Inspection Procedure 3: The FCM is cancelled in conjunction with a warning message while the FCM is activated.


caution
  • The system may not also work correctly under certain external factors (such as weather, road conditions, or ambient environments). Prior to the diagnosis, grasp the details if necessary.
  • Whenever the ECU is replaced, ensure that the CAN bus lines are normal.

COMMENTS ON TROUBLE SYMPTOM


Any of the followings are suspected: bad weather (heavy rain, snow, icing), unfavourable road condition, ambient environment, or vehicle condition (heavy load, wheel alignment, tyre punctuation), blocked FCM/LDW/AHB-ECU sensor or its surroundings (cracks, contamination, icing, fog on the windshield or the sensor), a faulty FCM/LDW/AHB-ECU.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE.


STEP 1. Check the FCM/LDW/AHB-ECU mounted surface on the windshield.


Visually check the FCM/LDW/AHB-ECU mounted surface on the windshield for scratch, cracks, contamination or drain drops.

Q. Is the check result normal?

Go to Step 2.

Windshield glass replacement (Refer to GROUP 42A - windshield glass removal and installation).

STEP 2. Retest the system.


(1)Drive the vehicle for approx. ten minutes.
(2)
caution After the road test, do not turn off the ignition switch. If yes, a diagnosis code may be erased.
Check if diagnosis code is set.

Q. Is the diagnosis code set?

Troubleshoot the relevant diagnosis code (Refer to ).

This symptom is caused by a bad weather or environments. It is not a malfunction.