Nissan Sentra B18 (2020-2025) Service Manual: Frequently Cannot Detect the Vehicle Ahead / Detection Zone Is Short

Nissan Sentra B18 (2020-2025) Service Manual / Cruise Control & Driver Assistance / Cruise Control System :: Icc / Symptom Diagnosis / Frequently Cannot Detect the Vehicle Ahead / Detection Zone Is Short

Diagnosis Procedure

Diagnosis Procedure

The detection function may become unstable in the following cases.

When radar reflections from the Nissan Sentra vehicle ahead is interrupted.
When driving a road with extremely sharp corners.
When the sensor cannot detect a Nissan Sentra vehicle ahead while the vehicle ahead passes a hill or valley.

VISUAL CHECK (1)

Check the contamination and foreign matter on the distance sensor area of the front bumper.

Do foreign matter adhere?
YES >>
GO TO 3.
NO >>
GO TO 2.
VISUAL CHECK (2)
1. Remove the front bumper. Refer to Removal and Installation.
2. Check distance sensor for contamination and foreign matter.
Do foreign matter adhere?
YES >>
GO TO 3.
NO >>
GO TO 4.
WIPE OUT DIRT AND FOREIGN MATERIALS

Wipe out the contamination and foreign matter in the area around the distance sensor.

>>
GO TO 8.
VISUAL CHECK (3)

Check distance sensor for cracks and scratches.

Are there any cracks or scratches?
YES >>
GO TO 6.
NO >>
GO TO 5.
PERFORM RADAR ALIGNMENT
1. Install the front bumper. Refer to Removal and Installation.
2. Perform the radar alignment. Refer to Work Procedure.
3. Perform ICC system action test. Refer to Work Procedure.
4. Check that the Nissan Sentra vehicle ahead detection performance improves.
Does it improve?
YES >>
INSPECTION END
NO >>
GO TO 6.
REPLACE DISTANCE SENSOR
1. Replace the distance sensor. Refer to Removal and Installation.
2. Install the front bumper. Refer to Removal and Installation.
3. Perform the radar alignment. Refer to Work Procedure.
4. Perform ICC system action test. Refer to Work Procedure.
5. Check that the Nissan Sentra vehicle ahead detection performance improves.
Does it improve?
YES >>
INSPECTION END
NO >>
GO TO 7.
REPLACE ADAS CONTROL UNIT 2

Replace ADAS control unit 2. Refer to Removal and Installation.

>>
GO TO 8.
CHECK ICC SYSTEM
1. Erase the self-diagnosis results, and then perform “All DTC Reading” again after performing the action test. (Refer to Work Procedure for action test.)
2. Check that the ICC system is normal.
>>
INSPECTION END

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