volkswagen Workshop Repair Guides

Volkswagen Workshop Service and Repair Manuals

Deceleration Shut-Off Valve, Checking|Page 5389 > < Deceleration Shut-Off Valve, Checking
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VAG1390 hand vacuum pump

Test requirement

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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.

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Connect hand vacuum pump (VAG1390) to vacuum connection for deceleration shut-off valve.

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Operate vacuum pump.
Deceleration shut-off valve must open in direction of arrow

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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 screw-type clamps.

Deceleration Shut-Off Valve, Checking|Page 5389 > < Deceleration Shut-Off Valve, Checking