Code No.B240D Front antenna(indoor) open



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


DIAGNOSTIC FUNCTION


If an open circuit is detected in the inside transmission antenna (front), the diagnosis code is set.

JUDGMENT CRITERIA


While the engine switch is turned to the OFF position, the system has detected an open circuit in the antenna.

PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. Check of short to power supply, short to earth, and open circuit in INFP, INFG line between the inside transmission antenna assembly (front) connector and the KOS-ECU connector.


Q. Is the check result normal?

Go to Step 2

Repair the connectors or wiring harness.

STEP 2. Keyless operation system communication test


Check that the communication with the inside transmission antenna assembly (front) is normal (Refer to Antenna Test ).
Antennas to be checked
OK: Normal is displayed.

Q. Is the check result normal?

Go to Step 3

Replace the inside transmission antenna assembly (front).

STEP 3. Check whether the diagnosis code is reset.


(1)Erase the diagnosis code.
(2)Turn the power supply mode of the engine switch from OFF to ON.
(3)Check if the diagnosis code is set.
(4)Turn the power supply mode of the engine switch from OFF to ON.

Q. Is the diagnosis code set?

Replace KOS-ECU and register the ID codes (Refer to ).

Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Deal with Intermittent Malfunction ).