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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Test B: No Communication With The Vehicle Security Module

PINPOINT TEST B: NO COMMUNICATION WITH THE VEHICLE SECURITY MODULE


B1-B2:






B2 Continued:






Normal Operation
The vehicle security module controls the remote keyless entry (RKE), the power locks, and the vehicle security. The vehicle security module receives voltage through the battery junction box (BJB) fuse 2 (10A). Voltage is delivered from the fuses to the module through circuits 456 (DG/OG), 645 (WH/LB) and is grounded on circuit 1205 (BK).

Possible Causes
- BJB fuse 2 (30A)
- CJB fuse 2 (10A)
- vehicle security module