Engine Control Module (ECM) Connector End View C1

Fig 1: ECM C1 Connector

Courtesy of GENERAL MOTORS CORP.

Engine Control Module (ECM) Connector End Views

Connector Part Information  OEM: 34576-3503 Service: 88988367 Description: 56-Way F Micro-Pack 64 Series (BU)

Terminal Part Information  Pins: Terminal: Core/Insulation Crimp: Release Tool/Test Probe:

Engine Control Module (ECM) C1

Pin	Wire Color	Circuit No.	Function
1	-	-	Not Used
2	PU	420	Torque Converter Clutch Brake Switch Signal
3-5	-	-	Not Used
6	BN/WH	379	Cruise Control Clutch Pedal Position Switch Signal (w/M86)
7	L-BU	20	Stop Lamp Supply Voltage
8	-	-	Not Used
9	TN	2759	Fuel Tank Pressure Sensor Low Reference
10-11	-	-	Not Used
12	BN/WH	419	Check Engine Indicator Control
13	D-GN/WH	465	Fuel Pump Primary Relay Control
14-17	-	-	Not Used
18	BN	4	Accessory Voltage
19	PK	1039	Run/Crank Ignition 1 Voltage
20	RD/WH	840	Battery Positive Voltage
21-32	-	-	Not Used
33	WH/BK	1164	Accelerator Pedal Position 5-Volt Reference (1)
34	GY	2709	Fuel Tank Pressure Sensor 5-Volt Reference
35	TN	1274	Accelerator Pedal Position 5-Volt Reference (2)
36	BN	1271	Accelerator Pedal Position Low Reference (1)
37	PU	1272	Accelerator Pedal Position Low Reference (2)
38-39	-	-	Not Used
40	BN	5069	Engine Main Relay Coil Control
41-43	-	-	Not Used
44	PU	1589	Primary Fuel Level Sensor Signal
45-46	-	-	Not Used
47	D-BU	1161	Accelerator Pedal Position Signal (1)
48	D-GN	890	Fuel Tank Pressure Sensor Signal
49	L-BU	1162	Accelerator Pedal Position Signal (2)
50-52	-	-	Not Used
53	D-GN/WH	459	A/C Compressor Clutch Relay Control
54	-	-	Not Used
55	WH	1310	EVAP Canister Vent Solenoid Control
56	YE	447	Starter Relay Coil Control