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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different car >> Section 94 (Starting System (Circuit Diagnosis)) >> Circuit Diagnosis >> B Terminal 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 TERMINAL B POWER SUPPLY VOLTAGE 
    1. Turn ignition switch OFF.
    2. Make sure that starter motor connector F27 connection is clean and tight.
    3. Check voltage between starter motor connector F27 and ground.

      (+)

      (-)

      Voltage

      (Approx.)

      Connector

      Terminal

      F27

      B

      Ground

      Battery voltage

    Is the inspection result normal?

    YES

    GO TO 2

    NO

    Check harness between battery and starter motor for open circuit.

  2. CHECK BATTERY CABLE (VOLTAGE DROP TEST) 
    1. Shift the transmission into P (Park) or N (Neutral).
    2. Check voltage between battery positive terminal and starter motor connector F27 while cranking the engine.

    (+)

    (-)

    Condition

    Voltage

    (Approx.)

    Connector

    Terminal

    Battery (+) terminal

    F27

    B

    While cranking the engine

    Less than 0.5V

    Is the inspection result normal?

    YES

    GO TO 3 .

    NO

    Check harness between the battery and the starter motor for high resistance.

  3. CHECK GROUND CIRCUIT STATUS (VOLTAGE DROP TEST) 

    Check voltage between starter motor case and battery negative terminal while cranking the engine.

    (+)

    (-)

    Condition

    Voltage

    (Approx.)

    Starter motor case

    Battery (-) terminal

    While cranking the engine

    Less than 0.5V

    Is the inspection result normal?

    YES

    Terminal B circuit is OK. Further inspection is necessary. Refer to Work Flow (With DSS-5000P NI) or Work Flow (Without DSS-5000P NI) .

    NO

    Check the starter motor case to engine mounting for high resistance.