With Manufacturer's Scan Tool

Clutch Pedal Switch (Clutch Vacuum Vent Valve Switch -F36-) Signal, Checking

Special tools and equipment
- VAG1551 Scan Tool (ST) or VAG1552 mobile scan tool with VAG1551/3 adapter cable
- VAG1598/31 test box
- Multimeter (Fluke 83 or equivalent)
- VW1594 adapter set
- Wiring diagram

Check conditions







- Fuses 5, 10 and 29 OK
- Battery voltage at least 11.5 V

Test sequence
- Connect VAG1551 (VAG1552) Scan Tool (ST).
- Switch ignition on and press buttons -0- and -1- to insert "Engine Electronics" address word 01.

Indicated on display


Rapid data transfer HELP
Select function XX


- Press buttons -0- and -8- to select "Read Measuring Value Block" function 08 and press -Q- button to confirm input.

Indicated on display


Read Measuring Value Block
Input display group number XXX


- Press buttons -0-, -6- and -6- to input display group number 66 (066) and press -Q- button to confirm input.

Indicated on display: (1-4 = display fields)


Read Measuring Value Block 06 ->
1 2 3 4


- Observe display in display field 2 (2nd digit from left).
Specified value: x 0 x x
- Depress clutch pedal fully and observe display in display field 2. Specified value: x 1 x x
- Press -> button.
- Press buttons -0- and -6- to select "End Output" function 06 and press -Q- button to confirm input.
- Switch ignition off.

If the display does not change:
- Disconnect 2-pin harness connector from clutch vacuum vent valve switch -F36-.







- Measure resistance between switch terminals -1- and -2-.
- Specified value without clutch depressed: max. 1.5 ohms
- Specified value with clutch depressed: max. infinity ohms

If the specified values are not obtained:
- Replace clutch vacuum vent valve switch -F36-.


NOTE: Observe installation position of clutch pedal switch in bearing bracket upper assembly hole.


- Check DTC memory. If necessary, repair any malfunctions and erase DTC memory.
- Display readiness code.

If DTC memory has been erased of the Engine Control Module (ECM) was disconnected from permanent battery (B+) voltage, the readiness code must be generated again.

If the specified values are obtained:







- Connect multimeter to measure voltage between terminal -1- and Ground (GND).
- Switch ignition on.
Specified value: min. 11.5 V

If the specified value is not obtained:
- Check wiring for open circuit between 2- pin harness connector terminal -1- and central electrics using wiring diagram.

If the specified values are obtained:
- Remove wiper arms and plenum chamber cover.







- Connect VAG1598/31 test box to Engine Control Module (ECM) wiring harness. Engine Control Module (ECM) is not connected by this action.







- Check wiring for open circuit between test box and 2-pin harness connector using wiring diagram.
Terminal -2- + socket 39
- Wire resistance: Max. 1.5 ohms
- Additionally, check wires for short to one another.
- Additionally, check wiring for short to battery positive (B+) or Ground (GND).