Engine Control Module (ECM) (LMU) Connector End View

WARNING: This page is about a different car, the 2011 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Engine Control Module (ECM) (LMU) Connector End View

Courtesy of GENERAL MOTORS CORP.

Engine Control Module (ECM) (LMU)

Pin	Wire	Circuit	Function
1	D-GN	534	Idle Air Control (IAC) A High Control
2	L-GN/BK	444	Idle Air Control (IAC) A Low Control
3	BK	50	Ground
4	-	-	Not Used
5	BN	697	Exhaust Gas Recirculation (EGR) Valve Control
6	L-GN	497	Fuel Pump Relay Control
7	OG/BK	441	Ignition 3 Voltage
8	D-GN	135	Engine Coolant Temperature (ECT) Gauge Signal
9	D-BU	473	High Speed Cooling Fan Relay Control
10	D-GN	335	Low Speed Cooling Fan Relay Control
11	BK/WH	51	Ground
12	WH	1876	Low Reference
13	L-BU	733	Low Reference
14	PU	1666	Heated Oxygen Sensor (HO2S) 2 Low Reference
15	BN	467	Low Reference
16	L-BU	466	Low Reference
17	BN	808	Low Reference
18	-	-	Not Used
19	BN	808	Low Reference
20	OG/BK	203	A/C Request Signal (C60)
21	PK	427	Fuel Level Sensor Signal
22	L-GN/WH	630	Camshaft Position (CMP) Sensor Signal
23	-	-	Not Used
24	BK	50	Ground
25	BK/WH	51	Ground
26	-	-	Not Used
27	BN	892	Octane Selector Switch
28	BK	50	Ground
29	PK	539	Ignition 1 Voltage
30	RD/WH	440	Battery Positive Voltage
31	WH	423	Ignition Coil 2 and 3 Control
32	OG	406	Ignition Coil 1 and 4 Control
33	BK	50	Ground
34	-	-	Not Used
35	PK/BK	3113	Heated Oxygen Sensor (HO2S) 1 Signal
36	L-BU	1578	EVAP Canister Vent Solenoid Control
37-38	-	-	Not Used
39	BN/WH	419	Malfunction Indicator Lamp (MIL) Control
40	PU	30	Fuel Gauge Control
41	PU/WH	67	A/C Compressor Clutch Coil Supply Voltage (C60)
42	OG	496	Knock Sensor (KS) Signal
43	-	-	Not Used
44	D-GN/WH	1665	Heated Oxygen Sensor (HO2S) 1 Low Reference
45	GY	5763	Exhaust Gas Recirculation (EGR) Valve Control
46	L-BU	1936	Fuel Level Sensor Signal
47	D-GN	1030	Fuel Tank Pressure Signal (NQU)
48	-	-	Not Used
49	D-BU	732	Evaporator Temperature Sensor Signal
50	L-GN	432	5-Volt Reference
51	D-GN/WH	817	Vehicle Speed Signal
52	D-GN/WH	762	A/C Request Signal (C60)
53	L-BU	830	Rough Road Signal
54	D-BU/WH	1869	Crankshaft Position (CKP) Sensor Signal
55	L-BU	1937	Low Reference
56	BK/WH	2051	Serial Data Signal
57	YE	710	Low Speed GMLAN Serial Data
58	-	-	Not Used
59	L-BU/WH	1747	Fuel Injector 1 Control
60	L-GN/BK	1745	Fuel Injector 3 Control
61	D-BU	417	Idle Air Control (IAC) B High Control
62	PK/BK	415	Idle Air Control (IAC) B Low Control
63	-	-	Not Used
64	BN	3122	Heated Oxygen Sensor (HO2S) 2 Signal
65	BN	428	EVAP Canister Purge Valve Solenoid Control
66	OG	1733	Ignition 1 Voltage
67	BK	50	Ground
68	WH	121	Engine Speed Signal
69	-	-	Not Used
70	YE	492	Deactivation Solenoid Signal
71-73	-	-	Not Used
74	L-BU	425	Throttle Position (TP) Sensor Signal
75	GY/BK	433	Manifold Absolute Pressure (MAP) Sensor Signal
76	YE	410	Engine Coolant Temperature (ECT) Sensor Signal
77	-	-	Not Used
78	RD	468	Intake Air Temperature (IAT) Sensor Signal
79	GY	1031	5-Volt Reference
80	-	-	Not Used
81	D-GN	890	Octane Selection Switch
82	D-BU	809	Low Reference
83	GY	1056	Power Steering Pressure Switch Signal
84	YE	873	Rough Road Sensor Return
85	YE/BK	1868	Low Reference
86	L-BU	1937	Low Reference
87	-	-	Not Used
88	PU	1807	High Speed GMLAN Serial Data
89	BN	1744	Fuel Injector 4 Control
90	PK/BK	1746	Fuel Injector 2 Control

Connector Part Information

OEM: FC1
Service: N/A
Description: 90-Way F Sealed, (BK)

Terminal Part Information

Terminated Lead: Service by Terminal Replacement Only
Release Tool: J-38125-560
Diagnostic Test Probe: J-35616-2A (GY)
Terminal/Tray: 21100251160
Core/Insulation Crimp: Not Available