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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Checking the Communication Cable




Checking The Communication Cable







- Ignition off.
- Connect control module.
- Ignition on.

Connect a voltmeter between data link connector (DLC) terminal 7 and ground.

The voltmeter should read approximately 9-11 V

Low - Checking For A Short-Circuit

High - Checking For A Short-Circuit

OK - Checking Communication With VGLA