Audi Workshop Service and Repair Manuals

The CCS has no components of its own (except for the operating switch). All CCS functions are carried out by the Diesel direct injection system.

Test sequence

• ‒ Connect fault reader V.A.G 1551 (V.A.G 1552). Start engine and select "Address word" 01 of engine control unit. When doing this the engine must be running at idling speed.
  (Connecting fault reader and selecting engine control unit
  .)
• ‒ Press keys 0 and 8 for the function "Read measured value block" and confirm entry with Q key.

• ‒ Enter display group number 066
  (with engine running at idling speed).
• ‒ Confirm entry with key Q.

The measured value block which has been selected will appear in the standard format.

Content of displaygroup:

Measured value block 066

Check displays in display zones 2 and 4.

If display zone 2 does not read "1000" (CCS activated):

• ‒ Check control unit identification of engine control unit:
  Connect fault reader V.A.G 1551 (V.A.G 1552). Start engine and select "Address word" 01 of engine control unit.
  (Connecting fault reader and selecting engine control unit
  => Page 01-13.)

• ‒ If the letter "G" does not appear after the component designation, this means the cruise control system first has to be activated => Page 24-153.

Only for vehicles with automatic gearbox:

• ‒ Take vehicle for a test drive and go beyond a speed of 30 km/h once. After completing the test drive, leave the engine running and engage the selector lever in position 2, 3 or D.
• ‒ Apply the handbrake.

Note:

On vehicles with automatic gearbox the power supply for the CCS switch only cuts in when the road speed exceeds 30 km/h and when the selector lever is in position 2, 3 or D. The power supply is then maintained even during idling, as long as one of the drive positions (except 1 or R) is engaged.

If the specifications for display zone 4 are not obtained when switch B is in the "ON/EIN" position (0011):

Check wiring => Page 24-154.

Activating cruise control system

• ‒ Connect fault reader V.A.G 1551 (V.A.G 1552). Start engine and select "Address word" 01 of engine control unit. When doing this the engine must be running at idling speed.
  (Connecting fault reader and selecting engine control unit
  => Page 01-13.)

• ‒ Press key 1 twice for the function "Log-in procedure" and confirm entry with Q key.

• ‒ Enter code number 11463 and confirm entry with Q key.
• ‒ Press the ⇒key.
• ‒ Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.
• ‒ Switch off ignition.

Checking wiring

• ‒ Connect test box V.A.G 1598/31 to wiring harness for engine control unit and to engine control unit
  => Page 24-8.
• ‒ Check wiring for short to earth, short to positive and open circuit.
• ‒ Rectify any open/short circuit as necessary.

=> Current flow diagrams, Electrical fault finding and Fitting locations

Renew cruise control switch if no fault is found in the wiring.