If the diagnosis
code No. B2352 is set, diagnose the CAN bus lines.
When replacing the ECU, always check that the communication circuit is normal.
DIAGNOSIS FUNCTION
If an open circuit or short to earth occurs in the immobilizer antenna, KOS-ECU sets the
diagnosis code No. B2352.
JUDGEMENT CRITERIA
When the ignition switch is turned ON, KOS-ECU sends signals to the receiver antenna module.
The receiver antenna transmits random numbers to the emergency key when it receives signals
from KOS-ECU. If an open circuit or short to earth occurs on the wiring harness between KOS-ECU
and receiver antenna at this time, KOS-ECU determines that there is a problem.
PROBABLE CAUSES
Malfunction of the receiver antenna module
Damaged wiring harness and connectors
Malfunction of KOS-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnostics
Use M.U.T.-III to diagnose the CAN bus lines.
Q.
Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C -
Troubleshooting ).
On completion, go to Step 2.
STEP 3. Check the wiring harness between the C-34 receiver antenna
module connector terminal No. 8, 12 and the C-104 KOS-ECU connector terminal No. 32, 7.
Check the power supply and earth wires for open circuit.
Q.
Is the check result normal?
Go to Step 4.
Repair the wiring harness.
STEP 4. Replace the receiver antenna module, and 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?
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 ).
)
)
)
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C -
Troubleshooting 
).
On completion, go to Step 2.