Function
Function
This vehicle has what in On Board Diagnostic (OBD) is referred to as a comfort system (this is not a central locking system). Instead of central locking, it has power windows with door locking units.
The new generation of central locking operates using electric motors, compared to the previous systems pneumatic operation.
The lock units located in the doors (door locks) have an electric motor.
After receiving a lock command (either from a door lock or remote), the vehicle is locked and the alarm is armed. The sunroof and any open windows will be closed. Lock status is reported to the control module via the locking unit contact switches.
All the known comfort functions can be performed with the electric comfort system, including interior lights control, Anti-Theft Alarm (ATA) with interior monitoring (being prepared), electric windows, mirror and the radio remote control.
If the airbag control module is activated, a signal is sent automatically to the central control module for comfort system -J393- instructing it to unlock the doors.
The central control module for comfort system -J393- is located under the dash panel and is secured by a bracket to the steering column. It is equipped with DTC memory. The Data Link Connector (DLC) is located in the center console.
The control module recognizes malfunctions in the central locking comfort system (comfort system includes central locking, anti-theft alarm, electric windows, radio frequency remote control, mirror) and stores them in permanent (non-volatile) memory.
To begin troubleshooting, initiate On Board Diagnostic (OBD) and retrieve the stored information with the VAG 1551 scan tool.
VAG 1552 mobile scan tool may also be used.
The malfunction information displayed is used to refer to a DTC table with notes on the possible causes of malfunctions and specific corrective actions.
Malfunctions which can be attributed to a temporary open circuit in the wiring or a loose connection will also be stored. These malfunctions will be displayed as sporadic DTCs ("/SP").
Determining the items which have possibly triggered the anti-theft alarm system
The breakdown of the display content for display group number 15 gives information as to which component triggered the alarm system last, and can therefore aid in the troubleshooting and repair process. Displaying and Reading Trouble Codes
This "DTC memory" cannot be erased.
Only static DTCs are considered:
- Central locking inoperative
- Mirror positioning motor inoperative
- Electric window positioning motor inoperative
- CAN-bus communication inoperative
NOTE: Before changing a component, erase DTC memory, perform functional checks, and check DTC memory again.
System active indicator
The optical central locking system active indicator is an additional LED in the upper part of the driver's door inner trim. The LED flashes for a period of time and then goes out.
The anti-theft alarm system (ATA) is not always displayed.
On Board Diagnostic (OBD) functions
01 - Check Control Module Versions
02 - Check DTC Memory
03 - Output Diagnostic Test Mode
05 - Erase DTC Memory
06 - End Output
07 - Code Control Module
08 - Read Measuring Value Block
10 - Adaptation