Clutch pedal switch -F36 — AUDI

Special tools and workshop equipment required

V.A.G 1526 A
V.A.G 1527 B
V.A.G 1594 A
V.A.G 1598/31
VAS 5051 with VAS 5051/1

or

V.A.G 1551 with V.A.G 1551/3 A

Note:

This signal is designed to prevent speed overshoots and jerkiness on switching from throttle open to throttle closed and vice versa when disengaging clutch. It is needed for the cruise control system.

Test sequence

Connect vehicle diagnostic, testing and information system VAS 5051 or fault reader V.A.G 1551 and select engine electronics control unit with Address word" 01 => Page
01-3
For this purpose, the ignition must be switched on.

Rapid data transfer
HELP
Select function XX
Indicated on display

Enter "08" to select the function "Reading measured value block" and confirm entry with Q-key.

Reading measured value block
Q
Enter display group number XXX
Indicated on display

Enter "066" for "display group number 066" and confirm entry with Q-key.

Read measured value block 66
⇒
1
2
3
4
Indicated on display:

Check clutch pedal switch in display zone 2.

Display zones
1 · 2 · 3 · 4
Display group 066: Signals to engine control unit
Display · xxx km/h · XXXX · xxx km/h · XXXX
Display · ACTUAL speed · Switch settings · SPECIFIED speed · Switch settings
Range · / · X0XX / X1XX
Specified value · X0XX / (clutch pedal / not pressed)
X1XX / (clutch pedal / pressed)
Note · Value: / X = no significance

If the display is not as described:

Checking switch

Remove driver's storage compartment.

=> General Body Assembly, Interior; Repair group 68; Storage compartments/covers; Removing and installing driver's storage compartment
General Body Assembly, Interior
Storage compartments/covers
Removing and installing driver's storage compartment

Unplug the connector from clutch pedal switch.
Connect multimeter between contacts 1 and 2 to measure resistance.
Specified value: approx. 0 ω

Press clutch pedal.
Specified value: ∞ ω(no continuity)

If specified value is not attained:

Checking setting of switch or
Replace clutch pedal switch.

If specified value is attained:

Check the power supply.

Checking power supply

Connect voltage tester V.A.G 1527 B as follows:

Connector / Contact · Measure to
1 · Body earth

Switch the ignition on.
The LED should illuminate.

If the LED does not illuminate:

Check the wiring between contact 1 of connector and fuse for open circuit/short to earth.

=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder

If the LED illuminates:

Check actuation.

Checking actuation

Connect test box V.A.G 1598/31 to wiring harness for engine control unit; do not connect the engine control unit => Page
24-25
.

Check for open circuit and short to positive or earth in the following wiring connection:

Connector / Contact · Test box V.A.G 1598/31 / Socket
2 · 39

Rectify any open/short circuit as necessary.