Engine Control Module Connector End Views (w/o Throttle Actuator Control)

Engine Control Module (ECM) K (MR-140)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		AMP 0-368434-2 64-Way F ECU 64P Conn Ass'y (32-bit-B)
Pin	Wire Color	Circuit Number	Function
1	OG	440	Battery Positive Voltage
2-4	-	-	Not Used
5	BK/WH	51	Ground
6	D-GN/WH	817	Vehicle Speed Signal (Manual Transmission)
7	D-BU	876	Rough Road Signal - W/ABS
8-11	-	-	Not Used
12	D-BU	473	High Speed Cooling Fan Relay Control
13	WH/BK	962	Intake Manifold Tuning Valve Solenoid Control
14	PU	1807	CAN Serial Data High
15	YE	710	CAN Serial Data Low
16	BN/WH	1669	Heated Oxygen Sensor (HO2S) 1 Heater Control
17	OG	440	Battery Positive Voltage
18	PK/BU	539	Ignition 1 Voltage
19-20	-	-	Not Used
21	D-GN	602	Rough Road Sensor Signal
22	L-BU	380	A/C Refrigerant Pressure (ACP) Sensor Signal
23	-	-	Not Used
24	D-GN	135	Engine Coolant Temperature (ECT) Sensor Gage Signal
25	GY (WH)	121	Engine Speed Signal
26-27	-	-	Not Used
28	D-GN/WH (D-GN)	335	Low Speed Cooling Fan Relay Control
29	D-GN (PU)	67	A/C Compressor Clutch Coil Supply Voltage
30	WH	30	Fuel Level Sensor Signal
31	-	-	Not Used
32	PU	2000	Keyword Serial Data
33	-	-	Not Used
34	PU/WH	632	Low Reference
35	D-GN/WH	762	A/C Request Signal
36	PU	1670	Heated Oxygen Sensor (HO2S) 2 Signal
37-49	-	-	Not Used
50	GY	605	5-Volt Reference
51	GY	1936	Fuel Level Sensor Signal
52	YE/D-GN	890	Fuel Tank Pressure Sensor Signal
53	L-GN	413	Heated Oxygen Sensor (HO2S) 2 Low Reference
54	L-GN (D-GN/WH)	465	Fuel Pump Relay Control
55-63	-	-	Not Used
64	BN/WH	419	Malfunction Indicator Lamp (MIL) Control

Engine Control Module (ECM) M (MR-140)

Courtesy of GENERAL MOTORS CORP.
Connector Part Information		AMP 1-368434-1 64-Way F ECU 64P Conn Ass'y (32-bit-B)
Pin	Wire Color	Circuit Number	Function
1	L-BU	406	Ignition Coil (IC) Timing Control 1 and 4
2	BN/BK	1671	Heated Oxygen Sensor (HO2S) 2 Heater Control
3	GY	120	Fuel Pump Supply Voltage
4	WH	428	Evaporative Emissions (EVAP) Canister Purge Solenoid Control
5	YE/BK	1868	Low Reference
6	GY (D-BU)	417	Throttle Position (TP) Sensor Signal
7	GY (BN)	472	Intake Air Temperature (IAT) Sensor Signal
8	D-BU/WH (L-GN)	432	Manifold Absolute Pressure (MAP) Sensor Signal
9	WH/BK	1456	Exhaust Gas Recirculation (EGR) Valve Position Signal
10	-	-	Not Used
11	D-GN/WH (L-BU/BK)	844	Fuel Injector 4 Control
12	GY	1653	Heated Oxygen Sensor (HO2S) 1 Signal
13	BN	1747	Idle Air Control (IAC) A High Control
14	WH	444	Idle Air Control (IAC) B Low Control
15	YE/WH	1748	Idle Air Control (IAC) A Low Control
16	L-BU/BK	1688	5-Volt Reference
17	-	-	Not Used
18	YE/BK	496	Knock Sensor Signal
19	D-GN	435	Exhaust Gas Recirculation (EGR) Solenoid Low Control
20	-	-	Not Used
21	D-BU/WH	1869	Crankshaft Position (CKP) Sensor Signal
22	BN/WH (L-GN/BK)	1745	Fuel Injector 2 Control
23	-	-	Not Used
24	D-GN/BK (PK/BK)	1746	Fuel Injector 3 Control
25	YE/D-BU (BK)	1744	Fuel Injector 1 Control
26	PU (BN/WH)	633	Camshaft Position (CMP) Sensor Signal
27	-	-	Not Used
28	L-GN (YE)	410	Engine Coolant Temperature (ECT) Sensor Signal
29	D-GN/RD	1665	Heated Oxygen Sensor (HO2S) 1 Low Reference
30	PU/WH	1749	Idle Air Control (IAC) Coil B High Control
31	-	-	Not Used
32	D-GN/WH (D-GN/YE)	416	5-Volt Reference
33	L-BU	406	Ignition Coil (IC) Timing Control (1 and 4)
34	-	-	Not Used
35	D-GN/WH	423	Ignition Coil (IC) Timing Control (2 and 3)
36	-	-	Not Used
37	BK/WH	51	Ground
38	BK/WH	51	Ground
39	BK/WH	51	Ground
40	BK/WH	51	Ground
41	BK/WH	51	Ground
42-47	-	-	Not Used
48	OG/BK	469	Low Reference
49-50	-	-	Not Used
51	D-GN/WH	423	Ignition Coil (IC) Timing Control (2 and 3)
52	D-GN	435	Exhaust Gas Recirculation (EGR) Low Control
53-63	-	-	Not Used
64	BK (BK/YE)	808	Low Reference