Remote control, tailgate release
Symptom: Tailgate cannot be disarmed/opened.
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Remote control, tailgate release
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Fault symptom
Tailgate cannot be disarmed/opened.
Diagnostic procedure
1 Check the operation of the tailgate release
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Connect the ISAT scan tool.
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Select "TAILGATE LOCK".
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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.
Is the function correct?
Continue with point 7.
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
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Unplug connector H26-4 (RHD).
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Unplug connector H26-1 (LHD).
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Connect the test lamp to pin 22 of connector H26-4 (H26-1) and a good grounding point.
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Press the right-hand button on the remote control.
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Is the test lamp on?
Continue fault diagnosis as described in Service Manual 3:2 "Central locking system, electrically operated tailgate release".
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 correct?
Continue with point 7.
Repair or replace the wiring harness.
4 Check the operation of the tailgate release
The tailgate motor should be activated.
Does the tailgate unlock?
Continue with point 6.
Continue with point 5.
5 Check the operation of the tailgate release
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Unplug connector H26-4.
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Connect the test lamp to connector H26-4, pin 22, and a good grounding point.
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The test lamp should light.
Is the test lamp on?
Try changing the remote control.
Continue with point 7.
6 Check the remote control
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Press the right-hand button on the remote control.
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The ISAT scan tool should display "RH BUTTON" when this button is pressed.
Is ISAT displaying the correct text?
Continue with point 7.
Try changing the remote control.
7 Final check
Check to see if the fault symptom remains.
Is the problem still present?
See "Before replacing a control module".
The remedial measures taken were correct or the fault is of intermittent nature.
