With Generic Scan Tool

EVAP canister system, checking for proper seal

Function test

- Select the measuring value "Test-ID 01: Tank leak test" and check whether the specified value is being reached, Diagnostic mode 8: Tank leak test. Diagnostic Mode 8: Tank Leak Test
- Check specified value of tank leak test at idle.
Specified value: Test OK


NOTE:
- The function test can take a few minutes.
- If the accelerator pedal is depressed during the test, the test will be aborted.
- To repeat the tank leak test, switch ignition off and start engine again and let run at idle.


- End diagnosis and switch ignition off.

If specified value is not obtained:

Checking Proper Seal

If a small or large leak was recognized during the test of the EVAP canister system, proceed as follows.
- DIsconnect hose from diagnostic pump for fuel system at EVAP canister and seal it
- Repeat function test.

If malfunction persists:
- Remove wheelhousing liner, rear left.
- Check the connection lines and hoses between diagnostic pump for fuel system and EVAP canister for proper seal
- Repeat function test.

If malfunction persists:
- Check whether the fuel filler cap is completely closed or whether the seal leaks, replace if necessary.
- Check whether the union nut of the Fuel Pump (FP) is tightened or whether the sealing ring is leaking; replace if necessary
- Repeat function test.

If malfunction persists:
- Remove EVAP canister and check for cracks and leaks, replace if necessary
- Check connecting lines and hoses between EVAP canister and fuel flap unit or Evaporative Emission (EVAP) Canister Purge Regulator Valve
- Check hoses and hose clamps for secure seating.
- Repeat function test.

If malfunction is no longer present:
- Erase DTC memory of Engine Control Module (ECM)
- Generate readiness code.