Checking clutch pedal switch F36 — VW

Checking
clutch pedal switch
F36
The
clutch pedal switch
F36
informs the control unit whether the clutch is engaged or disengaged. This prevents the engine from jolting when disengaging and engaging the clutch and also prevents it from racing when disengaging the clutch when the cruise control system is switched on.
Special tools and workshop equipment required
Fault reader
V.A.G 1551
or
vehicle system tester
V.A.G 1552
with diagnosis cable
V.A.G 1551/1
or
V.A.G 1551/3
Test box
V.A.G 1598/31
Hand-held multimeter
V.A.G 1526C
Auxiliary measuring set
V.A.G 1594C
Current flow diagram
Test procedure
Connect
fault reader
V.A.G 1551
and select engine electronics control unit with
“address word 01”
. The ignition must be switched on for this purpose.
Indicated on display:
Rapid data transfer HELP
Select function XX
Press keys
0
and
8
for 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
,
0
and
6
for
“Display group number 6”
and confirm entry with
Q
key.
Observe display in display zone 2.
Specification: 0 0 0
Read measured value block 6 ->
0 km/h 0 0 0 000000 255
Operate clutch pedal. The left position must change to 1.
Specification: 1 0 0
Read measured value block 6 ->
0 km/h 1 0 0 000000 255
If the specifications are not attained:
Press
→
key.
Press keys
0
and
6
for function
“End data transfer”
and confirm entry with
Q
key.
Switch off ignition.
Pull connector from
clutch pedal switch
F36
⇒ Overview of fitting locations, Page
Chapter
.
Measure resistance at contacts of
clutch pedal switch
F36
. Specification: Clutch not depressed: Max. 10 Ω, clutch depressed: ∞ Ω
If the specifications are not attained:
Renew
clutch pedal switch
F36
.
If specification is attained:
Connect the multimeter to measure voltage between contact 1 and earth. Specification: at least 11.5 V
If the specification is not attained:
Check the line between 2-pin connector contact 1 and central electrics using current flow diagram.
Current flow diagrams, Electrical fault finding and Fitting locations
If the specifications are attained:
Connect
test box
V.A.G 1598/31
to control unit wiring harness.
Note
If necessary, left headlight may have to be released and placed to side to connect
test box
V.A.G 1598/31
Electrical system; Rep. Gr. 94; Lights, bulbs, switches - exterior
.
Check line between
test box
V.A.G 1598/31
and connector for open circuit using current flow diagram. Contact 2+socket 66 Line resistance: Max. 1.5 Ω
Additionally check lines for short circuit to one another.
Additionally check lines for short circuit to battery positive or earth.
If no fault in lines is detected:
Renew
diesel direct injection system control unit
J248
Chapter
.