Rectify Any Open/Short Circuit As Necessary; Control Unit Itself; Wiring Harness, Socket; Resistance In Wiring: Max. 1.5 Ω - Audi A8 1994 Service Manual

Motronic injection and ignition system (6-cylinder) - Edition 02.1999
Note
- Allow clutch pedal to return slowly to its normal position.
- Readout should return from 1 to 0.
If one or both of the displays does not change from 0 to 1:
- Test voltage supply => Page
Testing voltage supply
- Remove storage compartment on driver's side.
=> General body repairs, Interior; Repair group 68; Storage compartments, covers and trim parts; Removing
and installing driver's storage compartment Storage compartments, covers and trim parts Removing and in‐
stalling driver's storage compartment
- Unplug 2-pin connector from clutch pedal.
- Switch on ignition.
- Connect hand-held multimeter (voltage range) between the following sockets on the connector:
2-pin connector on

wiring harness, socket

1 + earth
If specification is obtained:
- Test wiring connections => Page
If specification is not obtained:
- Test wiring from socket 1 of connector for open circuit and short to earth:
=> Current flow diagrams, Electrical fault-finding and Fitting locations
Testing wiring connection
- Connect test box V.A.G 1598/31 to wiring harness for engine control unit. Do not connect to the engine

control unit itself.

=> Page 30 .
Test the following wiring connections for open circuits and short to positive or earth.
2-pin connector on
wiring harness, socket
2
Resistance in wiring: max. 1.5 ω
=> Current flow diagrams, Electrical fault finding and fitting locations binder
-

Rectify any open/short circuit as necessary.

If no open circuits are found in wiring:

- Renew clutch pedal switch.
Readout must change from 0 to
1
87 .
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Specification
Battery voltage
87 .
Test box V.A.G 1598/31, sock‐
et
39
Display zones
7.3 - Testing clutch pedal switch -F36
Audi A8 1994 ➤
87