Clutch Vacuum Vent Valve Switch -F36-, Checking

Clutch Vacuum Vent Valve Switch -F36-, Checking







Special tools and workshop equipment required
- V.A.G 1526 A Multimeter
- V.A.G 1527 B LED voltage tester
- V.A.G 1594 A Connector test kit
- V.A.G 1598/31 Test box
- VAS 5051 Vehicle diagnostic, testing and information system
- VAS 5051/1 Adapter

NOTE: 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 VAS 5051 scan tool and select vehicle system "01 -Engine electronics" in selection.

When doing this the ignition must be switched on.







Display on VAS 5051 scan tool:
- 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 <- 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 Ohm
- Operate clutch pedal.
- Specified value: Infinity ohm (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 V.A.G 1527 B as follows:

Connector terminal Measure to
3 Vehicle body ground (GND) point

- 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 V.A.G 1598/31 to wiring harness for Engine Control Module (ECM); do not connect directly to ECM.







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

Connector terminal Test box V.A.G 1598/31 Socket
2 39

- Repair any open/short circuit as necessary.