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.
- 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).

Test sequence

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

- Connect VAS 5051 scan tool and select vehicle system "01 - Engine electronics" in selection. Connecting VAS 5051 Scan Tool

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-.

Display Group 066:

- 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. Wiring and Component Testing Using VAG1598/31 Test Box
- Connect multimeter as follows to measure voltage:

Test box VAG Measure to
1598/31
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 VAG Steering Column Electronic
1598/31 Systems Control Module -J527-
Socket terminal

38 -

- 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-.