Engine Control Module (ECM) Connector End Views

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