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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Display Group 002








Test table display group 002





Notes on display field 3:
- The mechanical Closed Throttle Position (CTP) switch must be closed for the testing on the throttle position sensor learning values display field 4.
- If the displays in display fields 2 and 3 match at idle, the learning process is OK. If no learning process takes place, the last value learned will be displayed continuously.
- If ECM is without power, the throttle position sensor learning value will be set to 0.550 V.