INSPECTION PROCEDURE A-3: The Tailgate does not Open.


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












OPERATION




  • Vehicle speed signal (ABS-ECU <Vehicles without ASC> or ASC-ECU <Vehicles with ASC>)
  • Tailgate lock release handle
  • Tailgate lock actuator
  • Tailgate lock key cylinder switch <Vehicles without keyless entry system>

COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Vehicle speed signal (ABS-ECU <Vehicles without ASC> or ASC-ECU <Vehicles with ASC>) error
  • Malfunction of the tailgate lock release handle
  • Malfunction of the tailgate lock actuator
  • Malfunction of the tailgate lock key cylinder switch <Vehicles without keyless entry system>
  • Malfunction of ETACS-ECU
  • Damaged wiring harness and connectors

DIAGNOSTIC PROCEDURE


STEP 1. Checking central door unlocking operation



Q. Is the check result normal?





STEP 2. Check the M.U.T.-III Diagnosis code of other systems



Q. Is the diagnosis code set?





STEP 3. M.U.T.-III data list




  • Tailgate lock release handle: from OFF to ON
Item No.
 Item name
 Normal condition
230
 Trunk/gate opener switch
 from OFF to ON
OK: Normal condition is displayed.

Q. Is the check result normal?





STEP 4. Connector check: C-311 ETACS-ECU connector, F-13 Tailgate lock actuator connector


Q. Is the check result normal?





STEP 5. Tailgate lock actuator check



Q. Is the check result normal?





STEP 6. Resistance measurement at F-13 tailgate lock actuator connector


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the resistance between the F-13 tailgate lock actuator connector terminal No. 2 and the body earth.
OK: Continuity (less than 2Ω)

Q. Is the check result normal?





STEP 7. Check of the wiring harness between the F-13 tailgate lock actuator connector terminal No. 2 and the body earth



  • Check the earth wires for open circuit.

Q. Is the check result normal?





STEP 8. Check of the wiring harness between the C-311 ETACS-ECU connector terminal No. 1 and the F-13 tailgate lock actuator connector terminal No. 1


note Prior to the wiring harness inspection, check the D-12 intermediate connector, and repair if necessary.

  • Check the input/output line for open circuit.

Q. Is the check result normal?







STEP 9. Connector check: C-313 ETACS-ECU connector, F-05 tailgate lock key cylinder switch connector


Q. Is the check result normal?





STEP 10. Tailgate lock key cylinder switch check



Q. Is the check result normal?





STEP 11. Resistance measurement at F-05 tailgate lock key cylinder switch connector


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the resistance between the F-05 tailgate lock key cylinder switch connector terminal No. 2 and the body earth.
OK: Continuity (less than 2Ω)

Q. Is the check result normal?





STEP 12 Check of the wiring harness between the F-05 tailgate lock key cylinder switch connector terminal No. 2 and the body earth



  • Check the earth wires for open circuit.

Q. Is the check result normal?





STEP 13. Check of the wiring harness between the C-313 ETACS-ECU connector terminal No. 9 and the F-05 tailgate lock key cylinder switch connector terminal No. 1, the C-313 ETACS-ECU connector terminal No. 11 and the F-05 tailgate lock key cylinder switch connector terminal No. 3


note Prior to the wiring harness inspection, check the D-13 intermediate connector, and repair if necessary.

  • Check the input/output line for open circuit.

Q. Is the check result normal?





STEP 14. Retest the system.



Q. Is the check result normal?