Engine Control Module (ECM) Connector End View C1

Fig 1: Connector End View

Courtesy of GENERAL MOTORS CORP.

Connector Part Information

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

Terminal Part Information  Pins: 2, 6, 7, 9, 12, 13, 18-20, 33-37, 40, 44, 47-49, 53, 55, 56 Terminal/Tray: 15359541/4 Core/Insulation Crimp: M/M Release Tool/Test Probe: 15381651-2/J-35616-64B (L-BU)

Connector Terminal Identification

Pin	Wire Color	Circuit No.	Function
1	-	-	Not Used
2	PU	420	TCC Brake Switch/Cruise Control Release 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	Low Reference
10-11	-	-	Not Used
12	BN/WH	419	MIL Control
13	D-GN/WH	465	Fuel Pump Relay Control (- Primary)
14-17	-	-	Not Used
18	BN	4	Accessory Voltage
19	PK	1039	Ignition 1 Voltage
20	RD/WH	840	Battery Positive Voltage
21-32	-	-	Not Used
33	WH/BK	1164	5-Volt Reference
34	GY	2709	5-Volt Reference
35	TN	1274	5-Volt Reference
36	BN	1271	Low Reference
37	PU	1272	Low Reference
38-39	-	-	Not Used
40	BN	5069	Powertrain Relay Control
41-43	-	-	Not Used
44	PU	1589	Fuel Level Sensor Signal (+ Primary)
45-46	-	-	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	-	-	Not Used
55	WH	1310	EVAP Canister Vent Solenoid Control
56	YE	447	Starter Relay Coil Control