Remote Control, Tailgate Release

Fault symptom
The tailgate cannot be disarmed or released.







Diagnostic procedure
1 Check the operation of the tailgate release
- Connect an Intelligent Saab Tester (ISAT) scan tool.
- Select "READ VALUES".
- Select "TAILGATE LOOK".
The ISAT scan tool should display "CLOSED". Press the right-hand button on the remote control. The ISAT scan tool should display "OPEN" for about 3 seconds and the tailgate motor should be activated.
Does this happen?
[YES] Proceed to point 7.
[NO] If the ISAT scan tool displays "OPEN" for about 3 seconds but the tailgate motor is not activated, continue with point 2.
If the ISAT scan tool displays "CLOSED", proceed to point 4.

2 Check the unlock signal from the electronic control module
- Unplug connector H26-4 (RHD).
- Unplug connector H26-1 (LHD).
- Connect the test lamp to pin 22 of connector H26-4 (H26-1) and a good grounding point.
- Press the right-hand button on the remote control.
Does the test lamp light up?
[YES] Continue fault diagnosis as described in Service Manual 3:2 "Central locking system, electrically operated tailgate release".
[NO] Continue with point 3.







3 Check the wiring connected to the electronic control module
Check the wiring harness for continuity between pin 23 of the electronic control module and pin 22 of connector H26-4.
The resistance should be < 1 ohm.
Is the resistance OK?
[YES] Proceed to point 7.
[NO] Repair or replace the wiring harness.

4 Check the operation of the tailgate release
- Select "ACTIVATE".
- Select "TAILGATE".
- Select "ON".
The tailgate motor should be activated.
Is the tailgate released?
[YES] Proceed to point 6.
[NO] Continue with point 5.







5 Check the operation of the tailgate release
- Unplug connector H26-4.
- Connect the test lamp to connector H26-4, pin 22, and a good grounding point.
- Select "ACTIVATE".
- Select "TAILGATE".
- Select "ON".
The test lamp should light up.
Does it light up?
[YES] Try changing the remote control.
[NO] Proceed to point 7.

6 Check the remote control
- Select "READ VALUES".
- Select "REMOTE CONTROL".
- Press the right-hand button on the remote control.
The ISAT scan tool should display "RH BUTTON" when this button is pressed.
Does it display the correct text?
[YES] Continue with point 7.
[NO] Try changing the remote control.

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".
[NO] The remedial measures taken were correct or the fault is of intermittent nature.