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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 471 (Automatic Transmission (Re5R05A) (DTC/Circuit Diagnosis)) >> DTC/Circuit Diagnosis >> Power Supply And Ground Circuit >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different car, the 2019 Nissan NV3500 HD, 2019 Nissan NV2500 HD, and 2019 Nissan NV1500. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK TCM POWER SOURCE (PART 1) 
    1. Turn ignition switch OFF.
    2. Disconnect A/T assembly connector.
    3. Check voltage between A/T assembly harness connector terminals and ground.
      G04075552Courtesy of NISSAN NORTH AMERICA, INC.

      A/T assembly

      Ground

      Voltage

      Connector

      Terminal

      F9

      1

      Ground

      Battery voltage

      2

      6

      0 V

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    GO TO 7.

  2. CHECK TCM POWER SOURCE (PART 2) 
    1. Turn ignition switch ON.
      CAUTION: Never start engine.
    2. Check voltage between A/T assembly harness connector terminals and ground.
      G04075553Courtesy of NISSAN NORTH AMERICA, INC.

      A/T assembly

      Ground

      Voltage

      Connector

      Terminal

      F9

      1

      Ground

      Battery voltage

      2

      6

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    GO TO 8.

  3. CHECK TCM GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Check continuity between A/T assembly harness connector terminals and ground.
      G04075554Courtesy of NISSAN NORTH AMERICA, INC.

      A/T assembly

      Ground

      Continuity

      Connector

      Terminal

      F9

      5

      Ground

      Existed

      10

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace damaged parts.

  4. DETECT MALFUNCTIONING ITEM 

    Check the following items:

    • The A/T assembly harness connector terminals for damage or loose connection with harness connector.

    Is the inspection result normal?

    YES

    GO TO 5.

    NG

    Repair or replace damaged parts.

  5. PERFORM SELF-DIAGNOSIS 

    Perform self-diagnosis. Refer to CONSULT Function .

    Is the inspection result normal?

    YES

    INSPECTION END

    NO

    GO TO 6.

    NO

    Check the malfunctioning system. Refer to CONSULT Function .

  6. CHECK TERMINAL CORD ASSEMBLY 
    1. Remove control valve with TCM. Refer to Removal and Installation .
    2. Disconnect A/T assembly connector and TCM connector.
    3. Check continuity between A/T assembly harness connector terminals and TCM harness connector terminals.
      G04075555Courtesy of NISSAN NORTH AMERICA, INC.

      A/T assembly

      TCM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F9

      1

      F502

      9

      Existed

      2

      10

      6

      4
    4. Check continuity between A/T assembly harness connector terminals and TCM connector terminals.
      G04075556Courtesy of NISSAN NORTH AMERICA, INC.

      A/T assembly

      TCM

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F9

      5

      F504

      21

      Existed

      10

      22
    5. If OK, check harness for short to ground and short to power.

    OK or NG

    YES

    Replace the control valve with TCM. Refer to Removal and Installation .

    NO

    Replace open circuit or short to ground and short to power in harness or connectors.

  7. DETECT MALFUNCTIONING ITEM (STEP 1) 

    Check the following items:

    • Harness for short or open between battery and A/T assembly harness connector terminals 1, 2
    • 10A fuse [No. 30]
    • Battery

    Is the inspection result normal?

    OK

    GO TO 2.

    NO

    Repair or replace damaged parts.

  8. CHECK TCM (TRANSMISSION CONTROL MODULE) RELAY 
    1. Disconnect TCM relay.
    2. Check TCM relay. Refer to Component Inspection (TCM Relay) .

    Is the inspection result normal?

    YES

    GO TO 9.

    NO

    Repair or replace damaged parts.

  9. CHECK HARNESS BETWEEN TCM RELAY AND FUSE BLOCK (J/B)/IPDM E/R 
    1. Disconnect fuse block (J/B) connector M3 and IPDM E/R connector E119.
    2. Check continuity between TCM relay harness connector (A) terminal and fuse block (J/B) harness connector (B) terminal.
      GNSJSDIA2780Z-780Courtesy of NISSAN NORTH AMERICA, INC.
      NOTE:

      Fuse block (J/B)

      TCM relay

      Continuity

      +

      -

      Connector

      Terminal

      Connector

      Terminal

      M3

      2N

      M88

      1

      Existed

      Fuse block (J/B)

      TCM relay

      Continuity

      -

      +

      Connector

      Terminal

      Connector

      Terminal

      M3

      2N

      M88

      1

      Not existed
    3. Check continuity between TCM relay harness connector (A) terminal and IPDM E/R harness connector (B) terminal.
      GNSJSDIA2781Z-781Courtesy of NISSAN NORTH AMERICA, INC.
      NOTE:

      IPDM E/R

      TCM relay

      Continuity

      +

      -

      Connector

      Terminal

      Connector

      Terminal

      E119

      14

      M88

      1

      Existed

      IPDM E/R

      TCM relay

      Continuity

      -

      +

      Connector

      Terminal

      Connector

      Terminal

      E119

      14

      M88

      1

      Not existed
    4. If OK, check harness for short to ground and short to power.

    Is the inspection result normal?

    OK

    GO TO 10.

    NO

    Repair or replace damaged parts.

  10. CHECK GROUND CIRCUIT 

    Check continuity between TCM relay harness connector terminal and ground.

    GNSJSDIA2782Z-782Courtesy of NISSAN NORTH AMERICA, INC.

    TCM relay

    Ground

    Continuity

    Connector

    Terminal

    M88

    3

    Ground

    Existed

    Is the inspection result normal?

    OK

    GO TO 11.

    NO

    Repair or replace damaged parts.

  11. DETECT MALFUNCTIONING ITEM (STEP 3) 

    Check the following items:

    • Harness for short or open between ignition switch and fuse block (J/B) connector M3 terminal 2N
    • Harness for short or open between battery and IPDM E/R connector E119 terminal 14
    • 10A fuse [No. 9, located in the fuse block (J/B)] and 10A fuse (No. 49, located in the IPDM E/R)
    • IPDM E/R (Ignition relay)
    • Ignition switch

    Is the inspection result normal?

    YES

    GO TO 12.

    NO

    Repair or replace damaged parts.

  12. CHECK TCM RELAY POWER CIRCUIT 

    Check voltage between TCM relay harness connector terminal and ground.

    GNSJSDIA2783Z-783Courtesy of NISSAN NORTH AMERICA, INC.

    TCM relay

    Ground

    Condition

    Voltage

    Connector

    Terminal

    M88

    3

    Ground

    Always

    Battery voltage

    Is the inspection result normal?

    YES

    GO TO 13.

    NO

    Replace open circuit or short to ground in harness or connector.

  13. CHECK HARNESS BETWEEN TCM RELAY AND A/T ASSEMBLY 
    1. Check continuity between TCM relay harness connector (A) terminal and A/T assembly harness (B) connector.
      GNSJSDIA2784Z-784Courtesy of NISSAN NORTH AMERICA, INC.

      TCM relay

      A/T assembly

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      M88

      5

      F9

      6

      Existed
    2. If OK, check harness for short to ground and short to power.

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace damaged parts.

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