Clutch Vacuum Vent Valve Switch -F36-

Clutch Vacuum Vent Valve Switch -F36-, Checking

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. Connecting VAG 1551 Scan Tool
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. [1][2]Scan Tool Connecting and Initial Checks

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

- Repair open circuit or short circuit if necessary.