Cruise Control System (CCS) Switch -E45-, Testing

Cruise Control System (CCS) Switch -E45-, Testing







Special tools and workshop equipment required
- V.A.G 1526 A Multimeter
- V.A.G 1594 A Connector test kit
- V.A.G 1598/31 Test box
- VAS 5051 Vehicle diagnostic, testing and information system
- VAS 5051/1 Adapter

The cruise control system (CCS) has no components of its own (except for the operating switch -E45-). All cruise control functions are carried out by the Engine Control Module (ECM).

Work sequence

WARNING: To avoid danger of accident when performing measurement and test drives, observe safety precautions.

- Connect VAS 5051 and select vehicle system "01 -Engine electronics" in selection.

When doing this the ignition must be switched on.







Display on VAS 5051:
- Under -1- select diagnostic function "08 - Read measured value block".







Display on VAS 5051:
1 - Enter display group
- Enter "066" for "display group number 066" in field -2- and confirm entry by pressing -Q- button.







Display on VAS 5051:
- Check indication in display field -2-.
- Road test vehicle to check switch positions as shown in display field -4-.







- Exit function "08 - Read measured value block" by pressing <- button.

If "0" appears in display field 2 even with activated CCS:
- Connect V.A.G 1598/31 test box to wiring harness for Engine Control Module (ECM) and also directly to Engine Control Module.

- Connect multimeter as follows to measure voltage:

Test box V.A.G 1598/31 Measure to
Socket
38 Engine ground (GND)

- Switch ignition on.
- Specification for CCS switched off: 0 V
- Specification for CCS switched on: approx. battery voltage (B+)

If the specified value is not obtained:
- Check for open circuit and short to positive (B+) or ground (GND) in following wiring connections:

Test box Steering Column Electronic
V.A.G 1598/31 Socket Systems Control Module
-J527- terminal
38 See Electrical Wiring Diagrams,
Troubleshooting & Component Locations

- Repair any open/short circuit as needed..

Significance of 8-digit display in display field 4







If specifications in display field 4 are not obtained:
- Check CCS switch -E45-.