Clutch Vacuum Vent Valve Switch -F36-

Clutch Vacuum Vent Valve Switch -F36-, Checking


Special Tools And Equipment







- VAG1526A
- VAG1527B
- VAG1594A
- VAG1598/31
- VAS5051 with VAG505/1
- or
- VAG1551 with VAG155/3B


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


Test sequence
- Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG 1551/VAS 5051 Scan Tool" Testing and Inspection
Ignition must remain switched on for this.

When indicated on display:


Rapid data transfer HELP
Select function XX


- Press buttons -0- and -8- to select "Read Measuring Value Block" and press -Q- button to confirm input.

When indicated on display:


Read Measuring Value Block Q
Input display group number XXX


- Press buttons -0-, -6- and -6- to select "display group number 066" and press -Q- button to confirm input.

Indicated on display:


Read Measuring Value Block 66 ->
1 2 3 4


- Check Clutch Pedal Position (CPP) switch in display field 2.

Display group 066:

If indications do not resemble description:

Check switch
- Remove driver-side storage compartment.
- Disconnect harness connector at Clutch Pedal Position (CPP) switch.


NOTE: Connector sockets are marked on the back side of the connector.


- Connect multimeter between terminal 1 and 2 for resistance measurement.
- Specification: approx. 0 Ohms
- Depress clutch pedal.
- Specification: Infinity Ohms (no continuity)

If specified value is not obtained:
- Check adjustment of switch or
- Replace Clutch Pedal Position (CPP) switch.

If specified value is obtained:

Checking voltage supply







- Connect VAG1527B voltage tester as follows:







- Switch ignition on.
- LED must light up.

If LED does not light up:
- Check wire connection from terminal 1 of connector to fuse for open circuit and short circuit to Ground (GND):

If LED lights up:

Checking activation
- Connect VAG1598/31 test box at wiring harness to ECM, do not connect ECM. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG 1598/31 Test Box" Testing and Inspection







- Check the following wire connection for open circuit and short circuit to Ground (GND) and B+:






- Repair oper circuit or short circuit if necessary.