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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Control Modules

Connecting disconnecting control modules




Always switch off the ignition before connecting or disconnecting a connector or the test box to a control module.





Temperature
The control module must not be heated to above 80 °C. Remove control module when stoving for example.

Arc welding
Disconnect connector from control modules when arc welding.

Remove control module before carrying out any arc welding work close to it.

Replacing
Do not replace a control module without checking its wiring and components. The new component may be damaged in the same way as the old one.