Diagnosis Procedure

The detection function may become unstable in the following cases.

• When distance sensor reflections from the vehicle ahead are interrupted.
• When driving on a road with extremely sharp corners.
• When the sensor cannot detect a vehicle ahead while the vehicle ahead passes a hill or valley.

1. VISUAL CHECK (1) 

   Check the contamination and foreign matter on the distance sensor area.

   Is foreign matter adhered?

   >>

   GO TO 3.

   >>

   GO TO 2.

2. VISUAL CHECK (2) 

   Check distance sensor for contamination and foreign matter.

   Is foreign matter adhered?

   >>

   GO TO 3.

   >>

   GO TO 4.

3. WIPE OUT DIRT AND FOREIGN MATERIALS 

   Wipe out the contamination and foreign matter in the area around the distance sensor.

   >>

   GO TO 8.

4. VISUAL CHECK (3) 

   Check distance sensor for cracks and scratches.

   Are there any cracks or scratches?

   >>

   GO TO 6.

   >>

   GO TO 5.

5. ADJUST DISTANCE SENSOR ALIGNMENT 
   1. Adjust the distance sensor alignment. Refer to Application Notice .
   2. Perform ICC system action test. Refer to Description .
   3. Check that the vehicle ahead detection performance improves.

   Does it improve?

   >>

   Inspection End.

   >>

   GO TO 6.

6. REPLACE DISTANCE SENSOR 
   1. Replace the distance sensor. Refer to Removal and Installation .
   2. Adjust the distance sensor alignment. Refer to Application Notice .
   3. Perform ICC system action test. Refer to Description .
   4. Check that the vehicle ahead detection performance improves.

   Does it improve?

   >>

   Inspection End.

   >>

   GO TO 7.

7. CHECK ICC SYSTEM 
   1. Erase the "Self Diagnostic Result", and then perform "Self Diagnostic Result" again after performing the action test. (Refer to Description for action test.) Description  for action test.)
   2. Check that the ICC system is normal.

   >>

   Inspection End.