Engine Control Module (ECM) Connector End View C1

Fig 1: ECM C1 Connector End View

Courtesy of GENERAL MOTORS CORP.

ECM C1 Connector Part Information

Connector Part Information  OEM: 15499466 Service: See Catalog Description: 73-Way F 0.64 2.8 Sealed (BK)

Terminal Part Information  Terminal/Tray: See Terminal Repair Kit Core/Insulation Crimp: See Terminal Repair Kit Release Tool/Test Probe: See Terminal Repair Kit

ECM C1 Connector End View

Pin	Wire Color	Circuit No.	Function
1	OG	1786	Park/Neutral Signal
2-8	-	-	Not Used
9	WH	17	Stop Lamp Supply Voltage
10	PU	3120	HO2S High Signal (Bank 1 Sensor 2)
11	TN	3121	HO2S Low Signal (Bank 1 Sensor 2)
12	OG	380	A/C Refrigerant Pressure Sensor Signal
13	TN	5514	Low Reference
14-15	-	-	Not Used
16	PU	1589	Fuel Level Sensor Signal [- Primary]
17	D-BU	473	High Speed Cooling Fan Relay Control
18	BN	4	Accessory Voltage
19	PK	639	Ignition 1 Voltage
20	RD	540	Battery Positive Voltage
21-22	-	-	Not Used
23	PU	1272	Low Reference
24	D-GN	890	Fuel Tank Pressure Sensor Signal
25	-	-	Not Used
26	D-BU	6306	CPP Switch Signal (MU9)
27	TN	2501	High Speed GMLAN Serial Data Bus-
28	TN	2500	High Speed GMLAN Serial Data Bus+
29	D-BU	1161	APP Sensor 1 Signal
30	BN	1271	Low Reference
31	OG/BK	1057	Low Reference
32	L-BU	1162	APP Sensor 2 Signal
33	GY	705	5-Volt Reference 2
34	GY	2700	5-Volt Reference 3
35	-	-	Not Used
36	TN	1274	5-Volt Reference 2
37	TN	472	IAT Sensor Signal
38	OG	2760	Low Reference
39-40	-	-	Not Used
41	YE	492	MAF Sensor Signal
42	D-GN/WH	6294	Low Reference (MU9)
43-44	-	-	Not Used
45	D-BU	6806	IMT Valve Signal
46	-	-	Not Used
47	PK	5290	Ignition 1 Voltage
48	BN	818	Vehicle Speed Signal
49	TN	3221	HO2S Low Signal (Bank 2 Sensor 2)
50	D-GN	465	Fuel Pump Relay Control [- Primary]
51	-	-	Not Used
52	PU	6386	Starter Relay Coil Control
53	-	-	Not Used
54	D-GN	6293	5-Volt Reference 1 (MU9)
55	-	-	Not Used
56	WH	1164	5-Volt Reference 3
57	-	-	Not Used
58	D-GN	335	Low Speed Cooling Fan Relay Control
59	BN	5069	Main Relay Coil Control
60	TN	2759	Low Reference
61	WH	1310	EVAP Canister Vent Solenoid Control
62	OG	6392	IMT Valve Control
63	D-GN	459	A/C Compressor Clutch Relay Control
64	OG	3223	HO2S Heater Low Control (Bank 2 Sensor 2)
65	GY	3122	HO2S Heater Low Control [Bank 2 Sensor 1]
66-67	-	-	Not Used
68	BN	419	MIL Control
69	PU	3220	HO2S High Signal (Bank 2 Sensor 2)
70	-	-	Not Used
71	YE	400	VSS High Signal (MU9)
72	PU	401	VSS Low Signal (MU9)
73	BK	451	Ground