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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 43 (Automatic Transaxle (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> DTC P0826: Up And Down Shift SW >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2018 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK DTC (COMBINATION METER) 

    SYMBOL With CONSULT

    1. Turn ignition switch ON.
    2. Select "Self Diagnostic Results" in "METER/M&A".

    Is any DTC detected?

    YES

    Check DTC detected item. Refer to DTC Index .

    NO

    GO TO STEP 2  .

  2. CHECK MANUAL MODE SWITCH SIGNALS 

    SYMBOL With CONSULT

    1. Turn ignition switch ON.
    2. Select "Data Monitor" in "TRANSMISSION".
    3. Check the On/Off operations of each monitor item.

      Item name

      Monitor item

      Condition

      Status

      Manual mode switch

      M MODE

      Manual shift gate position

      On

      Other than the above

      Off

      NON M MODE

      Manual shift gate position

      Off

      Other than the above

      On

      UPLVR

      Selector lever: UP (+ side)

      On

      Other than the above

      Off

      DOWNLVR

      Selector lever: DOWN (- side)

      On

      Other than the above

      Off

      Paddle shifter*

      STRDWNSW

      Pressed paddle shifter (shift-down)

      On

      Released paddle shifter

      Off

      STRUPSW

      Pressed paddle shifter (shift-up)

      On

      Released paddle shifter

      Off

      * : With paddle shifter

    SYMBOL Without CONSULT

    Drive vehicle in the manual mode, and confirm that the actual gear position and the meter's indication of the position mutually coincide when the selector lever and paddle shifter* are shifted to the "+ (up)" or - "(down)" side [1st - 7th gear].

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    GO TO STEP 3  .

    NO

    GO TO STEP 8  .

  3. CHECK MANUAL MODE SWITCH POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect CVT shift selector connector.
    3. Turn ignition switch ON.
    4. Check voltage between CVT shift selector harness connector terminal and ground.

      +

      -

      Condition

      Voltage

      (Approx.)

      CVT shift selector

      Connector

      Terminal

      M78

      7

      Ground

      Ignition switch: ON

      12 V

      Ignition switch: OFF

      0 V

      8

      Ignition switch: ON

      12 V

      Ignition switch: OFF

      0 V

      9

      Ignition switch: ON

      12 V

      Ignition switch: OFF

      0 V

      10

      Ignition switch: ON

      12 V

      Ignition switch: OFF

      0 V

    Is the inspection result normal?

    YES

    GO TO STEP 4  .

    NO

    GO TO STEP 5  .

  4. CHECK MANUAL MODE SWITCH 
    1. Turn ignition switch OFF.
    2. Check manual mode switch. Refer to Component Inspection (Manual Mode Switch) .

    Is the inspection result normal?

    YES

    GO TO STEP 7  .

    NO

    Repair or replace damaged parts.

  5. CHECK CIRCUIT BETWEEN CVT SHIFT SELECTOR AND COMBINATION METER (PART 1) 
    1. Turn ignition switch OFF.
    2. Disconnect combination meter connector.
    3. Check continuity between CVT shift selector harness connector terminals and combination meter harness connector terminals.

      CVT shift selector

      Combination meter

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M78

      7

      M24

      30

      Existed

      8

      33

      9

      32

      10

      31

    Is the inspection result normal?

    YES

    GO TO STEP 6  .

    NO

    Repair or replace damaged parts.

  6. CHECK CIRCUIT BETWEEN CVT SHIFT SELECTOR AND COMBINATION METER (PART 2) 

    Check continuity between CVT shift selector harness connector terminals and ground.

    CVT shift selector

    -

    Continuity

    Connector

    Terminal

    M78

    7

    Ground

    Not existed

    8

    9

    10

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Repair or replace damaged parts.

  7. CHECK GROUND CIRCUIT 

    Check continuity between CVT shift selector harness connector terminal and ground.

    CVT shift selector

    -

    Continuity

    Connector

    Terminal

    M78

    11

    Ground

    Existed

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    Repair or replace damaged parts.

  8. CHECK PADDLE SHIFTER 
    1. Turn ignition switch OFF.
    2. Disconnect paddle shifter connector.
    3. Turn ignition switch ON.
    4. Check voltage between paddle shifter side harness connector terminals.

    Paddle shifter

    Voltage (Approx.)

    Connector

    Terminal

    M82

    3

    1

    12 V

    M83

    3

    1

    Is the inspection result normal?

    YES

    GO TO STEP 9  .

    NO

    GO TO STEP 11  .

  9. CHECK PADDLE SHIFTER 

    Check paddle shifter. Refer to Component Inspection (Paddle Shifter) .

    Is the inspection result normal?

    YES

    GO TO STEP 10  .

    NO

    Repair or replace damaged parts.

  10. CHECK GROUND CIRCUIT 

    Check continuity between paddle shifter vehicle side harness connector terminal and ground.

    Paddle shifter

    Ground

    Continuity

    Connector

    Terminal

    M82

    1

    Existed

    M83

    1

    Is the inspection result normal?

    YES

    GO TO STEP 11  .

    NO

    Repair or replace damaged parts.

  11. CHECK POWER SOURCE CIRCUIT 

    Check voltage between paddle shifter vehicle side harness connector terminal and ground.

    Paddle shifter

    Ground

    Voltage (Approx.)

    Connector

    Terminal

    M82

    3

    0 V

    M83

    3

    Is the inspection result normal?

    YES

    GO TO STEP 12  .

    NO

    Repair or replace damaged parts.

  12. CHECK HARNESS BETWEEN PADDLE SHIFTER AND COMBINATION METER (PART 1) 
    1. Disconnect combination meter connector.
    2. Check continuity between paddle shifter vehicle side harness connector terminals and combination meter vehicle side harness connector terminals.

      Paddle shifter

      Combination meter

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M82

      3

      M24

      34

      Existed

      M83

      3

      35

    Is the inspection result normal?

    YES

    GO TO STEP 13  .

    NO

    Repair or replace damaged parts.

  13. CHECK HARNESS BETWEEN PADDLE SHIFTER AND COMBINATION METER (PART 2) 

    Check continuity between paddle shifter vehicle side harness connector terminals and ground.

    Paddle shifter

    Ground

    Continuity

    Connector

    Terminal

    M82

    3

    Not existed

    M83

    3

    Is the inspection result normal?

    YES

    GO TO STEP 14  .

    NO

    Repair or replace damaged parts.

  14. DETECT MALFUNCTIONING ITEMS 

    Check TCM connector pin terminals for damage or loose connection with harness connector.

    Is the inspection result normal?

    YES

    Replace TCM. Refer to Removal and Installation .

    NO

    Repair or replace damaged parts.

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