DCA

CHIME DOES NOT SOUND


Description

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 ICC (Full Speed Range).)




CHIME DOES NOT SOUND


Diagnosis Procedure

1.PERFORM ACTIVE TEST
Check if the warning chime sounds on the active test item "ICC BUZZER" of "ICC" with CONSULT-III.
Does the warning chime sound?
YES - GO TO 2.
NO - GO TO 3.
2.CHECK THE MALFUNCTION SYMPTOM DURING WARNING CHIME OPERATION
1. Understand the vehicle ahead detection condition when the malfunction occurred. If the warning chime should have sounded, replace the ICC sensor integrated unit. Refer to Exploded View.
2. Adjust the laser beam aiming. Refer to Description.
- GO TO 8.
3.CHECK ICC WARNING CHIME CIRCUIT
Check the ICC warning chime circuit. Refer to DCA.
Is the inspection result normal?
YES - GO TO 4.
NO - GO TO 6.
4.PERFORM THE SELF-DIAGNOSIS
1. Perform "All DTC Reading" with CONSULT-III.
2. Check if the "U1000" is detected in self-diagnosis results of "ICC".
Is "U1000" detected?
YES - GO TO 5.
NO - GO TO 7.
5.CAN COMMUNICATIONS INSPECTION
Check the CAN communication and repair or replace malfunctioning parts. Refer to DCA DCA DCA DCA
- GO TO 8.
6.REPAIR OR REPLACE MALFUNCTIONING PARTS
Repair or replace malfunctioning parts.
- GO TO 8.
7.REPLACE ICC SENSOR INTEGRATED UNIT
1. Replace the ICC sensor integrated unit. Refer to Exploded View.
2. Adjust the laser beam aiming. Refer to Description.
- GO TO 8.
8.CHECK DCA SYSTEM
1. Erase "self-diagnosis result", and then perform "All DTC Reading" again after performing the action test.
(Refer to DCA for action test.)
2. Check if the DCA system is normal.
- INSPECTION END