ECM Connector End View C1

ECM C1

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		15452125 56-Way F Micro 64 Sealed (BU)
Pin	Wire Color	Circuit No.	Function
1	PU	1589	Fuel Level Sensor Signal
2	L-BU	1162	APP Sensor 2 Signal
3	D-GN	890	Fuel Tank Pressure Sensor Signal
4	D-BU	1161	APP Sensor 1 Signal
5	-	-	Not Used
6	D-GN	1433	PNP/Clutch Start Switch Signal
7	-	-	Not Used
8	BN/WH	379	CPP Switch Signal
9	PU	420	TCC Brake Switch/Cruise Control Release Signal
10	WH/BK	1164	5-Volt Reference
11	L-BU	20	Stop Lamp Switch Signal
12	BN	4	Accessory Voltage
13	GY	705	5-Volt Reference
14	D-GN/WH	465	Fuel Pump Relay Control
15	D-BU	1884	Cruise Control Switch Signal
16	PU	1807	Class 2 Serial Data
17	PU	1807	Class 2 Serial Data (ABS)
18	BN	5069	Main Relay Control
19-26	-	-	Not Used
27	YE	1139	Ignition 1 Voltage
28	-	-	Not Used
29	PU	421	Air Solenoid Control (NU3)
30	WH	1310	EVAP Canister Vent Solenoid Control
31	D-GN/WH	459	A/C Compressor Clutch Relay Control
32-40	-	-	Not Used
41	PU	1272	Low Reference
42-44	-	-	Not Used
45	BN/WH	419	MIL Control
46	YE	447	Starter Relay Coil Control
47-50	-	-	Not Used
51	OG	480	Battery Positive Voltage
52	-	-	Not Used
53	BN	1271	Low Reference
54	BK	2759	Low Reference
55	-	-	Not Used
56	TN	1274	5-Volt Reference