignition Coil #1 Control
C4-14 PPL/BLK IAC Valve Coil Control
C4-15 LT GRN/BLK IAC Valve Coil Control
C4-16 LT GRN/RED EGR Valve Coil Control
C4-17 LT GRN/YEL EGR Valve Coil Control
C4-18 PNK/BLU Fuel Injector #4 Control
C4-19 PNK/GRN Fuel Injector #3 Control
C4-20 BLU/BLK Ignition Positive Voltage
C4-21 BLU/BLK Ignition Positive Voltage
C4-22 BLK/BRN Ignition Coil #6 Control
C4-23 BRN/RED Ignition Coil #5 Control
C4-24 PPL/YEL IAC Valve Coil Control
C4-25 GRY/BLU IAC Valve Coil Control
C4-26 BLK/YEL Crank Signal
C4-27 GRY/BLK Fuel Injector #6 Control
C4-28 GRY/GRN Fuel Injector #5 Control
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