Engine Control Module (ECM) Connector End View/Part Information/Terminal Identification M (MR140)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		AMP 1-368434-1 64-Way F ECU 64P Conn Assembly (32-bit-B) (BK)
Pin	Wire Color	Circuit No.	Function
1	WH	-	Ignition Coil 2 and 3 Control
2	BN	-	Heated Oxygen Sensor 2 Heater Control
3	PK	-	Ignition 1 Voltage
4	BN	-	EVAP Canister Purge Solenoid Control
5	YE/BK	-	Low Reference
6	L-BU	-	Throttle Position Sensor Signal
7	BN	-	Intake Air Temperature (IAT) Sensor Signal
8	L-GN	-	Exhaust Gas Recirculation (EGR) Valve Signal
9	GY	-	Exhaust Gas Recirculation (EGR) Valve Position Sensor Signal
10	-	-	Not Used
11	PU/D-BU	-	Fuel Injector #4 Control
12	GN/WH	-	Heated Oxygen Sensor 1 Low Reference
13	GN	-	High Idle Switch Output
14	PK/D-BU	-	Idle Air Control (IAC) Valve Coil B Low Control
15	L-GN/BK	-	Idle Air Control (IAC) Valve Coil A Low Control
16	PU	-	5-Volt Reference
17	-	-	Not Used
18	D-BU	-	Knock Sensor Signal
19	WH	-	Exhaust Gas Recirculation Valve Control
20	-	-	Not Used
21	D-BU/WH	-	Crankshaft Position Sensor Signal
22	BN	-	Fuel Injector #2 Control
23	-	-	Not Used
24	L-GN/D-BU	-	Fuel Injector #3 Control
25	D-BU/WH	-	Fuel Injector #1 Control
26	L-BU/BK	-	Camshaft Position Sensor Signal
27	-	-	Not Used
28	YE	-	Engine Coolant Temperature Sensor Signal
29	BN	-	Heated Oxygen Sensor 1 Signal
30	BU	-	Idle Air Control (IAC) Valve Coil B High Control
31	-	-	Not Used
32	PK	-	5-Volt Reference
33	WH	-	Ignition Coil 2 and 3 Control
34	-	-	Not Used
35	OG	-	Ignition Coil 1 and 4 Control
36	-	-	Not Used
37	BK	-	Ground
38	BK	-	Ground
39	BK	-	Ground
40	BK	-	Ground
41	BK	-	Ground
42-47	-	-	Not Used
48	BN/WH	-	Low Reference
49-50	-	-	Not Used
51	OG	-	Ignition Coil 1 and 4 Control
52	WH	-	Exhaust Gas Recirculation Valve Control
53-63	-	-	Not Used
64	BN	-	Low Reference