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:






Normal Operation
The DSM receives voltage from the battery junction box (BJB) through circuit SBB15 (WH/RD). The DSM is grounded through circuit GD126 (BK/WH).

Possible Causes
- fuse
- circuit GD126 (BK/WH) open
- circuit SBB15 (WH/RD) open