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

Preparation For Test



Preliminary Work:
- Perform Diagnosis, check Diagnostic Trouble Code (DTC) Memory.

Preparation for Test:
1. Fuses OK.
2. Battery voltage > 11 V.
3. Install model specific HHT module into HHT.
4. Voltage to control modules and CAN data lines ok.
5. Connect the Hand-Held Tester (HHT) to X11/4.
6. Electrical wiring diagrams.





Special Tools

Conventional Tools, Test Equipment:
Description Brand, model, etc.
Multimeter 1) Fluke models 23, 83, 85, 87, 88

1) Available through the MBNA Standard Equipment Program