Deceleration shut-off valve, checking

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Special tools, testers and auxiliary items required

Fig 1: Hand Vacuum Pump V.A.G 1390

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Hand vacuum pump V.A.G 1390

Test conditions

Performance deficiency or load change shocks

Test sequence

NOTE:

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

Fig 2: Hand Vacuum Pump V.A.G 1390 Connect To Vacuum Connection Of Deceleration Shut-Off Valve In Proper Direction

Courtesy of VOLKSWAGEN UNITED STATES, INC.

Connect Hand vacuum pump V.A.G 1390 to vacuum connection of deceleration shut-off valve.
Operate Hand vacuum pump V.A.G 1390. Deceleration shut-off valve must open in direction of - arrow -.
Operate ventilation valve at Hand vacuum pump V.A.G 1390. Deceleration shut-off valve must close

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

NOTE:

Connections of deceleration shut-off valve are to be fastened with screw-type clamps.