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

Flow of Diagnosis

Flow Of Diagnosis:




FLOW OF DIAGNOSIS

1. Complete the VEHICLE REPAIR HISTORY and DRIVEABILITY WORKSHEETS to provide better communication between the customer and the mechanic and assist in verifying the customers actual complaint. Refer to INFO TYPE/TECHNICAL MANAGEMENT SUPPORT for the worksheets.

2. Check any Technical Service Bulletins that may apply to the vehicle being serviced. These bulletins may contain important information regarding warranty, recalls, revised service procedures, etc.

3. A careful and thorough visual inspection may reveal the problem without further testing.

4. The On-Board Diagnostics will verify that the ECU sensors and circuits are functioning properly, or display any trouble codes that may be stored in the computer memory.