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

Accessing Expanded Diagnostic Protocols

ACCESSING EXPANDED DIAGNOSTIC PROTOCOLS
- Perform the necessary vehicle preparation and visual inspection.
- Make sure New Generation Star (NGS) software version is the newest release.
- Select GENERIC OBD II FUNCTIONS.
- Press CONT to continue to next screen.
- Select EXPANDED DIAGNOSTIC PROTOCOL.
- Press NEW to begin entering characters.
- Use SCROLL DIAL to select characters.
- Press TRIGGER to enter characters.
- Press EXIT when done entering characters.
- Press RUN to begin viewing.

NOTE: If an error occurs, make sure string is entered exactly as written in EDP table.

- When finished, turn ignition key into the OFF position.
- Disconnect NGS from vehicle.