LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Brake Control System (W/O Intelligent Cruise Control) (DTC/Circuit Diagnosis)) >> DTC / Circuit Diagnosis >> Power Supply And Ground Circuit >> 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 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) IGNITION POWER SUPPLY 
    1. Turn the ignition switch OFF.
    2. Disconnect ABS actuator and electric unit (control unit) harness connector.
    3. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

      ABS actuator and electric unit (control unit)

      -

      Voltage

      (Approx.)

      Connector

      Terminal

      E26

      28

      Ground

      0 V
    4. Turn the ignition switch ON
      NOTE: Start the engine.
    5. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

      ABS actuator and electric unit (control unit)

      -

      Voltage

      (Approx.)

      Connector

      Terminal

      E26

      28

      Ground

      Battery voltage

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    GO TO 2.

  2. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) IGNITION POWER SUPPLY CIRCUIT 
    1. Turn the ignition switch OFF.
    2. Check the 10A fuse (46).
    3. Disconnect IPDM E/R harness connector.
    4. Check the continuity between ABS actuator and electric unit (control unit) harness connector and IPDM E/R.

      ABS actuator and electric unit (control unit)

      IPDM E/R

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      E26

      28

      E19

      35

      Yes
    5. Check the continuity between ABS actuator and electric unit (control unit) harness connector and ground.

      ABS actuator and electric unit (control unit)

      -

      Continuity

      Connector

      Terminal

      E26

      28

      Ground

      No

    Is the inspection result normal?

    YES

    Perform trouble diagnosis for ignition power supply.

    NO

    Repair / replace harness, connector, or fuse.

  3. CHECK MOTOR AND MOTOR RELAY POWER SUPPLY 
    1. Turn the ignition switch OFF.
    2. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

      ABS actuator and electric unit (control unit)

      -

      Voltage

      (Approx.)

      Connector

      Terminal

      E26

      1

      Ground

      Battery voltage
    3. Turn the ignition switch ON.
      NOTE: Start the engine.
    4. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

      ABS actuator and electric unit (control unit)

      -

      Voltage

      (Approx.)

      Connector

      Terminal

      E26

      1

      Ground

      Battery voltage

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    GO TO 4.

  4. CHECK MOTOR AND MOTOR RELAY POWER SUPPLY CIRCUIT 
    1. Turn the ignition switch OFF.
    2. Check the 40A fusible link (G).
    3. Check the continuity and short circuit between ABS actuator and electric unit (control unit) harness connector terminal 1 and 40A fusible link (G).

    Is the inspection result normal?

    YES

    Perform trouble diagnosis for battery power supply.

    NO

    Repair / replace harness, connector, or fusible link.

  5. CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE POWER SUPPLY 
    1. Turn the ignition switch OFF.
    2. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

      ABS actuator and electric unit (control unit)

      -

      Voltage

      (Approx.)

      Connector

      Terminal

      E26

      25

      Ground

      Battery voltage
    3. Turn the ignition switch ON
      NOTE: Start the engine.
    4. Check the voltage between ABS actuator and electric unit (control unit) harness connector and ground.

      ABS actuator and electric unit (control unit)

      -

      Voltage

      (Approx.)

      Connector

      Terminal

      E26

      25

      Ground

      Battery voltage

    Is the inspection result normal?

    YES

    GO TO 7.

    NO

    GO TO 6.

  6. CHECK ACTUATOR RELAY, ABS IN VALVE, ABS OUT VALVE POWER SUPPLY CIRCUIT 
    1. Turn the ignition switch OFF.
    2. Check the 40A fusible link (H).
    3. Check the continuity and short circuit between ABS actuator and electric unit (control unit) harness connector terminal 25 and 40A fusible link (H).

    Is the inspection result normal?

    YES

    Perform trouble diagnosis for battery power supply.

    NO

    Repair / replace harness, connector, or fusible link.

  7. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) GROUND CIRCUIT 

    Check the continuity between ABS actuator and electric unit (control unit) harness connector and the ground.

    ABS actuator and electric unit (control unit)

    -

    Continuity

    Connector

    Terminal

    E26

    13

    Ground

    Yes

    38

    Is the inspection result normal?

    YES

    GO TO 8.

    NO

    Repair / replace harness, connector, or terminal.

  8. CHECK TERMINAL 
    1. Check the ABS actuator and electric unit (control unit) pin terminals for damage or loose connection with harness connector.
    2. Check the IPDM E/R pin terminals for damage or loose connection with harness connector.

    Is the inspection result normal?

    YES

    Replace the ABS actuator and electric unit (control unit). Refer to Removal and Installation .

    NO

    Repair / replace harness, connector, or terminal.

scientia non olet · About LEMON Manuals