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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Signal Specification, Transmission Control Module (TCM)






Signal specification
All values listed below are between the terminal in column 1 and terminal #A9 (#39 on the breakout box), unless otherwise indicated in brackets.

Note! Connect the breakout box and check the ground terminals before taking readings.





- Connector A (16-pin) corresponds to terminals #31 - #46 on the breakout box
- Connector B (4-pin) corresponds to terminals #51 - #54 on the breakout box
- Connector C (22-pin on transmission side) corresponds to terminals #1 - #22 on the breakout box.