Microswitch In Tailgate, Opening With Key

Fault diagnosis, microswitch in tailgate, opening with key

Fault symptom
The alarm cannot be disarmed with the key in the tailgate.

Action
1 Check the function of opening the tailgate with the key
Check that the tailgate motor is activated when the key is turned 45 degrees.
If this works correctly, proceed to point 2.
If this does not work correctly, check fuse 17.
If the fuse is intact, proceed to point 3.
2 Check the programming
Connect the ISAT scan tool.
Select "PROGRAMMING"
Select "DISENGAGE BOOT".
Check to see how the control module is programmed. See command menu "PROGRAMMING". ISAT Scan Tool Menu Structure
If the programming is incorrect, change from "OFF" to "ON".
If the programming is correct ("ON"), proceed to point 7.







3 Check the function of the tailgate
Connect the ISAT scan tool.
Select "READ VALUES".
Select "TAILGATE LOCK".
Unlock and lock the tailgate using the key. Check at the same time that the ISAT scan tool display shows "OPEN" or "CLOSED" respectively.
If this works correctly, proceed to point 4.
If not, proceed to point 7.
4 Check the microswitch for unlocking the tailgate
Unplug connector H6-8 (in the tailgate).
Select "READ VALUES".
Select "TAILGATE LOCK".
The ISAT scan tool should show "OPEN".
If the ISAT scan tool shows the correct text, change the microswitch.
If the ISAT scan tool shows incorrect text, proceed to point 5.







5 Check the +30 supply to the microswitch
Connect the test lamp to connector H6-8, pin 2 and a safe grounding point.
If the test lamp lights, proceed to point 6.
If the test lamp does not light. continue fault diagnosis in "Central locking system/Electric tailgate release". Testing and Inspection
6 Check the cable assembly
Conduct a continuity test on the cable assembly between pin 4 in the connector and the alarm control module, pin 15.
The resistance should be <1 Ohm.
If the resistance is incorrect, fix the cable assembly.
If the resistance is correct, proceed to point 7.
7 Final test
Check to see if the fault symptom remains.
If the problem remains, proceed to "Before Changing the Electronic Control Module". Before Changing the Electronic Control Module