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

With Generic Scan Tool




Three Way Catalytic Converter (TWC), Checking

Function test
- Select the measuring value "Test-ID 01: Catalytic converter" and check whether the specified values are being reached, Diagnostic mode 6: Check test results of components that are not continuously monitored.
Diagnostic Mode 6: Check Test of Parts Not Constantly Monitored

- End diagnosis and switch ignition off.

If the specified values are exceeded:
- Replace the front exhaust pipe with catalytic converter:
- Vehicles with engine code AFP, item 10,
- Vehicles with engine code BDF, item 14.

Continuation for all vehicles
- Erase DTC memory of Engine Control Module (ECM), Diagnostic mode 4: Reset/erase diagnostic data.
Clearing Diagnostic Trouble Codes


- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes