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

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Precaution for Work




Precaution for Work

- Before connecting or disconnecting differential lock control unit harness connector, turn ignition switch "OFF" and disconnect the battery cable from the negative terminal. Because battery voltage is applied to differential lock control unit even if ignition switch is turned "OFF".





- When connecting or disconnecting pin connectors into or from differential lock control unit, take care not to damage pin terminals (bend or break).





When connecting pin connectors make sure that there are not any bends or breaks on differential lock control unit pin terminal.
- Before replacing differential lock control unit, perform differential lock control unit input/output signal inspection and make sure whether differential lock control unit functions properly or not. Refer to [SDT Function (Diff Lock)] Scan Tool Testing and Procedures.