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

Control Module Inputs, Bus



Control Module Inputs, Bus


Cars with petrol engines.


Control Module Inputs, Bus:






Cars with diesel engines.


Control Module Inputs, Bus:






- Electric rear window confirmation (DICE, 628).
- Passenger seat occupied (TWICE, 632).
- Vehicle speed (MIU, 540).
- Unit (SID, 541).
- Language (SID, 541).
- Rheostat value (SID, 541).
- Rheostat value, night panel (SID, 541).
- Night panel (SID, 541).
- Display lighting (SID, 541).
- Time engine not running (SID, 541).
- Steering wheel location (TWICE, 632).
- Outside temperature (SID, 541).
- Engine running (TRIONIC, 430).
- Engine speed (TRIONIC, 430).
- Coolant temperature (TRIONIC, 430).
- Diagnosis (DICE, 628/diagnostic tool).