Code No.B240D Front antenna(indoor) open


caution When replacing the ECU, always check that the communication circuit is normal.










DIAGNOSTIC FUNCTION



JUDGMENT CRITERIA



PROBABLE CAUSES



  • Malfunction of the inside transmission antenna assembly (front)
  • Malfunction of the KOS-ECU
  • Damaged wiring harness and connectors

DIAGNOSIS PROCEDURE


STEP 1. Connector check: C-115 Inside transmission antenna assembly (front) connector, C-23 KOS-ECU connector


Q. Is the check result normal?





STEP 2. Check the wiring harness between the C-115 inside transmission antenna assembly (front) connector terminal No. 1, 2, 3 and the C-23 KOS-ECU connector terminal No. 6, 16, 40.



note Prior to the wiring harness inspection, check C-16 intermediate connector, and repair if necessary.

Q. Is the check result normal?





STEP 3. Keyless operation system communication test



Antennas to be checked
    Front antenna (indoor)
OK: Normal is displayed.

Q. Is the check result normal?





STEP 4. Check whether the diagnosis code is reset.


(1)Erase the diagnosis code.
(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?