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

WARNING: This page is about a different car, the 2005 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.

Back View of PCM Connector C1

Courtesy 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	BK/BU	Idle Air Control (IAC) Valve Control
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	BU/BK	EVAP Canister Purge Solenoid Valve Control
13	YE	AC Pressure Switch
14	BK/YE	Camshaft Position (CMP) Actuator Solenoid Valve High Control
15	YE	Camshaft Position (CMP) Actuator Solenoid Valve Low Control
16	PK	Line Pressure Control (PC) Solenoid Control Low
17	RD/WH	Line Pressure Control (PC) Solenoid Control High
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	-	Not Used
23	BU/YE	Ignition Fail Safe Input
24-25	-	Not Used
26	BK	Camshaft Position (CMP) Sensor Input
27	BK	Crankshaft Position (CKP) Sensor Input
28	BN	Sensor Ground
29	-	Not Used
30	WH/BU	Transmission Fluid Temperature Sensor Input, with AWD Only
31-33	-	Not Used
34	WH	CMP Sensor and CKP Sensor Ground

Back View of PCM Connector C2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		35-Pin WH
Pin	Wire Color	Function
1	BK	Knock Sensor (KS) Signal High
2	WH	Knock Sensor (KS) Signal Low
3	-	Not Used
4	PK	Heated Oxygen Sensor (HO2S) 1 Heater Circuit Control
5	WH/BK	Ground
6	-	Not Used
7	BN	Ground
8	RD	Ignition Positive Voltage
9	BK	Crank Signal
10-11	-	Not Used
12	BU/OG	Shift Solenoid ST Control
13	-	Not Used
14	BU	Shift Solenoid (SS) 2 Control
15	RD/YE	Shift Solenoid (SS) 1 Control
16-18	-	Not Used
19	BU/WH	Torque Converter Clutch (TCC) Control
20	-	Not Used
21	WH	Heated Oxygen Sensor (HO2S) 2 Input
22	-	Not Used
23	BK	Heated Oxygen Sensor (HO2S) 1 Input
24	GN	Mass Air Flow (MAF) Sensor Signal High
25-26	-	Not Used
27	WH	Input Shaft Speed Sensor Reference High
28	WH/BK	Ground
29	BU/RD	Power Steering Pressure (PSP) Switch Input
30-31	-	Not Used
32	BU/WH	Mass Air Flow (MAF) Sensor Signal Low
33-34	-	Not Used
35	BK	Input Shaft Speed Sensor Reference Low

Back View of PCM Connector C3

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		35-Pin WH
Pin	Wire Color	Function
1	BU	EVAP Canister Vent Solenoid Valve Control
2	YE/BK	AC Compressor Clutch Relay Control
3	-	Not Used
4	PK/BK	Heated Oxygen Sensor (HO2S) 2 Heater Circuit Control
5-6	-	Not Used
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
12-13	-	Not Used
14	YE/RD	Engine Coolant Temperature Gage Output
15-16	-	Not Used
17	PU/WH	Vehicle Speed Sensor (VSS) Input
18	RD/YE	Overdrive (OD) Cut Signal, with Cruise Control
19	GN/WH	Brake Switch Signal
20-28	-	Not Used
29	GN/BK	Overdrive (OD) Switch Signal
30	-	Not Used
31	YEL	AC Request Signal
32	BK/BU	Evaporator Temperature Sensor Input
33	GN/WH	AC On Signal
34-35	-	Not Used

Back View of PCM Connector C4

Courtesy 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	RD	EVAP Pressure Switching Solenoid Control
5	BK	Engine Speed Output for Tachometer
6	GN	Fan 1 Relay Control
7	GN/BK	Fan 2 Relay Control
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	-	Not Used
16	BU/WH	Cruise Control Idle
17	-	Not Used
18	BU/RD	Serial Data
19	PK	Data Link Connector (DLC)
20	PK/BL	Diagnostic Request Circuit
21	BU	Fuel Tank Pressure (FTP) Sensor Input
22-31	-	Not Used