Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Test B: No Communication With The Driver Seat Module (DSM)

PINPOINT TEST B: NO COMMUNICATION WITH THE DRIVER SEAT MODULE (DSM)


Test B1-B2:






Normal Operation
The DSM receives voltage on circuits 566 (DG), 956 (OG/LG) and ground on circuits 1203 (BK/LB) and 1205 (BK).

Possible Causes
- circuit 1205 (BK) open
- circuit 566 (DG) open
- circuit 1203 (BK/LB) open
- circuit 956 (OG/LG) open