Deceleration Shut-Off Valve, Checking

Deceleration Shut-Off Valve, Checking

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

Recommended special tools and equipment e.g.:







- V.A.G 1390 hand vacuum pump

Test requirement
- Performance deficiency or tip-in shocks

Test sequence







- Connect hand vacuum pump (V.A.G1390) to vacuum connection for deceleration shut-off valve.
- Operate vacuum pump.

Deceleration shut-off valve must open in direction of (arrow)
- Operate ventilation valve at vacuum pump.

Deceleration shut-off valve must close

If deceleration shut-off valve does not open or does not close, replace valve.

NOTE: Secure connections of deceleration valve using spring-type clamps.

- Erase DTC memory of Engine Control Module (ECM). Diagnostic mode 4: Reset/erase diagnostic data. Diagnostic Mode 4: Reset/Erase Diagnostic Data
- Generate readiness code. Monitors, Trips, Drive Cycles and Readiness Codes