Clutch Switch: Testing and Inspection

Clutch Vacuum Vent Valve Switch -F36- Checking







Special tools and equipment
- VAG1526A
- VAG1527B
- VAG1594A
- VAG1598/31
- VAS5051 with VAG5051/1
- or
- VAG1551 with VAG1551/3A


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 control module for engine electronics using "address word" 01. Ignition must remain switched on. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks" Testing and Inspection

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
Enter 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.
- 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:
- Replace Clutch Pedal Position (CPP) switch.

If specified value is obtained:
- Check voltage supply

Checking voltage supply







- Connect VAG1527B voltage tester as follows:

Harness connector Measure to Terminal
1 Chassis Ground (GND)

- 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:
- Repair open circuit if necessary.

If LED lights up:
- Checking activation.

Checking activation
- Connect VAG1598/31 test box at wiring harness to Engine Control Module (ECM) do not connect ECM. Refer to "Scan Tool Testing/Wiring and Component Testing Using VAG1598/31 Test Box", Testing and Inspection






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

Harness connector VAG1598/31 test box
Terminal Socket
2 39

- Repair open circuit or short circuit if necessary.