Checking Mass Air Flow When Under Partial Load

Checking Mass Air Flow When Under Partial Load









- Turn the Ignition switch to the OFF position.

Plug in the connector:
EVAP canister purge valve
- Drive the car in top gear with a steady high engine load.
- Driving uphill is recommended.
- Read value: Airmass Deviation from Calculated (Trionic).





- State what the diagnostic tool shows:

15% to 25% - Checking Air Leakage Before Flap

Other value - Checking the Fuel Supply