Diagnosis Procedure

The warning chime may not sound in some cases when there is a short distance between vehicles. Some examples are:

• When the vehicles are traveling at the same speed and the distance between vehicles is not changing.
• When the vehicle ahead is traveling faster and the distance between vehicles is increasing.
• When a vehicle cuts in near own vehicle.
• The warning chime will not sound when own vehicle approaches vehicles that are parked or moving slowly.
• The warning chime does not sound when the system does not detect any vehicle ahead. (Diagnose the conditions under which the system is detecting the vehicle ahead and when the system is malfunctioning. If there is any malfunction in detecting the vehicle ahead, check the system following the Diagnosis Procedure .)

1. PERFORM ACTIVE TEST 

   CONSULT

   1. Select "METER BUZZER" in "Active Test" mode of "ICC/ADAS".
   2. Check that the function operates normally.

   Is the inspection result normal?

   YES

   Inspection End.

   NO

   GO TO 2

2. PERFORM THE SELF DIAGNOSTIC RESULT 

   CONSULT

   1. Perform "All DTC Reading" mode.
   2. Check if the "U1000" is detected in "Self Diagnostic Result" mode of "ICC/ADAS".

   Is "U1000" detected?

   YES

   GO TO 3

   NO

   GO TO 4

3. CAN COMMUNICATION INSPECTION 

   Check the CAN communication and repair or replace malfunctioning parts. Refer to DTC Description .

   Inspection End.

4. CHECK METER BUZZER OPERATION 

   Check meter buzzer. Refer to Component Function Check .

   Is the inspection result normal?

   YES

   Replace the ADAS control unit. Refer to Removal and Installation .

   NO

   Replace the combination meter. Refer to Removal and Installation .