Engine Control Module (ECM) - C1

Fig 1: Engine Control Module (ECM) - C1 Connector End View

Courtesy of GENERAL MOTORS CORP.

Engine Control Module (ECM) - C1 Connector Parts Information

Connector Part Information

Terminal Part Information

Pins: 1, 6, 7, 12, 14, 15, 16, 18, 20, 25, 29, 33, 35, 36, 37, 39, 40, 47, 49, 53, 54, 56
Terminal/Tray: 33467-0003/23
Core/Insulation Crimp: H/H
Release Tool/Test Probe: J-38125-213/J-35616-64B (L-BU)

Engine Control Module (ECM) - C1 Connector Terminal Identification

Pin	Wire Color	Circuit No.	Function
1	YE	5	Crank Voltage
2-5	-	-	Not Used
6	BN/WH	379	CCP Switch Signal
7	OG	5371	BAS Relay Coil Supply Voltage
8	-	-	Not Used
9	TN	452	Low Reference
10	-	-	Not Used
11	YE/BK	5270	Traction Control Signal Data
12	BN/WH	419	MIL Control
13	-	-	Not Used
14	D-GN/WH	465	Fuel Pump Primary Relay Control
15	PU	1807	Class 2 Serial Data (Primary)
16	PU	1807	Class 2 Serial Data (Primary)
17	-	-	Not Used
18	YE	343	Accessory Voltage
19	PK	239	Ignition Voltage
20	RD/WH	1440	Battery Position Voltage
21-24	-	-	Not Used
25	WH	121	Engine Speed Signal
26-28	-	-	Not Used
29	GY	1884	Cruise Control Switch Signal
30-32	-	-	Not Used
33	WH/BK	1164	5-Volt Reference
34	GY	596	5-Volt Reference
35	TN	1274	5-Volt Reference
36	BN	1271	Low Reference
37	PU	1272	Low Reference
38	-	-	Not Used
39	BN	818	Vehicle Speed Signal
40	BN	5069	Main Relay Control
41-43	-	-	Not Used
44	D-BU	1936	Primary Fuel Level Sensor Signal
45	L-BU	1937	Secondary Fuel Level Sensor Signal
46	-	-	Not Used
47	D-BU	1161	APP Sensor 1 Signal
48	D-GN	890	Fuel Tank Pressure Sensor Signal
49	L-BU	1162	APP Sensor 2 Signal
50-52	-	-	Not Used
53	D-GN/WH	459	A/C Compressor Clutch Relay Control
54	D-BU	473	High Speed Cooling Fan Relay Control
55	WH	1310	EVAP Canister Vent Solenoid Control
56	YE	447	Starter Relay Coil Control