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

Verifying Customer Complaint

Flow Of Diagnosis:






After verifying the customers complaint, the flow of diagnosis can help you find problems and avoid chasing "ghosts".
1. Technical service bulletins may contain important manufacturer's information.
2. A careful visual inspection can often locate problems without further testing (see CHECKING THE BASICS under TESTING PROCEDURES).
3. Fault codes may lead directly to accurate diagnosis and repair.
4. This list of symptoms and their possible causes can aid in diagnosing problems that do not store trouble codes.
5. Tests are described which will identify problems in specific circuits. See COMPONENT AND CIRCUIT TESTING under TESTING PROCEDURES.


Driveability Worksheet:






DRIVEABILITY WORKSHEET


Repair History (1 Of 2):




Repair History (2 Of 2):






REPAIR HISTORY WORKSHEET