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Nissan Sentra B18 (2020-2025) Service Manual: Diagnosis Procedure

Nissan Sentra B18 (2020-2025) Service Manual / Driver Controls / Defogger :: Dtc/circuit Diagnosis / Rear Window Defogger Switch / Diagnosis Procedure

Diagnosis Procedure

  1. REPLACE A/C SWITCH ASSEMBLY

      1. Ignition switch OFF.

      2. Replace A/C switch assembly (rear window defogger switch). Refer to Removal and Installation (with automatic air conditioner) or Removal and Installation (with manual air conditioner).

      3. Start engine.

      4. Operate rear window defogger switch and check the operating condition.

    Is the inspection result normal?

    YES>>

    Inspection End.

    NO>>

    With automatic A/C: GO TO 2.

    NO>>

    With manual A/C: GO TO 3.

  2. REPLACE A/C AUTO AMP.

      1. Ignition switch OFF.

      2. Replace A/C auto amp. Refer to Removal and Installation.

      3. Start engine.

      4. Operate rear window defogger switch and check the operating condition.

    Is the inspection result normal?

    YES >>

    Inspection End.

    NO >>

    Replace BCM. Refer to Removal and Installation.

  3. REPLACE A/C AMP.

      1. Ignition switch OFF.

      2. Replace A/C amp. Refer to Removal and Installation.

      3. Start engine.

      4. Operate rear window defogger switch and check the operating condition.

    Is the inspection result normal?

    YES >>

    Inspection End.

    NO >>

    Replace BCM. Refer to Removal and Installation.

Component Function Check
Component Function Check CHECK REAR WINDOW DEFOGGER SWITCH FUNCTION Check that the indicator lamp of rear window defogger illuminates when r ...

Rear Window Defogger Relay
...

Other materials:

Confirmation Procedure
Confirmation Procedure DTC CONFIRMATION PROCEDURE CONSULT Ignition switch ON. Ignition switch OFF and wait at least 30 seconds. ...

Preparation
Special Service Tools Special Service Tools The actual shape of the tools may differ from those illustrated here. Tool number (TechMate No.) Tool name   Descript ...

Abbreviations
Abbreviation List The following ABBREVIATIONS are used: A ABBREVIATION DESCRIPTION A/C Air conditioner A/C Air conditioning A/F sensor Air fuel ratio sensor A/T Automatic transaxle/transmission ABS Anti-lock braking sys ...

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