Symptom 5 Chime Does Not Sound

TROUBLE DIAGNOSIS FOR SYMPTOMS


Symptom 5 Chime Does Not Sound

The chime may not sound occasionally in the following cases even if the distance from the vehicle ahead is short:
- When the speed difference from that of the vehicle ahead is small (both vehicles driving at similar speed).
- When the vehicle ahead drives at faster speed (the actual distance is increasing).
- When depressing the accelerator pedal.
- Chime does not sound when the vehicle ahead is not driving.
- 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 Symptom 7 ICC System Frequently Can Not Detect the Vehicle Ahead/ Detection Zone Is Short).
1.CHECK ICC WARNING CHIME
With CONSULT-III
With "ICC" "Active Test", check if "ICC BUZZER" operates normally.
OK or NG
OK - 1. Determine preceding vehicle detection status when malfunction occurred. If chime should have sounded: after replacing ICC sensor integrated unit and adjust laser beam aiming.
2. Erase DTC and perform ICC system running test, and then perform self-diagnosis of ICC system again.
NG - GO TO 2.
2.PERFORM ICC SENSOR INTEGRATED UNIT SELF-DIAGNOSIS
With CONSULT-III
1. Perform self-diagnosis.
2. Check if "U1000: CAN COMM CIRCUIT" is indicated.
Is it indicated?
YES - CAN communication inspection. ICC.
NO - GO TO 3.
3.CHECK UNIFIED METER AND A/C AMP.
With CONSULT-III
Perform "METER/M&A" self-diagnosis. .
Is malfunction indicated?
YES - 1. Repair or replace applicable item.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NO - GO TO 4.
4.CHECK CHIME OPERATION
With CONSULT-III
1. Select "BUZZER" on "BCM".
2. With "BUZZER" "Active Test", check if "IGN KEY WARN ALM" and "LIGHT WARN ALM" operate normally.
Does chime sound?
YES - 1. Replace ICC sensor integrated unit, and adjust laser beam aiming.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.
NO - 1. Replace combination meter.
2. Erase DTC and perform ICC system running test. Then perform self-diagnosis of ICC system again.