Exhaust Flap, Checking

Exhaust Flap, Checking

Special tools, testers and auxiliary items required







- Vehicle diagnostic, testing, and information system VAS 5051B

Test sequence
- Let engine run briefly so that the required vacuum for the test is present in vacuum reservoir.
- Switch engine off and connect Vehicle Diagnosis, Testing and Information System VAS 5051B.
- Switch ignition on.
- Press Vehicle Self-Diagnosis button, select vehicle system "01 - Engine electronics" and activate with -> button.







Display on VAS 5051B :
- In selection - 1 - , press "011 - Measured values" and activate by pressing -> button.
- Press -> button repeatedly until Exhaust Flap Valve 1 N321 is activated.







- Operating rod - arrow - for exhaust flap must move back and forth at both rear mufflers.

If actuator rod does not move:
- Check exhaust flap vacuum reservoir. Testing and Inspection
- Check vacuum line to vacuum reservoir and to Exhaust Flap Valve 1 N321 under left side trim in luggage compartment.
- Check Exhaust Flap Valve 1 N321 in "Guided Fault Finding" operating mode.
- End function "03 - Output Diagnostic Test Mode (DTM)" by pressing -> button.
- Press "06 - End Output".
- Switch off ignition.