WIS Document: 4036

| | Remote control, tailgate release Fault symptom Tailgate cannot be disarmed/opened. Diagnostic procedure 1 Check the operation of the tailgate release | - | Connect the ISAT scan tool. | - | Select "READ VALUES". | - | Select "TAILGATE LOCK". 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? | yes Continue with 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. Is the test lamp on? | 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 correct? | yes Continue with 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. Does the tailgate unlock? | yes Continue with 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. Is the test lamp on? | yes Try changing the remote control. | no Continue with point 7. 6 Check the remote control | - | Select "READ VALUES". | - | Select "CONTROL". | - | Press the right-hand button on the remote control. The ISAT scan tool should display "RH BUTTON" when this button is pressed. Is ISAT displaying the correct text? | yes Continue with point 7. | no Try changing the remote control. 7 Final check Check to see if the fault symptom remains. Is the problem still present? | yes See "Before replacing a control module". | no The remedial measures taken were correct or the fault is of intermittent nature.