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

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

F1-F2:

F2-F3:

Normal Operation
The DSM communicates with the diagnostic tool through the medium speed controller area network (CAN), circuits 2180 (WH/BK) and 2181 (BK/YE). Check circuits 2180 (WH/BK) and 2181 (BK/YE) between the DSM C341c and the data link connector (DLC) C251. The total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms there is an open in one of the medium speed CAN circuits, damage to the DLC C251, damage to the DSM C341c, or a problem in an in-line connector.

Possible Causes
- medium speed CAN circuit 2180 (WH/BK) open
- medium speed CAN circuit 2181 (BK/YE) open
- DSM
- DSM C341c