Test D: The Driver Seat Module (DSM) Does Not Respond to the Diagnostic Tool

PINPOINT TEST D: THE DRIVER SEAT MODULE (DSM) DOES NOT RESPOND TO THE DIAGNOSTIC TOOL

Test D1-D3:

Normal Operation
The DSM communicates with the diagnostic tool through the universal asynchronous receiver transmitter (UART)-based protocol (UBP) communications network circuit 1906 (VT). Check circuit 1906 (VT) between the DSM C341c and the data link connector (DLC) C251. The total resistance value must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open in circuit 1906 (VT), damage to the DLC C251, damage to the DSM C341c, or a problem in the in-line connector.

Possible Causes
- circuit 1906 (VT) open
- in-line connector
- DLC C251
- DSM C341c
- DSM