Test E: The Vehicle Security Module (VSM) Does Not Respond to the Scan Tool

PINPOINT TEST E: THE VEHICLE SECURITY MODULE (VSM) DOES NOT RESPOND TO THE SCAN TOOL

E1-E2:

E3-E4:

Normal Operation
The VSM communicates with the scan tool through the UBP communication network. Circuit 1906 (VT) provides the network connection to the VSM. The VSM shares the UBP network with the electronic automatic temperature control (EATC) module (if equipped), the driver seat module (DSM) (if equipped) and the instrument cluster. Voltage for the VSM is provided by circuits 7 (LG/YE) and 294 (WH/LB). Circuits 57 (BK) and 938 (BK/LG) provide ground.

Possible Causes
- Fuse
- Circuit 7 (LG/YE) open
- Circuit 57 (BK) open
- Circuit 294 (WH/LB) open
- Circuit 938 (BK/LG) open
- Circuit 1906 (VT) open
- VSM