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.

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

Fig 1: Connecting Hand Vacuum Pump (VAG1390) To Vacuum Connection For Deceleration Shut-Off Valve

Courtesy of VOLKSWAGEN OF AMERICA, INC.

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

Deceleration shut-off valve must close

If deceleration shut -off valve does not open or does not close, replace valve, see COMPONENTS OF CHARGE AIR COOLER, REMOVING AND INSTALLING .

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