Powertrain Control Module (PCM) C1 Connector End View

Powertrain Control Module (PCM) C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15481642 56-Way F Micro-Pack 64 Sealed (BU)
Pin	Wire Color	Circuit No.	Function
1	TN/WH	2500	High-Speed GMLAN Serial Data Bus (+)
2	TN	2501	High-Speed GMLAN Serial Data Bus (-)
3	-	-	Not Used
4	BN/WH	419	MIL Control
5-6	-	-	Not Used
7	BN	1271	Low Reference
8	PU	1272	Low Reference
9	-	-	Not Used
10	BN	5069	Powertrain Relay Control
11-12	-	-	Not Used
13	YE/BK	625	Starter Enable Relay Control
14	PK/BK	5290	Ignition 1 Voltage
15	-	-	Not Used
16	D-GN	1049	PCM Class 2 Serial Data
17	GY	397	Cruise Control On Switch Signal
18	BN	1141	Ignition 3 Voltage
19	PK	439	Ignition 1 Voltage
20	OG	540	Battery Positive Voltage
21	D-GN	389	Vehicle Speed Signal
22	D-BU	1161	APP Sensor 1 Signal
23	-	-	Not Used
24	D-GN	890	Fuel Tank Pressure Sensor Signal
25	-	-	Not Used
26	RD-BK	380	A/C Refrigerant Pressure Sensor Signal
27	GY-BK	87	Cruise Control Resume/Accel/Switch Signal
28	-	-	Not Used
29	TN-GY	1274	5-Volt Reference A
30	GY	2700	5-Volt Reference
31	GY	2709	5-Volt Reference
32	WH	17	Stop Lamp Switch Signal
33	D-BU	84	Cruise Control Set/Cruise Control Switch Signal
34	-	-	Not Used
35	WH-BK	1164	5-Volt Reference B
36	D-GN	335	Low Speed Cooling Fan Relay Control
37	PU	1589	Fuel Level Sensor Signal
38-40	-	-	Not Used
41	L-BU	1162	APP Sensor 2 Signal
42-44	-	-	Not Used
45	D-GN/WH	465	Fuel Pump Relay Control
46-47	-	-	Not Used
48	WH	121	Engine Speed Signal
49-53	-	-	Not Used
54	WH	1310	EVAP Canister Vent Solenoid Control
55	BK	2751	Low Reference
56	D-BU	473	High Speed Cooling Fan Relay Control