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 VEHICLE SECURITY MODULE


B1-B3:






B3 Continued:






Normal Operation
The vehicle security module receives voltage from the central junction box (CJB) through circuits 7 (LG/YE) and 294 (WH/LB). The vehicle security module is grounded through circuits 57 (BK) and 938 (BK/LG).

Possible Causes
- fuse(s)
- circuit 7 (LG/YE) open
- circuit 57 (BK) open
- circuit 294 (WH/LB) open
- circuit 938 (BK/LG) open
- vehicle security module