Deceleration Shut-off Valve, Checking

Deceleration Shut-off Valve, Checking

Recommended special tools and equipment e.g.:







- VAG1390 hand vacuum pump

Test requirement
- Performance deficiency or tip-in shocks

Test sequence

NOTE: The deceleration shut-off valve is located in front of the turbocharger. It is opened by vacuum during deceleration and at idle.







- Attach VAG1390 vacuum pump to recirculation valve.
- Operate vacuum pump.
- Recirculation valve must open (arrow)
- After approx. 30 seconds, operate vent valve on vacuum pump.
- Recirculation valve must close (arrow)

If recirculation valve does not open or close or valve plate does not seal correctly when valve is closed:
- Replace recirculation valve. Secure connections of recirculation valve using screw clamps.