Engine Control Module (ECM) Connector End View/Part Information/Terminal Identification C (MT34)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		AMP 0-368434-1 64-Way F ECU 64P Conn Assembly (32-bit-B) (BK)
Pin	Wire Color	Circuit No.	Function
1	GY	-	5 Volt Reference 2
2	OG/BK	-	5 Volt Reference
3	BN	-	Low Reference
4	L-BU	-	Low Reference
5	L-BU	-	Low Reference
6	GY	-	5 Volt Reference 1
7-8	-	-	Not Used
9	WH	-	Low Reference
10-11	-	-	Not Used
12	OG/BK	-	Ignition 1 Voltage
13	OG/BK	-	Ignition 1 Voltage
14	-	-	Not Used
15	L-BU	-	CPP Switch Signal (M/T)
16	-	-	Not Used
17	RD/WH	-	Battery Positive Voltage
18	RD/WH	-	Battery Positive Voltage
19	BK/WH	-	Ground
20	BK/WH	-	Ground
21	BK/WH	-	Ground
22	BK/WH	-	Ground
23-24	-	-	Not Used
25	D-GN/WH	-	A/C Request Signal
26	L-BU	-	Stop Lamp Switch Output
27	-	-	Not Used
28	PU	-	Stop Lamp Switch Output
29	D-BU	-	APP Sensor 2 Signal
30	L-BU	-	A/C Pressure Sensor Signal
31	BK/WH	-	Serial Data
32	-	-	Not Used
33	PK	-	Ignition 1 Voltage
34	D-BU	-	High Speed Cooling Fan Relay Control
35	PU/WH	-	A/C Clutch Relay Control
36	BN	-	Main Relay Control
37	YE	-	Cruise Indicator Control
38	D-GN	-	Vehicle Speed Signal (M/T)
39-40	-	-	Not Used
41	GY	-	Engine Speed Signal
42	L-GN	-	Fuel Pump Relay Control
43	GY	-	Fuel Level Sensor Signal
44	L-BU	-	APP Sensor 1 Signal
45	GY	-	Cruise Control Switch Signal
46	PU	-	CAN Serial Data High
47	BN/BK	-	Fuel Tank Pressure Sensor Signal
48	D-GN	-	Rough Road Sensor Signal w/o ABS
49	BN/WH	-	MIL Control
50	GY/D-GN	-	Low Speed Cooling Fan Relay Control
51-55	-	-	Not Used
56	D-GN	-	Engine Coolant Temperature Gauge Control
57	BN	-	Heated Oxygen Sensor (HO2S) 2 Heater Control
58-60	-	-	Not Used
61	WH	-	Fuel Gauge Control
62	BN	-	Heated Oxygen Sensor (HO2S) 2 Signal
63	YE	-	CAN Serial Data Low
64	BN	-	Rough Road Signal w/ABS