Scan Tool Testing and Procedures

The CCS has, apart from control switches, no components of its own. All functions are provided by Diesel direct fuel injection system.

Special tools and equipment
- Scan Tool (ST) V.A.G 1551/1552 with cable VAG 1551/3
- Test box VAG 1598/22 (through my 1999)
- Test box VAG 1598/31 (from my 2000)
- Multimeter VAG 1526/ VAG 1715
- Adapter kit VAG 1594
- Wiring diagram

Check conditions







- Fuses No.5, 29 and 32 OK.
- Battery 11.5 volts minimum.

Test sequence
- Connect V.A.G 1551/1552 Scan Tool, refer to "On Board Diagnostic II/VAG 1551/VAS 5051 Scan Tool, Connecting" under "Fuel Delivery and Air Induction/Testing and Inspection" Testing and Inspection
- Start engine and let idle.
- Press -0- and -1- buttons to select address word 01:" Engine electronics".
- Press -> button.

Indicated on display:


Rapid data transfer HELP
Select function XX


- Press buttons -0- and -8- for "Read measured value block" and confirm with -Q- button.

Indicated on display:


Read measured value block HELP
Input display group number XXX


- Press buttons -0-, -0- and -6- for "Display group number -6-" and confirm with -Q- button.
- Observe display in display field 4.


Read measured value block 6 ->
0 km/h 0 0 0 000000 0


Specification: 0

If 255 is displayed in display field 4:


Read measured value block 6 ->
0 km/h 0 0 0 000000 255


Vehicles with automatic transmission only:

Test drive and exceed a speed of 30 km/h (approx. 19 mph) once. Then switch off engine and leave selector lever in position 2, 3 or D.

Observe safety procedures during test drive, refer to "Fuel Delivery and Air Induction; Service Precautions". Service Precautions

- Set parking brake.


NOTE: On vehicles with an automatic transmission CCS switch will not be supplied with voltage until vehicle speed exceeds 30 km/h (20 mp/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 provided a forward gear is selected.







- Check CCS switch specification in display field 3.

Check prerequisites Display field 3
Switch B at "OFF" 000000
Switch B at "ON" 000011
Switch B at "RES" 001011
Switch A pressed 000111
Brake pedal depressed 010011
Clutch pedal depressed 100011

- Press -> button.
- Press buttons -0- and -6- for "End output" and confirm with -Q- button.
- Switch off ignition.

If specifications are not obtained:
- Remove wiper arms and cowl panel:







- Connect test box VAG 1598/22 (through my 1999) or VAG 1598/31 (from my 2000) to Engine Control Module (ECM) -J248- 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, refer to "Diagnostic Trouble Code (DTC) Memory, Checking and Erasing" Testing and Inspection
- Display readiness code. If DTC memory has been erased or Engine Control Module (ECM) was disconnected reset readiness code.