With Manufacturer's Scan Tool
Cruise control system (CCS), checking
Special tools and equipment
- V.A.G1551 Scan Tool (ST) or VAG1552 mobile scan tool with VAG1551/3 adapter cable
- VAG1598/22 test box
- Multimeter (Fluke 83 or equivalent)
- VW1594 adapter set
- Wiring diagram
Test requirements
- Fuses 5, 10 and 29 OK
- Battery (B+) voltage at least 11.5 V
Test sequence
- Connect V.A.G1551 (VAG1552) Scan Tool (ST). [1][2]Reading and Clearing Diagnostic Trouble Codes
- Turn on ignition and press buttons -0- and -1- to insert "Engine Electronics" address word 01.
Indicated on display
Rapid data transfer HELP
Select function XX
- Press buttons -0- and -8- to select "Read Measuring Value Block" function 08 and press -Q- button to confirm input.
Indicated on display
Read Measuring Value Block
Input display group number XXX
- Press buttons -0-, -6- and -6- to input display group number 66 (066) and press -Q- button to confirm input.
Indicated on display: (1-4 = display fields)
Read Measuring 66 ->
1 2 3 4
If 255 is displayed in display field 4:
- Activate cruise control system Cruise Control System, Activating and Deactivating
Vehicles with automatic transmission only:
- Perform test drive and exceed speed of 30 km/h (approx. 19 mph) once. Then turn off engine and leave selector lever in position 2, 3 or D.
Observe the safety measures during a test drive. Refer under "Powertrain Management/Fuel Delivery and Air Induction/Service Precautions", Technician Safety Information
- Engage parking brake.
NOTE: On vehicles with an automatic transmission, the CCS switch will not be supplied with voltage until the vehicle speed exceeds 30 km/h and the selector lever is in position 2, 3 or D. Once the switch has been supplied with voltage it will also remain live at idle speed provided a driving range (except 1 or R) is selected.
- Check specified value for switch position from CCS operating switch in display field 4.
Check requirements Display fields
Switch -B- in detent at "OFF" 0011
Switch -B- at "ON" 0000
Switch -B- at "RES" 1000
Switch A pressed 0100
If the specified values are not obtained:
- Press -> button.
- Press buttons -0- and -6- to select "End Output" function 06 and press -Q- button to confirm input.
- Turn off ignition.
- Remove wiper arms and plenum chamber cover.
- Connect VAG1598/22 test box to control module wiring harness.
- Check wiring from Engine Control Module (ECM) to CCS operating switch for open/short circuits.
- Check DTC memory. If necessary, repair any malfunctions and erase DTC memory.
Reading Diagnostic Trouble Codes
Clearing Diagnostic Trouble Codes
- Display readiness code. Monitors, Trips, Drive Cycles and Readiness Codes
If DTC memory has been erased or the Engine Control Module (ECM) was disconnected from permanent battery (B+) voltage, generate the readiness code again. Monitors, Trips, Drive Cycles and Readiness Codes