SCHEMATICS SCHEMA TICS AND DIA D IAGRAMS GRAMS SYSTEM CONNECTORS The V-MAC IV system utilizes many different connector styles and sizes. The Engine Management System (EMS) Module, Instrument Cluster Module (ICM), and the Vehicle Electronic Control Unit (VECU) are some of the largest connectors in the system. These connectors and control units are where the majority of the V-MAC IV system testing is performed. This section illustrates the EMS Module, ICM, and Vehicle Electronic Control Unit (VECU) connectors and includes charts with connector terminal identification and functions. The charts should not be used as a replacement for the detailed tests that appear in this manual. The charts are intended as an identification reference for use when repairing a connector or terminal.
Engine Management System (EMS) Module The Engine Management System (EMS) Module has two 62 pin connectors. To disconnect a connector from the EMS Module, pull back ba ck on the connector lock and gently pull the connector back on its heel and away from the EMS Module. For easy reference, the following illustration shows each pin number as it appears on the connector. Be sure that the connector is aligned as shown below to avoid confusion when checking pin numbers. The connector numbers and EMS Module orientation are shown as a reference for reconnecting the EMS Module to the engine harness.
507
Figure 507 — EMS Connectors
Page 514
January 2009
SCHEMATICS AND DIAGRAMS ENGINE MANAGEMENT SYSTEM (EMS) MODULE EMS Module Connector A PIN Number
Description
EMS Module Connector A PIN Number
Description
37
Crank speed sensor (-)
38
Crank speed sensor (+)
1
Not used
39
Fan speed sensor (-)
2
Not used
40
Spill Valve (SV) injector 6 (output)
3
Water In Fuel Filter (WIFF) valve
41
Turbo speed sensor (+)
4
Not used
42
Turbo speed sensor (-)
5
Not used
43
Humidity temp signal
6
Not used
44
7
5 volt reference signal
Needle Control Valve (NCV) injector 5 (output)
8
Not used
45
CAM speed sensor (+)
9
Not used
46
CAM speed sensor (-)
10
Not used
47
Boost temperature signal
11
5 volts reference ground
48
Spill Valve (SV) injector 5 (output)
12
Needle Control Valve (NCV) injector 2 (output)
49
Not used
50
Not used
13
Not used
51
Not used
14
Not used
52
15
Not used
Needle Control Valve (NCV) injector 4 (output)
16
Spill Valve (SV) injector 2 (output)
53
Not used
17
Not used
54
Not used
18
Not used
55
Not used
19
Not used
56
Spill Valve (SV) injector 4 (output)
20
NCV injector 1 (output)
57
Ground (-)
21
Not used
58
Not used
22
Boost pressure signal
59
Spill Valve (SV) common 1,2,3 injectors
23
Humidity sensor signal
60
Spill Valve (SV) common 4,5,6 injectors
24
Spill Valve (SV) injector 1 (output)
61
Needle Control Valve (NCV) injector common 4,5,6 injectors
25
Not used
62
26
Not used
Needle Control Valve (NCV) injector common 1,2,3 injectors
