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:

D2-D3:

D4: