Cruise Control System (CCS), Testing

Cruise Control System (CCS), Testing







Special tools and equipment
- VAG1526 A
- VAG1594 A
- VAG1598/31
- VAS5051 with VAS5051/1

The Cruise Control System (CCS) has no components of its own (except for the operating switch). All cruise control functions are carried out by the engine control module.

Test sequence

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

- Connect testing and information system VAS5051 and select vehicle system "01 -Engine electronics" in selection. Ignition must be switched on.







Display on VAS5051:
- Under -1- select diagnostic function "08 - Read measured value block".







Display on VAS5051:
1. Enter display group
- Enter "066" for "display group number 066" in zone -2- and confirm entry by pressing -Q- button.







Display on VAS5051:
- Check indication in display field -2-.
- It must be ascertained by a road test whether switch positions are shown in display zone -4-.







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

If "0" appears in display zone 2 even with activated CCS:
- Connect VAG1598/31 test box to wiring harness for engine control module and also to engine control module. Wiring and Component Check With Test Box VAG 1598/31
- Connect multimeter as follows to measure voltage:

Test box VAG1598/31 Measure to
Socket
38 Engine Ground

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

If the specified values are not obtained:
- Check for open circuit and short to positive or Ground in following wiring connections:

Test box Steering column electronics control module -J527-
VAG1598/31 terminal
Socket
38

- Repair any open/short circuit as necessary.







If specifications in display zone 4 are not obtained:
- Check Cruise control switch -E45-.