Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

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 .)

PERFORM ACTIVE TEST
Check if the warning chime sounds on the active test item "ICC BUZZER" of "ICC/ADAS" with CONSULT.

Does the warning chime sound?

YES

GO TO 2.

NO

GO TO 3.
CHECK THE MALFUNCTION SYMPTOM DURING WARNING CHIME OPERATION
Understand the vehicle ahead detection condition when the malfunction occurred. If the warning chime should have sounded, replace the ADAS control unit. Refer to Removal and Installation .

GO TO 9.
PERFORM THE SELF-DIAGNOSIS
1. Perform "All DTC Reading" with CONSULT.
2. Check if the "U1000" is detected in self-diagnosis results of "ICC/ADAS".
Is "U1000" detected?

YES

GO TO 4.

NO

GO TO 5.
CAN COMMUNICATIONS INSPECTION
Check the CAN communication and repair or replace malfunctioning parts. Refer to DTC Logic .

GO TO 9.
PERFORM THE SELF-DIAGNOSIS OF ADAS CONTROL UNIT 2
1. Perform "All DTC Reading" with CONSULT.
2. Check if any DTC is detected in self-diagnosis results of "ICC/ADAS 2".
Is any DTC detected?

YES

Repair or replace malfunctioning parts. Refer to DTC Index .

NO

GO TO 6.
CHECK WARNING BUZZER CIRCUIT
Check warning buzzer. Refer to Component Function Check .

Is the inspection result normal?

YES

GO TO 8.

NO

GO TO 7.
REPAIR OR REPLACE MALFUNCTIONING PARTS
Repair or replace malfunctioning parts.

GO TO 9.
REPLACE ADAS CONTROL UNIT
Replace the ADAS control unit. Refer to Removal and Installation .

GO TO 9.
Check each system
1. Erase "self-diagnosis result", and then perform "All DTC Reading" again after performing the action test. (Refer to Description for action test.)
2. Check if the each system is normal.
INSPECTION END