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Nissan Sentra B18 (2020-2025) Service Manual: Heated Steering Wheel System

Component Function Check

Component Function Check

  1. CHECK HEATED STEERING WHEEL SYSTEM

    1. Check operate heated steering wheel system. Refer to System Description.

    Is the inspection result normal?

    YES >>

    Inspection End.

    NO >>

    Go to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK FUSES

    1. Check that the following fuses are not blown:

      Signal name

      Fuse No.

      Capacity

      Ignition power supply

      6

      10 A

      44

      10 A

    Is the fuse blown?

    YES >>

    Replace the blown fuse after repairing the affected circuit.

    NO >>

    GO TO 2.

  2. CHECK HEATED STEERING WHEEL RELAY POWER SUPPLY

      1. Ignition switch OFF.

      2. Disconnect heated steering wheel relay harness connector.

      3. Ignition switch ON.

      4. Check voltage between heated steering wheel relay harness connector and ground.

        (+)

        (-)

        Voltage

        (Approx.)

        Heated steering wheel relay

        Connector

        Terminal

        M75

        1

        Ground

        Battery voltage

        3

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    Repair or replace harness or connector.

  3. CHECK HEATED STEERING WHEEL RELAY

    1. Check heated steering wheel relay. Refer to Component Inspection.

    Is the inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    Replace heated steering wheel relay. Refer to Component Parts Location.

  4. CHECK HARNESS BETWEEN HEATED STEERING WHEEL RELAY AND A/C AUTO AMP.

      1. Ignition switch OFF.

      2. Disconnect the heated steering wheel relay harness connector and A/C auto amp. harness connector.

      3. Check continuity between heated steering wheel relay harness connector and A/C auto amp. harness connector.

        Heated steering wheel relay

        A/C auto amp.

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        M75

        2

        M34

        56

        Yes

      4. Check continuity between heated steering wheel relay harness connector and ground.

        Heated steering wheel relay

        —

        Continuity

        Connector

        Terminal

        M75

        2

        Ground

        No

    Is the inspection result normal?

    YES >>

    GO TO 5.

    NO >>

    Repair or replace harness or connector.

  5. CHECK HARNESS BETWEEN HEATED STEERING WHEEL RELAY AND COMBINATION SWITCH (SPIRAL CABLE)

      1. Disconnect the combination switch (spiral cable) harness connector.

      2. Check continuity between heated steering wheel relay harness connector and combination switch (spiral cable) harness connector.

        Heated steering wheel relay

        Combination switch (spiral cable)

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        M75

        5

        M49

        41

        Yes

      3. Check continuity between heated steering wheel relay harness connector and ground.

        Heated steering wheel relay

        —

        Continuity

        Connector

        Terminal

        M75

        5

        Ground

        No

    Is the inspection result normal?

    YES >>

    GO TO 6.

    NO >>

    Repair or replace harness or connector.

  6. CHECK GROUND CIRCUIT

    1. Check continuity between combination switch (spiral cable) harness connector and ground.

      Combination switch (spiral cable)

      —

      Continuity

      Connector

      Terminal

      M49

      42

      Ground

      Yes

    Is the inspection result normal?

    YES >>

    GO TO 7.

    NO >>

    Repair or replace damaged parts.

  7. CHECK HEATED STEERING WHEEL

    1. Check heated steering wheel. Refer to Component Inspection.

    Is the inspection result normal?

    YES >>

    GO TO 8.

    NO >>

    Replace heated steering wheel. Refer to Removal and Installation.

  8. CHECK HARNESS BETWEEN HEATED STEERING WHEEL AND COMBINATION SWITCH (SPIRAL CABLE)

      1. Disconnect the heated steering wheel harness connector.

      2. Check continuity between heated steering wheel harness connector and combination switch (spiral cable) harness connector.

        Heated steering wheel

        Combination switch (spiral cable)

        Continuity

        Connector

        Terminal

        Connector

        Terminal

        M99

        43

        M49

        41

        Yes

        44

        42

      3. Check continuity between heated steering wheel harness connector and ground.

        Heated steering wheel

        —

        Continuity

        Connector

        Terminal

        M99

        43

        Ground

        No

        44

    Is the inspection result normal?

    YES >>

    Check the intermittent incident. Refer to Intermittent Incident.

    NO >>

    Repair or replace damaged parts.

Component Inspection

Component Inspection

  1. CHECK HEATED STEERING WHEEL CONTINUITY

    1. Check continuity between heated steering wheel connector terminals.

      Heated steering wheel

      Condition

      Continuity

      Terminals

      43 − 44

      Leather surface temperature of 68°F (20°C) or less

      Yes

      Leather surface temperature of 86°F (30°C) or more

      No

    Is the inspection result normal?

    YES >>

    GO TO 2.

    NO >>

    Replace heated steering wheel. Refer to Removal and Installation.

  2. CHECK HEATED STEERING WHEEL RESISTANCE

    1. Check resistance between heated steering wheel connector terminals.

      Heated steering wheel

      Condition

      Resistance

      (Approx.)

      Terminals

      43 − 44

      Leather surface temperature of 68°F (20°C)

      1.7 – 2.17 Ω

    Is the inspection result normal?

    YES >>

    Inspection End.

    NO >>

    Replace heated steering wheel. Refer to Removal and Installation.

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