Test J: The Driver Seat Module (DSM) Does Not Respond To The Scan Tool

PINPOINT TEST J: THE DRIVER SEAT MODULE (DSM) DOES NOT RESPOND TO THE SCAN TOOL

Normal Operation
The DSM communicates with the scan tool through the medium speed controller area network (MS-CAN). Circuits VDB06 (GY/OG) (MS-CAN +) and VDB07 (VT/OG) (MS-CAN -) provide the network connection to the DSM. The DSM shares the MS-CAN network with the smart junction box (SJB), the electronic automatic temperature control (EATC) or electronic manual temperature control (EMTC) module, the audio unit, the power liftgate module, the digital versatile disc (DVD) player, the satellite radio receiver, and the instrument cluster. Voltage and ground for the DSM is provided by circuits SBB32 (VT/RD) and SBP12 (GN/RD). Circuits GD147 (BK/VT) provides ground.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- DSM

J1:

J1-J2:

J2-J3:

J4: