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)

Or, hide this message: temporarily or permanently

Checking Power Supply




Checking Power Supply







- Disconnect the VCT 2000 from the data link connector (DLC)
- Ignition on.

Connect a voltmeter between data link connector (DLC) #16 and ground

The voltmeter should read battery voltage.

OK - Checking Function

Not OK - Checking For an Open-Circuit