Nissan Sentra B18 (2020-2025) Service Manual: Diagnosis and Repair Work Flow

Work Flow

OVERALL SEQUENCE

DETAILED FLOW

1. INTERVIEW FOR MALFUNCTION

   It is also important to clarify the customer concerns before starting the inspection. Interview the customer about the concerns carefully and understand the symptoms fully.

   Note:

   The customers are not professionals. Never assume that “maybe the customer means···” or “maybe the customer mentioned this symptom”.

   >>

   GO TO 2.

2. SELF-DIAGNOSIS WITH CONSULT

   1. Perform “All DTC Reading” with CONSULT.

   2. Check if any DTC is detected in self-diagnosis results of “LASER/RADAR”, “LANE CAMERA” and “ICC/ADAS 2”.

   Is any DTC detected?

   YES >>

   Record or print self-diagnosis results and freeze frame data (FFD). GO TO 5.

   NO >>

   GO TO 3.

3. ACTION TEST

   Perform the ICC system action test to check the operation status. Refer to Work Procedure.

   Check if any other malfunctions occur.

   >>

   GO TO 4.

4. SYMPTOM DIAGNOSIS

   Perform the applicable diagnosis according to the diagnosis chart by symptom. Refer to Symptom Table.

   >>

   GO TO 6.

5. TROUBLE DIAGNOSIS BY DTC

   1. Erase self-diagnostic results.
   2. Ignition switch OFF → ON.

   CAUTION:

   Be sure to wait of 10 seconds after turning ignition switch OFF or ON.

   1. Check the DTC in the self-diagnosis results.

   2. Perform trouble diagnosis for the detected.

      • LASER/RADAR: Refer to DTC Index.

      • LANE CAMERA: Refer to DTC Index.

      • ICC/ADAS 2: Refer to DTC Index.

   Note:

   If “DTC: U1000” is detected, first diagnose the CAN communication system or ITS communication system.

   >>

   GO TO 6.

6. MALFUNCTIONING PART REPAIR

   Repair or replace the identified malfunctioning parts.

   >>

   GO TO 7.

7. REPAIR CHECK (SELF-DIAGNOSIS WITH CONSULT)

   1. Erases self-diagnosis results.

   2. Perform “All DTC Reading” again after repairing or replacing the malfunctioning parts.

   3. Check if any DTC is detected in self-diagnosis results of “LASER/RADAR”, “LANE CAMERA” and “ICC/ADAS 2”.

      • LASER/RADAR: Refer to DTC Index.

      • LANE CAMERA: Refer to DTC Index.

      • ICC/ADAS 2: Refer to DTC Index.

   Is any DTC detected?

   YES >>

   GO TO 5.

   NO >>

   GO TO 8.

8. REPAIR CHECK (ACTION TEST)

   Perform the ICC system action test. Check if the malfunction symptom is solved or no other symptoms occur.

   Is there any malfunction symptom?

   YES >>

   GO TO 4.

   NO >>

   INSPECTION END

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