Whenever the ECU is replaced, ensure that the CAN bus lines are normal.
OPERATION
FCM/LDW/AHB-ECU monitors the malfunction in the ECU.
DTC SET CONDITION
This DTC is set when the abnormality below is detected:
A malfunction is detected inside the FCM/LDW/AHB-ECU (including the sensor).
PROBABLE CAUSES
Malfunction of the FCM/LDW/AHB-ECU
DIAGNOSIS
Check whether the DTC is set again.
Check again if the DTC is set in the FCM/LDW/AHB-ECU.
(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC is set.
Is the DTC set?
Replace the FCM/LDW/AHB-ECU (Refer to ).
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
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Replace the FCM/LDW/AHB-ECU (Refer to 
).
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction