Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

Symptom check: In the following conditions, the warning chime may not sound even if the vehicle distance is short:

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 the accelerator pedal is depressed, overriding the system.
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. Refer to Diagnosis Procedure .)

PERFORM ACTIVE TEST
CONSULT

Check if the warning chime sounds on the active test item "ICC BUZZER" of "LASER/RADAR".

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 detecting condition when the malfunction occurred. If the warning chime should have sounded, replace the distance sensor (ICC sensor). Refer to Removal and Installation .

GO TO 8
PERFORM ACTIVE TEST
CONSULT

Check if the warning chime sounds on the active test item "METER BUZZER" of "ICC/ADAS".

Does the warning chime sound?

YES

GO TO 9

NO

GO TO 5
CHECK ICC WARNING CHIME CIRCUIT
Check the meter buzzer circuit. Refer to Component Function Check .

Is the inspection result normal?

YES

GO TO 8

NO

GO TO 7
PERFORM THE SELF DIAGNOSTIC RESULT
CONSULT
1. Select "Self Diagnostic Result"mode of "ICC/ADAS".
2. Check if DTC "U1000" is detected in "Self Diagnostic Result" mode of "ICC/ADAS".
Is "U1000" detected?

YES

GO TO 6

NO

GO TO 4
CAN COMMUNICATION SYSTEM INSPECTION
Check the CAN communication system and repair or replace malfunctioning parts. Refer to DTC Logic .

Inspection End.
REPAIR OR REPLACE MALFUNCTIONING PARTS
Repair or replace malfunctioning parts.

GO TO 10
REPLACE ADAS CONTROL UNIT
Replace the ADAS control unit. Refer to Removal and Installation .

GO TO 8
PERFORM DISTANCE SENSOR (ICC SENSOR) ALIGNMENT
CONSULT
1. Perform distance sensor (ICC sensor) alignment. Refer to Description .
2. Perform action test. Refer to Description .
3. Check that the vehicle ahead detection performance improves.
GO TO 10
CHECK ICC SYSTEM
CONSULT
1. Erase the "Self Diagnostic Result", and then select "Self Diagnostic Result" mode again after performing the action test. (Refer to Description for action test.)
2. Check that the ICC system is normal.
Inspection End.