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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 75 (Charging System (Circuit Diagnosis)) >> Circuit Diagnosis >> L Terminal Circuit (Open) >> 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 "L" TERMINAL CONNECTION 
    1. Turn ignition switch OFF.
    2. Check if "L" terminal is clean and tight.

    Is the inspection result normal?

    YES

    GO TO 2

    NO

    Repair "L" terminal connection. Confirm repair by performing system test using DSS-5000P NI. Refer to applicable instruction manual for proper testing procedures.

  2. CHECK "L" TERMINAL CIRCUIT (OPEN) 
    1. Disconnect the generator connector F7.
    2. Apply ground to generator harness connector terminal.
    3. Check condition of the charge warning lamp with the ignition switch in the ON position.

      Generator

      Ground

      Condition

      Connector

      Terminal

      Ignition switch position

      Charge warning lamp

      F7

      2

      ON

      Illuminate

    Does it illuminate?

    YES

    "L" terminal circuit is normal. Refer to Work Flow (With DSS-5000P NI) or Work Flow (Without DSS-5000P NI) .

    NO

    GO TO 3.

  3. CHECK HARNESS CONTINUITY (OPEN CIRCUIT) 
    1. Disconnect the battery cable from the negative terminal.
    2. Disconnect the combination meter connector M24.
    3. Check continuity between generator harness connector F7 and combination meter harness connector M24.

      Generator

      Combination meter

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F7

      2

      M24

      11

      Yes

    Is the inspection result normal?

    YES

    GO TO 4.

    NO

    Repair or replace the harness or connectors.

  4. CHECK HARNESS CONTINUITY (OPEN CIRCUIT) 

    Check continuity between combination meter harness connector M23 and fuse block (J/B) M5.

    Combination meter

    Fuse block (J/B)

    Continuity

    Connector

    Terminal

    Connector

    Terminal

    M23

    44

    M5

    8P

    Yes

    Is the inspection result normal?

    YES

    GO TO 5.

    NO

    Repair or replace the harness or connectors.

  5. CHECK POWER SUPPLY CIRCUIT 
    1. Connect the battery cable to the negative terminal.
    2. Check voltage between combination meter harness connector M23 and ground.

      (+)

      (-)

      Condition

      Voltage

      (Approx.)

      Combination meter

      Connector

      Terminal

      M23

      44

      Ground

      When the ignition switch is in ON position

      Battery voltage

    Is the inspection result normal?

    YES

    Replace the combination meter. Refer to Removal and Installation .

    NO

    Repair or replace the harness or connectors.