Scan Tool Testing and Procedures

Function:
Cruise control functions are controlled by the Engine Control Module (ECM). There is no separate control module for the cruise control.

In addition to the standard equipment, vehicles with cruise control have a cruise control switch (E45) and the button for cruise control (set) (E227), located in either the turn signal switch stalk or multifunction steering wheel.

In case of cruise control function complaints, the On Board Diagnostic (OBD) of the Engine Control Module (ECM) system must be checked for Diagnostic Trouble Codes (DTC) first.

Required for troubleshooting:
- VAG 1551 Scan Tool (ST) with cable VAG 1551/3
- Multimeter Fluke 83
- Test Box VW1598/18
- Connector Test Kit VW1594
- Valid wiring diagram


CAUTION! DO NOT damage, enlarge or bend connector terminals or cavities by forcing probes into them when performing electrical checks. Always use connector test kit VW 1594 to make the necessary electrical connections.


Activating or deactivating cruise control

Test conditions:
- Diagnostic Trouble Code (DTC) memory checked and OK.

Encoding Engine Control Module (ECM)
- Connect Scan Tool (ST) and select Engine Control Module
(address word 01).
- After Engine Control Module (ECM) identification on display
confirm entry with -> button.

Indicated on display:


Rapid data transfer HELP
Select function XX


- Enter 11 for "Log in procedure" function and confirm entry with Q button.

Indicated on display:


Rapid data transfer Q
11 - Login-procedure


- Confirm entry with Q button.

Indicated on display;


Login-procedure
Enter code number XXXXX


- The cruise control is activated/deactivated by entering code numbers according the following table:







- Confirm entry with Q button.

Indicated on display:


Rapid data transfer HELP
Select function XX


- Enter -0- and -6- to select "End Output" function 06.

Indicated on display:


Rapid data transfer Q
06 - End Output


- Confirm entry with Q button

Indicated on display:


Rapid data transfer HELP
Insert addresser word XX


- The scan tool is now in basic setting.
- Switch off ignition and disconnect Scan Tool (ST) from Data Link Connector (DLC).

After encoding the Engine Control Module (ECM), conduct a test drive to check the operation of the cruise control.