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- -> Connect test box V.A.G 1598/31 to wiring harness connector. Connect earth clip on test box (cannot be
seen in Fig.) to battery negative. Whether or not the engine control unit is additionally to be connected to
the test box is indicated in the appropriate test sequences.
- Perform testing as described in appropriate repair operations.
- Unplug connector at CCS switch.
=> General Body Repairs, Interior; Repair Group 70; Dash Panel Dash Panel
Check for short to positive/negative and open circuit in the wiring.
- Check wiring according to the current flow diagram.
=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder
If the test is not OK, the wiring must be checked.
- If necessary, eliminate open circuit in wiring/short.
If the wiring is OK, the CCS switch must be replaced.
3.6 - Activating/deactivating cruise control system
Requirements:
• Vehicle diagnostic, testing and information system VAS 5051 connected up and vehicle self-diagnosis se‐
lected => Page 162
• Ignition on
Sequence of operations
-> Readout on VAS 5051:
- From list -1- select vehicle system "01 - Engine electronics".
- Wait until next readout appears.
Audi A8 1994 ➤
Electrical system Self-diagnosis 02.99 ➤ - Edition 05.2002
116 01 - Self-diagnosis
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