Microswitch In Tailgate, Key Opening

Fault symptom
The alarm cannot be disarmed by using the car key in the tailgate.







Diagnostic procedure
1 Check the tailgate opening function, opening with key
Insert the key in the tailgate lock and turn it through 45 degrees.

The tailgate motor should be activated when the key is turned through 45 degrees.
Is the motor activated?
[YES] Continue with point 2.
[NO] Check fuse 17. If the fuse is OK, continue with point 3.

2 Check the programming
- Connect an Intelligent Saab Tester (ISAT) scan tool.
- Select "PROGRAMMING".
- Select "DISENGAGE BOOT".
- Check the programming of the control module. See the "PROGRAMMING" command menu. ISAT Scan Tool Menu Structure

The programming should be "ON".
Is the programming OK?
[YES] Continue with point 7.
[NO] Change "OFF" to "ON".







3 Check the operation of the tailgate
- Connect an ISAT scan tool.
- Select "READ VALUES".
- Select "TAILGATE LOCK".
- Lock and unlock the tailgate with the key.

The ISAT scan tool display should show "OPEN" and "CLOSED" as appropriate.
Does it display the correct text?
[YES] Continue with point 4.
[NO] Continue with point 7.

4 Check the microswitch, tailgate release
- Unplug connector H6-8 (in tailgate)
- Select "READ VALUES".
- Select "TAILGATE LOCK".

The ISAT scan tool should display "OPEN".
Does it display the correct text?
[YES] Change the microswitch.
[NO] Continue with point 5.







5 Check the microswitch's power supply (+30 circuit)
Connect the test lamp to pin 2 of connector H6-8 and a good grounding point.

Does the test lamp light up?
[YES] Continue with point 6.
[NO] Continue fault diagnosis as described in "Body and Frame/Power Locks. "Central locking system". Testing and Inspection

6 Check the wiring
Check the continuity of the wiring between pin 4 of the connector and pin 15 of the alarm's control module.

The resistance should be < 1 ohm.
Is the resistance OK?
[YES] Continue with point 7.
[NO] Repair or replace the wiring harness.

7 Final test
Check to see if the fault symptom persists.

Does the trouble persist?
[YES] Continue as described in "Before Changing the Electronic Control Module". Before Changing the Electronic Control Module
[NO] The remedial measure taken was correct or the fault is of intermittent nature.