Engine Control Module (ECM)

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

The ECM has the following inputs:

RCM
Park/neutral switch
Ignition coil feedback x2
Fuel rail temperature
Mass air flow
Engine speed
Camshaft position x2
Driver demand
Brake pedal position switch
Speed control switches
Generator load
Oxygen sensors pre catalyst x2
Oxygen sensors post catalyst x2
Throttle position
Cooling fan speed
Ignition switch position
Knock sensors x2
MAP
Coolant temperature
Engine oil temperature

The ECM outputs to the following:

Throttle Actuator
Brake vacuum pump relay
Ignition coils (x8)
Oxygen sensor heaters (4)
Fuel injectors (8)
Purge Valve
Engine Cooling Fan
Fuel pump relay
Starter Relay
EMS Main Relay
Viscous Fan Control
Generator Control
Diagnostic Module Tank Leakage (DMTL) (NAS Only)
E box fan

ECM Connector C0634 Pin Out Table

Pin No	Description	Input/Output
1	Not used	-
2	Not used	-
3	Generator monitor	Input
4	Not used	-
5	Not used	-
6	CKP sensor -	Input
7	CMP sensor 1ground (GND)	-
8	CMP sensor 2GND	-
9	Not used	-
10	throttle position (TP) sensor GND	-
11	MAP sensor ground	-
12	fuel rail pressure (FRP) sensor ground	-
13	Not used	-
14	Not used	Input
15	ECT ground	-
16	Not used MAF ground	-
17	Not used	-
18	MAF sensor ground	-
19	Knock sensor 1A ground	-
20	Knock sensor 1B ground	-
21	Not used	-
22	Not used	-
23	Oil temperature sensor	Input
24	Not used	-
25	Not used	-
26	UHEGO sensor bank B signal	Input
27	UHEGO sensor bank B GND	-
28	UHEGO sensor bank A signal	Input
29	UHEGO sensor bank A GND	-
30	CKP sensor +	Input
31	Not used	-
32	Not used	-
33	CMP signal bank B	Input
34	CMP signal bank A	Input
35	Not used	-
36	Not used	-
37	Not used	-
38	Not used	-
39	Not used	Input
40	Not used	Input
41	Not used	Input
42	Knock sensor 1 A +	Input
43	Knock sensor 1 B +	Input
44	Not used	-
45	Not used	-
46	Fuel rail temperature sensor	Input
47	Not used	-
48	MAP sensor 5 V ref voltage	Output
49	Not used	-
50	EGR 4	Output
51	EGR 3	Output
52	EGR 2	Output
53	EGR 1	Output
54	Ignition coil cylinder 4B	Output
55	Ignition coil cylinder 4A	Output
56	Ignition coil cylinder 3B	Output
57	Ignition coil cylinder 3A	Output
58	Ignition coil cylinder 2B	Output
59	Ignition coil cylinder 2A	Output
60	Ignition coil cylinder 1B	Output
61	Ignition coil cylinder 1A	Output
62	Ignition failure signal bank A	Input
63	Viscous fan speed monitor	Input
64	Ignition failure signal bank B	Input
65	TP sensor 1	Input
66	MAF	Input
67	TP sensor 2	Input
68	ECT	Input
69	Inlet manifold boost pressure	Input
70	MAF	Input
71	Not used	-
72	Electric throttle 5V reference	Output
73	Not used	-
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 1A	Output
79	Injector cylinder 1B	Output
80	Injector cylinder 2A	Output
81	Injector cylinder 2B	Output
82	Injector cylinder 3A	Output
83	Injector cylinder 3B	Output
84	Injector cylinder 4A	Output
85	Injector cylinder 4B	Output
86	VVT control bank A	Output
87	VVT control bank B	Output
88	Not used	-
89	Not used	-
90	Not used	-
91	Not used	-
92	Purge valve	Output
93	Viscous fan request	Output
94	E box fan	Output
95	Fuel pump relay	Output
96	Generator control	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	Output
6	Electric throttle power	Input
7	APP sensor ground 1	-
8	APP sensor ground 2	-
9	Not used	-
10	Not used	-
11	Not used	-
12	Not used	-
13	Not used	-
14	Not used	-
15	Park/Neutral signal	Input
16	EMS relay	Output
17	Crank request	Input
18	Not used	-
19	APP sensor 2 5V ref	-
20	Not used	-
21	Not used	Input
22	HEGO sensor A GND	-
23	DMTL heater	Output
24	APP sensor 1 signal	Output
25	HEGO sensor A	Input
26	HEGO sensor B	Input
27	Not used	-
28	RCM	Input
29	Not used	-
30	Ignition switch	Input
31	Not used	-
32	APP sensor 1 5V reference	Output
33	DMTL pump	Output
34	HEGO sensor B GND	-
35	Speed control switch -	Output
36	Speed control switch +	Input
37	Not used	-
38	APP sensor 2 demand	Input
39	Not used	-
40	Not used	-
41	Brake pedal switch	Input
42	Not used	-
43	Not used	-
44	CAN out -	Input/output
45	CAN in -	Input/output
46	HEGO heater A	Output
47	HEGO heater B	Output
48	DMTL valve	Output
49	Not used	-
50	Vacuum pump relay	Output
51	Starter relay	Output
52	Not used	-
53	Not used	-
54	Battery voltage	Input
55	Not used	-
56	Not used	-
57	CAN out +	Input/output
58	CAN in +	Input/output