Clutch Switch: Testing and Inspection

Signal From Clutch Pedal Position Switch, Checking

Special tools and equipment
- Scan tool VAG 1551 or vehicle system tester VAG 1552 with cable VAG 1551/3
- Test box VAG 1598/31
- Hand multimeter VAG 1526 or multimeter VAG1715
- Adapter set VAG 1594
- Wiring diagram

Test sequence
- Connect the scan tool VAG 1551 (VAG 1552). Then switch ignition on and select engine control module with the "Address word" 01.

(Connecting scan tool and selecting engine control module). Refer to "VAG 1551 Scan Tool" [1][2][3][4][5]Connecting VAG 1551 Scan Tool

Indicated on display:


Rapid data transfer HELP
Select function XX


- Press keys 0 and 8 for the function "Read measured value block" and confirm entry with Q key.

Indicated on display:


Read measured value block HELP
Input display group number XXX


- Press keys 0, 6 and 6 for "display group 66" and confirm with Q key.

Indicated on display:


Read measured value block 66 ->
1 2 3 4


- Observe values displayed in display zone 2 (2nd digit from left).
Specification: x 0 x x
- Depress clutch pedal fully and observe values in display zone 2.
Specification: x 1 x x
- Press -> key.
- Press keys 0 and 6 for the "End output" function and confirm input with Q key.
- Switch off ignition.

If the specification is not obtained:
- Remove shelf on driver's side:
- Pull connector off clutch pedal switch.







- Connect multimeter to measure resistance between contacts 1 and 2.
Specification: approx. 0 ohms
- Depress clutch pedal.
Specification: Infinity ohms (no continuity)

If the specification is not attained:
- Replace clutch pedal switch.

If the specification is obtained:







- Connect multimeter using aux. cables from VAG 1594 to measure voltage between contact 1 and Ground. Then switch ignition on.
Specification: At least 11.5 V

If the specification is not attained:
- Check wiring between 2-pin connector contact 1 and fuse holder using wiring diagram.

If the specification is obtained:







- Connect test box VAG 1598/31 to control module wiring harness. The engine control module remains disconnected.
- Check wiring between test box and 2-pin connector for open circuit using wiring diagram.
Contact 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 or Ground.