Scan Tool Testing and Procedures

Cruise Control System (CCS), Checking

Special tools and equipment
- V.A.G 1551 scan tool or 1552 scan tool with cable VAG 1551/3
- Test box VAG 1598/31
- Hand multimeter VAG 1526 or multimeter VAG 1715
- Adapter set VAG 1594
- Wiring diagram

Check conditions







- All fuses must be OK.
- The battery voltage must be at least 11.5 V.

Test sequence
- Connect the V.A.G 1551 scan tool ((VAG 1552). Then switch ignition on and select engine control module with the "Address word" 01.
(Connecting scan tool and selecting engine control module.). Refer to "Scan Tool Testing/Test Requirements and Work Procedures/VAG 1551 Scan Tool" under "Powertrain Management", Testing and Inspection

Indicated on display:


Rapid data transfer HELP
Select function XX


- Press keys 0 and 8 for the function "Read measuring value block" and confirm entry with Q key.

Indicated on display:


Read measuring value block
Input display group number XXX


- Press keys 0, 6 and 6 for "display group 66" and confirm with Q key.

Indicated on display: (1 to 4 = Display zones)


Read measuring value block 66 ->
1 2 3 4







- Check the specification for the switch position from CCS operating switch in display zone 4.

Check prerequisites Display zone 3

Switch B in detent at 0001
"OFF"

Switch B not in detent 0000
at "OFF"

Switch B at "ON" 0011

Switch B at "RES" 1011

Switch A pressed 0111
(Switch B at "ON")

If the specifications are not obtained:
- Press the -> key.
- Press keys 0 and 6 for the "End output" function and confirm input with the Q key.
- Switch off ignition.

If the specifications are not obtained:
- Press -> key.
- Press keys 0 and 6 for the function "End output" and confirm entry with the Q key.
- Switch off ignition.







- Connect test box VAG 1598/31 to control module wiring harness. The engine control module remains disconnected.
- Check wiring from engine control module to CCS operating switch for open/short circuits:
- Check DTC memory, if necessary, repair any faults and then erase DTC memory, checking and erasing DTC memory. Refer to "Displaying, Reading and Erasing Trouble Codes/With Manufacturers Scan Tool/Clearing Trouble Codes" under "Powertrain Management" Testing and Inspection