Clutch Vacuum Vent Valve Switch, Checking

Clutch Vacuum Vent Valve Switch, Checking

Special tools, testers and auxiliary items required

• Multimeter (V.A.G 1526 A)

• LED voltage tester (VAG1527B)

• Connector test kit (V.A.G 1594 A)

• Test box (VAG1598/31)

• Vehicle diagnostic, testing and information system ( VAS 5051)

• Adapter (VAS 5051/1)

• This signal helps prevent excessive RPM oscillations and tip-in shocks when clutch is disengaged and is required for the cruise control system.

Work sequence

- Connect scan tool (VAS 5051) and select vehicle system "01 -Engine electronics" in selection. Refer to => [ VAS5051, Connecting and Selecting Functions ] VAS 5051, Connecting and Selecting Functions

When doing this the ignition must be switched on.

Display on scan tool (VAS 5051) :





- Under - 1 - select diagnostic function "08 - Read measured value block".

Display on (VAS 5051):





1. Enter display group

- Enter "066" for "display group number 066" in field - 2 - and confirm entry by pressing Q button.

Display on (VAS 5051):





- Check indication in display field - 2 -.





- Exit function "08 - Read measured value block" by pressing arrow button.

If indications do not resemble description:

Checking switch

- Remove driver's storage compartment.

- Disconnect connector from Clutch Vacuum Vent Valve Switch (F36).





- Connect multimeter between terminals 2 and 3 to measure resistance.





• Specified value: Approx. 0 ohms

- Operate clutch pedal.

• Specified value: infinite ohms (no continuity)

If specified value is not obtained:

- Replace Clutch Vacuum Vent Valve Switch (F36).

If specified value is obtained:

Checking voltage supply

- Connect voltage tester (VAG1527B) as follows:









- Switch ignition on.

• LED must light up.

If LED does not light up:

- Check wiring for open circuit and service if necessary.

If LED lights up:

Checking activation

- Connect test box (VAG1598/31) to wiring harness for ECM; do not connect directly to ECM. Refer to => [ Electrical Testing, with Test Box VAG 1598/31 ] Electrical Testing, With Test Box VAG 1598/31.

- Check for open circuit and short to positive (B+) or Ground (GND) in following wiring connection:









- Repair any open/short circuit as necessary.