Powertrain Control Module (PCM) Connector End Views

WARNING: This page is about a different car, the 2004 Saturn Ion Red Line. However, it is still accessible from the selected car via links, so may be relevant.

Powertrain Control Module (PCM) C1 Terminal Identification

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15357147 56-Way F Micro 64 Sealed (BU)
Pin	Wire Color	Circuit No.	Function
1-5	-	-	Not Used
6	D-GN/WH	459	A/C Compressor Clutch Relay Control
7	BN	1271	Low Reference
8	PU	1272	Low Reference
9	-	-	Not Used
10	D-BU	473	High Speed Cooling Fan Relay Control
11	-	-	Not Used
12	PU	1589	Fuel Level Sensor Signal - Primary
13	PK/BK	5290	Ignition 1 Voltage
14	L-BU	6118	IAT 2 Sensor Signal
15	PU	1807	ECM Class 2 Serial Data
16	PU	1807	ECM Class 2 Serial Data
17	GY	2700	5-Volt Reference
18	BN	4	Accessory Voltage
19	YE	1139	Ignition 1 Voltage
20	OG	480	Load Management Control
21	-	-	Not Used
22	WH	1310	EVAP Canister Vent Solenoid Control
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	D-BU	1161	APP Sensor 1 Signal
28	-	-	Not Used
29	BK	2759	Low Reference
30	WH/BK	1164	5-Volt Reference
31	-	-	Not Used
32	L-BU	20	Stop Lamp Supply Voltage/Stop Lamp Switch Signal
33	-	-	Not Used
34	PK	2014	Coolant Pump Relay Control
35-36	-	-	Not Used
37	D-GN/WH	465	Fuel Pump Relay Control - Primary
38	BN	5069	Main Relay Control
39	-	-	Not Used
40	BN/WH	419	MIL Control
41	L-BU	1162	APP Sensor 2 Signal
42	-	-	Not Used
43	TN	1274	5-Volt Reference
44	GY	1884	Cruise Control Set/Coast and Resume/Accelerate Switch Signal
45	-	-	Not Used
46	PU	420	TCC Brake Switch/Cruise Control Release Signal
47	GY	705	5-Volt Reference
48	YE	447	Starter Relay Coil Control
49-50	-	-	Not Used
51	D-GN	335	Low Speed Cooling Fan Relay Control
52	-	-	Not Used
53	BN/WH	379	CPP Switch Signal
54	D-GN	1433	PNP/Clutch Start Switch Signal
55	-	-	Not Used
56	BK	2751	Low Reference

Powertrain Control Module (PCM) C2 Terminal Identification

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15357131 73-Way F GT 280 Micro 64 Sealed (BK)
Pin	Wire Color	Circuit No.	Function
1	RD	225	Generator Turn On Signal
2	D-GN	485	TP Sensor 1 Signal
3	-	-	Not Used
4	GY	596	5-Volt Reference
5	GY	2704	5-Volt Reference
6	GY	2701	A/C Refrigerant Pressure Sensor Signal (C60)
7	PU	486	TP Sensor 2 Signal
8	D-GN	6291	5-Volt Reference
9	L-BU/BK	1688	5-Volt Reference
10-15	-	-	Not Used
16	PU	6413	Low Reference
17	YE	573	CKP Sensor 1 Signal
18	PU	574	Low Reference
19	-	-	Not Used
20	D-GN/WH	6292	Low Reference
21	PK/BK	632	Low Reference
22-24	-	-	Not Used
25	TN/WH	1669	HO2S Low Signal Bank 1 Sensor X
26	BN/WH	633	Camshaft Position Signal
27-28	-	-	Not Used
29	GY	1724	Boost Control Solenoid Control
30	OG/BK	469	Low Reference
31	-	-	Not Used
32	TN	1667	HO2S Low Signal Bank 2 Sensor 1
33	BK	1744	Fuel Injector 1 Control
34	-	-	Not Used
35	YE	410	ECT Sensor Signal
36	BK/WH	1704	Low Reference
37	GY	6337	MAP Sensor Signal
38	L-GN	432	SCIP Sensor Signal
39	BK	2752	Low Reference
40	BN/WH	6405	IC 1 Signal
41	YE	492	MAF Sensor Signal
42	D-GN/WH	6407	IC 4 Signal
43	BK/WH	1423	HO2S Heater Low Control Bank 1 Sensor 2
44	-	-	Not Used
45	GY	23	Generator Field Duty Cycle Signal
46	PU/WH	1668	HO2S High Signal Bank 1 Sensor X
47	-	-	Not Used
48	PU	1666	HO2S High Signal Bank 2 Sensor 1
49-50	-	-	Not Used
51	TN	472	IAT Sensor Signal
52	BK	2761	Low Reference
53	L-GN/BK	1745	Fuel Injector 2 Control
54	L-BU/BK	844	Fuel Injector 4 Control
55	PK/BK	1746	Fuel Injector 3 Control
56-57	-	-	Not Used
58	D-GN	676	HO2S Heater High Control Bank 1 Sensor 1
59	D-BU/WH	6406	IC 3 Signal
60	L-BU/WH	6408	IC 2 Signal
61-63	-	-	Not Used
64	BK	2760	Low Reference
65	BN	582	TAC Motor Control 2
66	YE	581	TAC Motor Control 1
67	-	-	Not Used
68	D-BU	496	Knock Sensor 1 Signal
69	GY	1716	Low Reference
70-72	-	-	Not Used
73	BK/WH	451	Ground

Powertrain Control Module (PCM) C3 Terminal Identification

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15357148 56-Way F Micro 64 Sealed (GY)
Pin	Wire Color	Circuit No.	Function
1-14	-	-	Not Used
15	TN/BK	231	Oil Pressure Switch Signal
16-21	-	-	Not Used
22	WH/BK	2932	5-Volt Reference
23-30	-	-	Not Used
31	GY/BK	433	BARO Sensor Signal
32-35	-	-	Not Used
36	OG/BK	6014	Low Reference
37	D-GN/WH	428	EVAP Canister Purge Solenoid Control
38-43	-	-	Not Used
44	PU	401	Signal Low - Front/VSS Low Signal/OSS Low Signal
45	YE	400	Signal High - Front/VSS High Signal/OSS High Signal
46-56	-	-	Not Used