Engine Control Module (ECM) Connector End Views

WARNING: This page is about a different car, the 2005 Saturn L300. However, it is still accessible from the selected car via links, so may be relevant.

Engine Control Module (ECM) C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15356822 54-Way F Micro 64 Sealed (BK)
Pin	Wire Color	Circuit No.	Function
1	YE	581	TAC Motor Control - 1
2	BK/WH	51	HO2S Heater Low Control
3	PK/BK	1746	Fuel Injector 3 Control
4	L-BU	1110	Intake Manifold Runner Control Solenoid Control
5	D-GN/WH	428	EVAP Canister Purge Solenoid Control
6	BK	452	Low Reference
7	GY	1981	HO2S High Signal
8	-	-	Not Used
9	-	-	Not Available
10	PU	574	Low Reference
11	PU/WH	1665	HO2S Input Pump Current
12	GY	1979	HO2S Low Reference
13	-	-	Not Available
14	YE	1157	Ignition Coil 5 Control
15	PK	1155	Ignition Coil 3 Control
16	L-BU	1153	Ignition Coil 1 Control
17	BN	582	TAC Motor Control - 2
18	TN/WH	551	HO2S Heater Low Control
19	BK	1744	Fuel Injector 1 Control
20	BK/WH	845	Fuel Injector 5 Control
21	-	-	Not Used
22	D-BU	496	Knock Sensor 1 Signal
23	PU/WH	1668	HO2S High Signal
24	YE/BK	487	TP Sensor 3 Signal
25	YE	410	ECT Sensor Signal
26	PU/WH	652	Low Reference
27	-	-	Not Available
28	PU	412	HO2S Reference Voltage
29	TN	1664	HO2S Output Pump Current
30	TN	1158	Ignition Coil 6 Control
31	PU	1156	Ignition Coil 4 Control
32	D-BU	1154	Ignition Coil 2 Control
33	YE	581	TAC Motor Control - 1
34	BK/WH	151	HO2S Heater Low Control
35	L-GN/BK	1745	Fuel Injector 2 Control
36	YE/BK	846	Fuel Injector 6 Control
37	-	-	Not Used
38	L-BU	1876	Knock Sensor 2 Signal
39	TN	1671	HO2S Low Signal
40	D-GN	485	TP Sensor 1 Signal
41	-	-	Not Used
42	BN/WH	633	CMP Sensor Signal
43	TN	1667	HO2S Output Pump Current
44	TN/WH	1653	HO2S Reference Voltage
45-48	-	-	Not Available
49	BN	582	TAC Motor Control - 2
50	BK/WH	751	HO2S Heater Low Control
51	GY	416	5-Volt Reference A
52	L-BU/BK	844	Fuel Injector 4 Control
53	-	-	Not Available
54	YE/BK	457	Low Reference
55	TN/WH	1669	HO2S Low Signal
56	YE	492	MAF Sensor Signal
57	TN	472	IAT Sensor Signal
58	PU	486	TP Sensor 2 Signal
59	YE	573	CKP Sensor Signal
60	TN	413	HO2S Low Reference
61	PU	1666	HO2S Input Pump Current
62	BK/WH	451	Ground
63-64	-	-	Not Available

Engine Control Module (ECM) C2

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15356823 37-Way F Micro 64 Sealed (BK)
Pin	Wire Color	Circuit No.	Function
1	D-BU	473	High Speed Cooling Fan Relay Control
2-6	-	-	Not Available
7	TN	1274	5-Volt Reference
8	D-BU	1161	APP Sensor 1 Signal
9	TN/BK	231	Oil Pressure Switch Signal
10	GY	397	Cruise Control On Switch Signal
11	RD	225	Generator Turn On Signal
12	TN	2501	CAN Low
13	D-GN/WH	459	A/C Compressor Clutch Relay Control
14	-	-	Not Available
15	OG	480	Battery Positive Voltage
16	OG	2740	Ignition 1 Voltage
17	-	-	Not Available
18	WH	1310	EVAP Canister Vent Solenoid Control
19-20	-	-	Not Available
21	RD/BK	380	A/C Refrigerant Pressure Sensor Signal
22-23	-	-	Not Available
24	BN	1271	Low Reference
25	BK	2759	Low Reference
26	BN	86	Cruise Control Release Signal
27	L-BU	20	Stop Lamp Switch Signal
28	OG/BK	463	Requested Torque Signal
29	TN/WH	2500	CAN High
30	L-GN	497	Fuel Pump Relay Control
31	WH	2561	Main Relay Control
32	OG	2740	Ignition 1 Voltage
33-34	-	-	Not Available
35	WH	121	Engine Speed Signal
36	-	-	Not Available
37	D-GN	890	Fuel Tank Pressure Sensor Signal
38	PU	30	Fuel Level Sensor Signal
39	-	-	Not Available
40	L-BU	1162	APP Sensor 2 Signal
41	-	-	Not Available
42	GY/BK	87	Cruise Control Resume/Accel Switch Signal
43	D-BU	84	Cruise Control Set/Coast Switch Signal
44	WH	1909	Vehicle Speed Signal
45	TN/BK	2500	CAN High
46	-	-	Not Available
47	PK	339	Ignition 1 Voltage
48	OG	2740	Ignition 1 Voltage
49	-	-	Not Available
50	D-GN	335	Low Speed Cooling Fan Relay Control
51	-	-	Not Available
52	TN/BK	464	Delivered Torque Signal
53	PU	1319	Engine/Radio Serial Data K-Line
54-55	-	-	Not Available
56	WH/BK	1164	5-Volt Reference
57-60	-	-	Not Available
61	TN	2501	CAN Low
62	-	-	Not Available
63	GY	2709	5-Volt Reference
64	-	-	Not Available