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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 162 (Seat (Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> Climate Controlled Seat Blower Motor >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Titan XD and 2018 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR POWER SUPPLY 
    1. Turn ignition switch ON.
    2. Check voltage between climate controlled seat blower motor LH harness connector B219 and climate controlled seat blower motor RH harness connector B307 and ground.

      (+)

      (-)

      Condition

      Voltage

      (Approx.)

      Climate controlled seat blower motor

      Connector

      Terminal

      LH

      B219

      2

      Ground

      Climate controlled seat switch

      HEAT mode

      Battery voltage

      COOL mode

      Other than above

      0V

      RH

      B307

      Climate controlled seat switch

      HEAT mode

      Battery voltage

      COOL mode

      Other than above

      0V

    Is the inspection result normal?

    YES

    GO TO 3 .

    NO

    GO TO 2 .

  2. CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect climate controlled seat blower motor LH harness connector B219 and climate controlled seat blower motor RH harness connector B307 and climate controlled seat control unit LH connector B229 and climate controlled seat control unit RH connector B304.
    3. Check continuity between climate controlled seat blower motor LH harness connector B219 and climate controlled seat blower motor RH harness connector B307 and climate controlled seat control unit LH connector B229 and climate controlled seat control unit RH connector B304.

      Climate controlled seat blower motor

      Climate controlled seat control unit

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      LH

      B219

      2

      B229

      12

      Yes

      RH

      B307

      B304
    4. Check continuity between climate controlled seat blower motor LH harness connector B219 and climate controlled seat blower motor RH harness connector B307 and ground.

      Climate controlled seat blower motor

      (-)

      Continuity

      Connector

      Terminal

      LH

      B219

      2

      Ground

      No

      RH

      B307

    Is the inspection result normal?

    YES

    Replace climate controlled seat control unit. Refer to Removal and Installation .

    NO

    Repair or replace harness.

  3. CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR SPEED CONTROL SIGNAL 

    Check voltage between climate controlled seat blower motor LH harness connector B219 and climate controlled seat blower motor RH harness connector B307 and ground.

    (+)

    (-)

    Condition

    Voltage

    (Approx.)

    Climate controlled seat blower motor

    Connector

    Terminal

    LH

    B219

    3

    Ground

    Climate controlled seat switch

    HEAT

    5.5V - 8V

    COOL

    HI

    11.2V

    MID

    8V

    LO

    6.5V

    Other than above

    0V

    RH

    B307

    Climate controlled seat switch

    HEAT

    5.5V - 8V

    COOL

    HI

    11.2V

    MID

    8V

    LO

    6.5V

    Other than above

    0V

    Is the inspection result normal?

    YES

    GO TO 5 .

    NO

    GO TO 4 .

  4. CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR SPEED CONTROL SIGNAL CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect climate controlled seat blower motor LH harness connector B219 and climate controlled seat blower motor RH harness connector B307 and climate controlled seat control unit LH connector B229 and climate controlled seat control unit RH connector B304.
    3. Check continuity between climate controlled seat blower motor LH harness connector B219 and climate controlled seat blower motor RH harness connector B307 and climate controlled seat control unit LH connector B229 and climate controlled seat control unit RH connector B304.

      Climate controlled seat blower motor

      Climate controlled seat control unit

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      LH

      B219

      3

      B229

      4

      Yes

      RH

      B307

      B304
    4. Check continuity between climate controlled seat blower motor LH harness connector B219 and climate controlled seat blower motor RH harness connector B307 and ground.

      Climate controlled seat blower motor

      (-)

      Continuity

      Connector

      Terminal

      LH

      B219

      3

      Ground

      No

      RH

      B307

    Is the inspection result normal?

    YES

    Replace climate controlled seat control unit. Refer to Removal and Installation .

    NO

    Repair or replace harness.

  5. CHECK CLIMATE CONTROLLED SEAT BLOWER MOTOR GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect climate controlled seat blower motor LH harness connector B219 and climate controlled seat blower motor RH harness connector B307 and climate controlled seat control unit LH connector B229 and climate controlled seat control unit RH connector B304.
    3. Check continuity between climate controlled seat blower motor LH harness connector B219 and climate controlled seat blower motor RH harness connector B307 and climate controlled seat control unit LH connector B229 and climate controlled seat control unit RH connector B304.

      Climate controlled seat blower motor

      Climate controlled seat control unit

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      LH

      B219

      4

      B229

      20

      Yes

      RH

      B307

      B304
    4. Check continuity between climate controlled seat blower motor LH harness connector B219 and climate controlled seat blower motor RH harness connector B307 and ground.

      Climate controlled seat blower motor

      (-)

      Continuity

      Connector

      Terminal

      LH

      B219

      4

      Ground

      No

      RH

      B307

    Is the inspection result normal?

    YES

    Replace climate controlled seat blower motor. Refer to Removal and Installation .

    NO

    Repair or replace harness.

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