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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 136 (Power Window Control System (Circuit Diagnosis)) >> Circuit Diagnosis >> Encoder >> Driver Side >> 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 ENCODER SIGNAL 
    1. Turn ignition switch ON.
    2. Check signal between main power window and door lock/unlock switch harness connector and ground with oscilloscope.
      With Crew Cab

      Signal name

      (+)

      (-)

      Signal

      (Reference value)

      Main power window and door lock/unlock switch

      Connector

      Terminal

      Encoder signal 1

      D7

      5

      Ground

      Refer to following signals

      Encoder signal 2

      4
      Except Crew Cab

      Signal name

      (+)

      (-)

      Signal

      (Reference value)

      Main power window and door lock/unlock switch

      Connector

      Terminal

      Encoder signal 1

      D5

      1

      Ground

      Refer to following signals

      Encoder signal 2

      2
      G06934392Courtesy of NISSAN NORTH AMERICA, INC.

    Is the inspection result normal?

    YES

    Replace main power window and door lock/unlock switch. Refer to Removal and Installation .

    NO

    GO TO 2 .

  2. CHECK ENCODER SIGNAL CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect main power window and door lock/unlock switch connector and front power window motor LH connector.
    3. Check continuity between main power window and door lock/unlock switch harness connector and front power window motor LH harness connector.
      With Crew Cab

      Main power window and door lock/unlock switch

      Front power window motor LH

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      D7

      4

      D9

      5

      Yes

      5

      6
      Except Crew Cab

      Main power window and door lock/unlock switch

      Front power window motor LH

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      D5

      2

      D9

      5

      Yes

      1

      6
    4. Check continuity between main power window and door lock/unlock switch harness connector and ground.
      With Crew Cab

      Main power window and door lock/unlock switch

      Ground

      Continuity

      Connector

      Terminal

      D7

      4

      No

      5
      Except Crew Cab

      Main power window and door lock/unlock switch

      Ground

      Continuity

      Connector

      Terminal

      D5

      1

      No

      2

    Is the inspection result normal?

    YES

    GO TO 3 .

    NO

    Repair or replace harness.

  3. CHECK ENCODER POWER SUPPLY 
    1. Connect main power window and door lock/unlock switch connector.
    2. Turn ignition switch ON.
    3. Check voltage between front power window motor LH harness connector and ground.

      (+)

      (-)

      Voltage

      (Approx.)

      Front power window motor LH

      Connector

      Terminal

      D9

      2

      Ground

      Battery voltage

    Is the inspection result normal?

    YES

    GO TO 5 .

    NO

    GO TO 4 .

  4. CHECK ENCODER POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect main power window and door lock/unlock switch connector.
    3. Check continuity between main power window and door lock/unlock switch harness connector and front power window motor LH harness connector.
      With Crew Cab

      Main power window and door lock/unlock switch

      Front power window motor LH

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      D7

      14

      D9

      2

      Yes
      Except Crew Cab

      Main power window and door lock/unlock switch

      Front power window motor LH

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      D5

      10

      D9

      2

      Yes
    4. Check continuity between main power window and door lock/unlock switch harness connector and ground.
      With Crew Cab

      Main power window and door lock/unlock switch

      Ground

      Continuity

      Connector

      Terminal

      D7

      14

      No
      Except Crew Cab

      Main power window and door lock/unlock switch

      Ground

      Continuity

      Connector

      Terminal

      D5

      12

      No

    Is the inspection result normal?

    YES

    Replace main power window and door lock/unlock switch. Refer to Removal and Installation .

    NO

    Repair or replace harness.

  5. CHECK GROUND CIRCUIT 1 
    1. Turn ignition switch OFF.
    2. Check continuity between front power window motor LH harness connector and ground.

      Front power window motor LH

      Ground

      Continuity

      Connector

      Terminal

      D9

      4

      Yes

    Is the inspection result normal?

    YES

    Replace front power window motor LH. Refer to Removal and Installation .

    NO

    GO TO 6 .

  6. CHECK GROUND CIRCUIT 2 
    1. Disconnect main power window and door lock/unlock switch connector.
    2. Check continuity between main power window and door lock/unlock switch harness connector and front power window motor LH harness connector.
      With Crew Cab

      Main power window and door lock/unlock switch

      Front power window motor LH

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      D7

      12

      D9

      4

      Yes
      Except Crew Cab

      Main power window and door lock/unlock switch

      Front power window motor LH

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      D5

      11

      D9

      4

      Yes
    3. Check continuity between main power window and door lock/unlock switch harness connector and ground.
      With Crew Cab

      Main power window and door lock/unlock switch

      Ground

      Continuity

      Connector

      Terminal

      D7

      12

      No
      Except Crew Cab

      Main power window and door lock/unlock switch

      Ground

      Continuity

      Connector

      Terminal

      D5

      11

      No

    Is the inspection result normal?

    YES

    Replace main power window and door lock/unlock switch. Refer to Removal and Installation .

    NO

    Repair or replace harness.

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