Inspection Procedure 13: Lock Switch (tailgate) does not Work.


caution Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.












PROBABLE CAUSES



  • Malfunction of the exterior transmitter antenna assembly (tailgate)
  • Malfunction of the lock switch (tailgate side)
  • Damaged wiring harness and connectors
  • Malfunction of the KOS-ECU

DIAGNOSTIC PROCEDURE


STEP 1. M.U.T.-III diagnosis code



Q. Is the diagnosis code set?





STEP 2. Connector check: C-104 KOS-ECU connector, F-10 Lock switch (tailgate) connector


Q. Is the check result normal?





STEP 3. Check the wiring harness between the C-104 KOS-ECU connector terminal No. 22 and the F-10 lock switch (tailgate) connector terminal No. 1, and between the F-10 lock switch (tailgate) connector terminal No. 2 and the earth.



  • Check the signal and earth wires for open circuit.
note Before the wiring harness inspection, inspect C-36 and D-12 intermediate connectors, and repair them if necessary.

Q. Is the check result normal?





STEP 4. Lock switch (tailgate) check



Q. Is the check result normal?





STEP 5. KOS communication test



Q. Is the check result normal?





STEP 6. Check of the troubles



Q. Is the check result normal?