Door Switches In Central Locking System

Fault symptom
Central locking system not working.
Not possible to disarm the alarm with the lock, front doors.

Action
1 Check the function of the central locking system
Connect the scan tool.
Select "READ VALUES"
Select "LOOK SIGNAL" or "UNLOCK SIGNAL".
Lock or unlock the central locking system using the door lock.
The scan tool should display "NOT ACTIVE" in the normal key position and "ACTIVE" when the key is turned.
If the scan tool has the correct display for locked or unlocked central locking system, proceed to point 2.
If not, continue fault diagnosis in Electrical system, "Central locking system".

2 Check the programming
Select "PROGRAMMING".
Select "LOCK DEACTIVATION".
Check what is programmed in the control module.
See command menu "PROGRAMMING" ISAT Command Tool Functions
If "OFF" is programmed, change "OFF" to "ON"
If "ON" is programmed, proceed to point 3.

3 Check if the central locking system is working
Select "READ VALUES".
Select "UNLOCK SIGNAL".
The ISAT scan tool should display "INACTIVE" in the key's normal position and "ACTIVE" when the key is turned.
If the scan tool shows the correct value, proceed to point 5.
If the scan tool shows an incorrect value, proceed to point 4.







4 Check the cable assembly Conduct a continuity test on the cable assembly between:
- The control module, pin 17 and the central locking system, pin 5
- The control module, pin 6 and the central locking system, pin 6
The resistance should be < 1 Ohm.
If the resistance is incorrect, take action on the cable assembly.
If the resistance is correct, proceed to point 5.

5 Final test
Check to see if the fault symptom remains. If the problem remains, proceed to Before Control Module Replacement.