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

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Pinpoint Tests

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


B1-B2:






B2-B4:






Normal Operation
The DSM receives voltage from the central junction box (CJB) through circuits 566 (DG) and 956 (OG/LG). The DSM is grounded through circuits 875 (BK/LB) and 57 (BK).

Possible Causes
- fuse(s)
- circuit 57 (BK) open
- circuit 566 (DG) open
- circuit 875 (BK/LB) open
- circuit 956 (OG/LG) open
- DSM