Inspection Procedure B-4: Door-ajar signal is not received.



caution Before replacing the ECU, ensure that the input and output signal circuits are normal.


COMMENTS ON TROUBLE SYMPTOM




PROBABLE CAUSES



  • Damaged tailgate latch
  • Damaged electric tailgate control unit
  • Damaged wiring harness and connectors

DIAGNOSIS PROCEDURE


STEP 1. Door-ajar switch inspection



Q. Is the check result normal?





STEP 2. Resistance measurement at tailgate latch connector (door-ajar switch earth line terminal).


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the resistance between tailgate latch connector (door-ajar switch earth line terminal) and body earth.
OK: Continuity exists (2 Ω or less).

Q. Is the check result normal?





STEP 3. Check of open circuit in earth line between tailgate latch connector (door-ajar switch terminal) and body earth.


Q. Is the check result normal?





STEP 4. Check of open circuit in LTH line between electric tailgate control unit connector and tailgate latch connector.


Q. Is the check result normal?





STEP 5. System retest



Q. Is the check result normal?





STEP 6. After the replacement of tailgate latch, recheck the trouble symptom.


(1)Replace the tailgate latch.
(2)Check that the door-ajar switch signal is received normally.

Q. Is the check result normal?