Nissan Murano: Seat :: Dtc/circuit Diagnosis / Seat Back Heater Sensor

Nissan Murano (Z52) 2015-2024 Service Manual / Body Interior / Seat :: Dtc/circuit Diagnosis / Seat Back Heater Sensor

Component Function Check

CHECK SEAT BACK HEATER FUNCTION

Check whether or not the temperature of the seat back heater changes in accordance with the HEAT switch operation of the climate controlled seat control switch.

Is the inspection result normal?

YES>>

Inspection End.

NO>>

Refer to Diagnosis Procedure.

Diagnosis Procedure

CHECK SEAT BACK HEATER SENSOR SIGNAL

  1. Ignition switch ON.

  2. Check voltage between seat back heater harness connector and ground.

    (+) (-) Condition

    Voltage

    (Approx.)
    Seat back heater
    Connector Terminal
    LH B213 3 Ground Climate controlled seat operated 1 V - 5 V
    RH B309

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

GO TO 2.

CHECK SEAT BACK HEATER SENSOR CIRCUIT

  1. Ignition switch OFF.

  2. Disconnect climate controlled seat control unit connector and seat back heater connector.

  3. Check continuity between climate controlled seat control unit harness connector and seat back heater harness connector.

    Climate controlled seat control unit Seat back heater Continuity
    Connector Terminal Connector Terminal
    LH B203 3 B213 3 Yes
    RH B320 B309

  4. Check continuity between climate controlled seat control unit harness connector and ground.

    Climate controlled seat control unit — Continuity
    Connector Terminal
    LH B203 3 Ground No
    RH B320

Is the inspection result normal?

YES>>

Replace climate controlled seat control unit. Refer to Climate Controlled Seat Control Unit.

NO>>

Repair or replace harness.

CHECK SEAT BACK HEATER SENSOR GROUND CIRCUIT

  1. Ignition switch OFF.

  2. Disconnect climate controlled seat control unit connector and seat back heater connector.

  3. Check continuity between climate controlled seat control unit harness connector and seat back heater harness connector.

    Climate controlled seat control unit Seat back heater Continuity
    Connector Terminal Connector Terminal
    LH B203 18 B213 4 Yes
    RH B320 B309

  4. Check continuity between climate controlled seat control unit harness connector and ground.

    Climate controlled seat control unit — Continuity
    Connector Terminal
    LH B203 18 Ground No
    RH B320

Is the inspection result normal?

YES>>

Replace seat back heater. Refer to Exploded View.

NO>>

Repair or replace harness.

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