Engine Control Module (ECM)

The ECM is located in the E-Box in the plenum area on the LH side of the engine compartment attached to the bulkhead.

System ECM has the following inputs:

Engine fueling
Ignition timing
Closed loop fueling
Knock control
Idle speed control
Emission control
On Board Diagnostic
Interface with the immobilization system

The ECM outputs to the following:

Throttle Actuator
Ignition coils (x8)
Oxygen sensor heaters (4)
Fuel injectors (8)
EGR stepper motor
Variable Valve Timing Oil Valves (2)
Purge Valve
Engine Cooling Fan
Fuel pump relay
Starter Relay
Air conditioning condenser fan module
EMS Main Relay
Viscous Fan Control
Generator Control
Power Assisted Steering
Diagnostic Module Tank Leakage (DMTL) (NAS Only)

ECM Connector C0634 Pin Out Table

Pin No	Description	Input/Output
1	CAN	Input/Output
2	CAN	Input/Output
3	Generator monitor	Input
4	UHEGO Bank A ground	-
5	UHEGO Bank B ground	-
6	Not used	-
7	Not used	-
8	Not used	-
9	Not used	-
10	Not used	-
11	CKP ground	-
12	CMP sensor bank A ground	-
13	CMP sensor bank B ground	-
14	UHEGO sensor bank B signal	Input
15	Electronic throttle body ground	-
16	MAF ground	-
17	HEGO ground	-
18	Not used	-
19	Knock sensor 1 ground	-
20	Knock sensor 2 ground	-
21	Knock sensor 3 ground	-
22	Knock sensor 4 ground	-
23	Electronic throttle body 5V supply	Output
24	Fuel pump relay	Output
25	Not used	-
26	Not used	-
27	Not used	-
28	Not used	-
29	Radiator temperature sensor	Input
30	Crank sensor signal	Input
31	Not used	-
32	Not used	-
33	CMP signal bank B	Input
34	CMP signal bank A	Input
35	Not used	-
36	UHEGO signal bank A	Input
37	UHEGO signal bank A ground	-
38	UHEGO signal bank B ground	-
39	Fuel temperature sensor	Input
40	Fuel pressure sensor	Input
41	Not used	Input
42	Not used	Input
43	Knock sensor 1 +	Output
44	Knock sensor 2 +	Output
45	Knock sensor 3 +	Output
46	Knock sensor 4 +	Output
47	Generator control	Output
48	E-box fan	Output
49	Not used	-
50	EGR stepper motor 4	Output
51	EGR stepper motor 3	Output
52	EGR stepper motor 2	Output
53	EGR stepper motor 1	Output
54	Ignition coil cylinder 4 B	Output
55	Ignition coil cylinder 4 A	Output
56	Ignition coil cylinder 3 B	Output
57	Not used	-
58	Not used	-
59	Not used	-
60	Not used	-
61	Not used	-
62	Not used	-
63	Not used	-
64	Not used	-
65	Not used	-
66	Not used	-
67	Not used	-
68	Not used	-
69	Not used	-
70	MAF	Input
71	Purge valve	Output
72	Starter relay -	-
73	Throttle body power supply	Output
74	Throttle valve open direction -	Output
75	Throttle valve open direction +	Output
76	UHEGO Heater bank A	Output
77	UHEGO Heater bank B	Output
78	Injector cylinder 4B	Output
79	Injector cylinder 4A	Output
80	Injector cylinder 3B	Output
81	Injector cylinder 3A	Output
82	Injector cylinder 2B	Output
83	Injector cylinder 2A	Output
84	Injector cylinder 1B	Output
85	Injector cylinder 1A	Output
86	VVT bank A	Output
87	VVT bank B	Output
88	Viscous fan control	Output
89	Not used	-
90	Oil temperature sensor	Input
91	Throttle body monitor signal	Input
92	Starter motor relay +	Output
93	Not used	-
94	Viscous fan request	Input
95	Purge valve	Output

ECM Connector C0635 Pin Out Table

Pin No	Description	Input/Output
1	Signal ground 1	-
2	Power ground 1	-
3	Power ground 3	-
4	Power ground 2	-
5	ECM power	Input
6	APP sensor ground 1	-
7	APP sensor ground 2	-
8	Not used	-
9	Not used	-
10	Not used	-
11	Not used	-
12	Park/Neutral signal	Input
13	Not used	-
14	Not used	-
15	Not used	-
16	EMS relay	Output
17	Crank request	Output
18	CAN +	Output
19	APP sensor 2 power	Output
20	Fuel pump control	Output
21	Not used	-
22	Not used	-
23	Not used	-
24	APP sensor 1 signal	Output
25	Not used	-
26	Brake light switch	Input
27	Not used	-
28	Not used	-
29	Not used	-
30	Ignition switch	Input
31	CAN +	Input
32	APP sensor 1 power	Output
33	DMTL	Output
34	Not used	-
35	Speed switch -	Output
36	Speed switch +	Input