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

System Overview, Bus







System overview, bus
- Transmission range switch (245)
- Main instrument unit (540)
- Trionic control module (430, 589)
- SID (541)
- Control module, TCM (502)
- Switch, WINTER (506)
- Switch, SPORT (537)
- TWICE control module (632)
- Output shaft speed sensor (533)
- Input shaft speed sensor (532)
- Transmission fluid temperature sensor (535)
- Lock-Up solenoid (SL)
- Shift solenoid (S1)
- Shift solenoid (S2)
- System pressure solenoid (ST)