Powertrain Control Module (PCM) Connector End Views

Back View of the PCM Connector End Views C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		34-Pin WHT
Pin	Wire Color	Function
1	YEL	Fuel Injector 1 Control
2	BLK	Fuel Injector 2 Control
3	WHT	Fuel Injector 3 Control
4	BLU	Fuel Injector 4 Control
5	BLK/BLU	Idle Air Control (IAC) Valve Control
6	WHT/BLK	Ground
7	WHT/BLK	Ground
8	RED/BLU	Ignition Trigger Signal Coil 1
9	YEL/GRN	Ignition Trigger Signal Coil 2
10	GRY	Ignition Trigger Signal Coil 3
11	WHT	Ignition Trigger Signal Coil 4
12	BLU/BLK	EVAP Canister Purge Solenoid Valve Control
13	YEL	AC Pressure Switch
14	BLK/YEL	Camshaft Position (CMP) Actuator Solenoid Valve High Control
15	YEL	Camshaft Position (CMP) Actuator Solenoid Valve Control Low
16	PNK	Line Pressure Control (PC) Solenoid Control Low*
17	RED/WHT	Line Pressure Control (PC) Solenoid Control High*
18	YEL	5-Volt Reference Circuit
19	WHT	Engine Coolant Temperature (ECT) Sensor Input
20	YEL/BLK	Intake Air Temperature (IAT) Sensor Input
21	LT GRN	Throttle Position (TP) Sensor Input
22	-	Not Used
23	BLU/YEL	Ignition Fail Safe Input
24	BLU/YEL	Rocker Arm Oil Control Solenoid Valve Control High
25	BLK	Rocker Arm Oil Control Solenoid Valve Control Low
26	BLK	Camshaft Position (CMP) Sensor Input
27	BLK	Crankshaft Position (CKP) Sensor Input
28	BRN	Sensor Ground
29	-	Not Used
30	LT GRN	Secondary AIR Injection Pressure Sensor Input
31-32	-	Not Used
33	BLK/BLU	Secondary AIR Injection Solenoid Valve Control
34	WHT	CMP Sensor and CKP Sensor Ground

Back of the Connector View C2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		35-Pin WHT
Pin	Wire Color	Function
1	BLK	Knock Sensor (KS) Signal High
2	WHT	Knock Sensor (KS) Signal Low
3	BLK/ORN	Secondary AIR Injection Pump Relay Control
4	PNK	Heated Oxygen Sensor (HO2S) 1 Heater Circuit Control
5	WHT/BLK	Ground
6	-	Not Used
7	BRN	Ground
8	RED	Ignition Positive Voltage*
9	BLK	Crank Signal
10	-	Not Used
11	BLK	Torque Converter Clutch (TCC) Solenoid Control*
12-14	-	Not Used
15	BLU	Overdrive (OD) Shift Solenoid Control*
16	BLU/WHT	Shift Solenoid (SS) 2 Control Low*
17	BLU/ORN	Shift Solenoid (SS) 2 Control High*
18	BLU	Shift Solenoid (SS) 1 Control Low*
19	RED/YEL	Shift Solenoid (SS) 1 Control High*
20	-	Not Used
21	WHT	Heated Oxygen Sensor (HO2S) 2 Input
22	-	Not Used
23	RED	Heated Oxygen Sensor (HO2S) 1 Input
24	GRN	Mass Air Flow (MAF) Sensor Signal High
25	-	Not Used
26	RED	Counter Gear Speed Sensor Reference High*
27	WHT	Input Shaft Speed Sensor Reference High*
28	WHT/BLK	Ground
29	BLU/RED	Power Steering Pressure (PSP) Switch Input
30-31	-	Not Used
32	BLU/WHT	Mass Air Flow (MAF) Sensor Signal Low
33	BLK/WHT	Rocker Arm Oil Pressure Switch Input
34	GRN	Counter Gear Speed Sensor Reference Low*
35	BLK	Input Shaft Speed Sensor Reference Low*

Back View of the Connector View C3

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		35-Pin WHT
Pin	Wire Color	Function
1	BLU	EVAP Canister Vent Solenoid Valve Control
2	YEL/BLK	AC Compressor Clutch Relay Control
3	-	Not Used
4	PNK/BLK	Heated Oxygen Sensor (HO2S) 2 Heater Circuit Control
5	BLU/WHT	Auxiliary Intake Air Control Solenoid Control
6	-	Not Used
7	LT GRN	Overdrive (OD) Indicator Control
8	LT GRN/BLK	Park Neutral Position (PNP) Switch L Position Signal
9	LT GRN	Park Neutral Position (PNP) Switch 2 Position Signal
10	BLU	Park Neutral Position (PNP) Switch D Position Signal
11	RED/BLK	Park Neutral Position (PNP) Switch R Position Signal
12-13	-	Not Used
14	YEL/RED	Engine Coolant Temperature Gage Output
15-16	-	Not Used
17	PPL/WHT	Vehicle Speed Sensor (VSS) Input
18	RED/YEL	Overdrive (OD) Cut Signal, with Cruise Control*
19	GRN/WHT	Brake Switch Signal
20-28	-	Not Used
29	GRN/BLK	Overdrive (OD) Switch Signal*
30	-	Not Used
31	YEL	AC Request Signal
32	BLK/BLU	Evaporator Temperature Sensor Input
33	GRN/WHT	AC On Signal
34-35	-	Not Used

Back View of the Connector View C4

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		31-Pin WHT
Pin	Wire Color	Function
1	BLK	Ignition Positive Voltage
2	-	Not Used
3	RED/WHT	Battery Voltage
4	RED	EVAP Pressure Switching Solenoid Control
5	BLK	Engine Speed Output for Tachometer
6	GRN	Fan 1 Relay Control
7	GRN/BLK	Fan 2 Relay Control
8	BLK/WHT	EFI Relay Control High
9	BLK/ORN	Ignition Positive Voltage
10	GRN/RED	Circuit Opening Relay Control
11	RED/YEL	MIL Control
12	GRN	Electrical Load Idle-Up Signal, Tail Lamps
13	WHT	Electrical Load Idle-Up Signal, Rear Defogger
14	YEL	Supplemental Inflatable Restraint (SIR) System Signal
15	-	Not Used
16	BLU/WHT	Cruise Control Idle
17	-	Not Used
18	BLU/RED	Serial Data
19	PNK	Data Link Connector (DLC)
20	PNK/BLK	Diagnostic Request Circuit
21	BLU	Fuel Tank Pressure (FTP) Sensor Input
22-31	-	Not Used