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)

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Test R: No Communication With the Restraints Control Module

R1 - R2:

R3 - R4:

R5:

Normal Operation
The RCM communicates with the scan tool using ISO 9141 communication mode through the Data Link Connector (DLC).

Possible Causes
A no communication condition can be caused by:
^ damage to circuit 70 (LB/WH).
^ a damaged DLC.
^ a damaged scan tool.
^ an RCM internal concern.