Code No.B2412 LF antenna power voltage


caution
  • If the diagnosis code No. B2412 is set, diagnose the CAN bus lines.
  • When replacing the ECU, always check that the communication circuit is normal.


















DIAGNOSTIC FUNCTION



JUDGMENT CRITERIA



PROBABLE CAUSES



  • Damaged wiring harness and connectors
  • Malfunction of the KOS-ECU

DIAGNOSTIC PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnostics



Q. Is the check result normal?





STEP 2. Connector check: C-104 KOS-ECU connector


Q. Is the check result normal?





STEP 3. Check the wiring harness between KOS-ECU and each inside and outside antenna.




  • Wiring harness between C-104 KOS-ECU connector terminal No. 40 and D-119 outside transmitter antenna assembly (driver’s side) connector terminal No. 1
  • Wiring harness between C-104 KOS-ECU connector terminal No. 40 and D-101 outside transmitter antenna assembly (front passenger’s side) connector terminal No. 1
  • Wiring harness between C-104 KOS-ECU connector terminal No. 40 and D-123 inside transmitter antenna (front) connector terminal No. 1
  • Wiring harness between C-104 KOS-ECU connector terminal No. 40 and D-106 inside transmitter antenna (rear: RH) connector terminal No. 1
  • Wiring harness between C-104 KOS-ECU connector terminal No. 40 and F-17 outside transmitter antenna assembly (tailgate) connector terminal No. 3
note Before the wiring harness inspection, inspect C-22 and F-22 <the outside transmitter antenna (tailgate)> intermediate connectors, and repair them if necessary.

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?