E 250 V8-5.4L (2008)
C5
Test D: The Vehicle Security Module (VSM) Does Not Respond To The Scan Tool
PINPOINT TEST D: THE VEHICLE SECURITY MODULE (VSM) DOES NOT RESPOND TO THE SCAN TOOL
Normal Operation
The VSM communicates with the scan tool through the medium speed controller area network (MS-CAN). Circuits 2180 (WH/BK) (MS-CAN +) and
2181 (BK/YE) (MS-CAN -) provide the network connection to the VSM. The VSM shares the MS-CAN with the IC. Voltage for the VSM is
provided by circuits 517 (BK/WH), 640 (RD/YE) and 295 (LB/PK). Circuits 57 (BK) and 1205 (BK) provide ground.
This pinpoint is intended to diagnose the following:
-
Fuse
-
Wiring, terminals or connectors
-
VSM
D1-D2
