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Home >> Nissan-Datsun >> 2016 >> Sentra SL >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (DTCS) (2 Of 3) >> DTC/Circuit Diagnosis >> DTC P1550: Battery Current Sensor >> Diagnosis Procedure >> Diagnostic Test
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Diagnostic Test

  1. CHECK BATTERY CURRENT SENSOR POWER SUPPLY

    1. Turn ignition switch OFF.
    2. Disconnect battery current sensor harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between battery current sensor harness connector and ground.
      + - Voltage
      (Approx.)
      Battery current sensor
      Connector Terminal
      F54 1 Ground 5.0 V

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    GO TO STEP 2  .

  2. CHECK SENSOR POWER SUPPLY 2 CIRCUIT

    Check sensor power supply 2 circuit. Refer to DIAGNOSIS PROCEDURE .

    Is the inspection result normal?

    YES 

    Perform the trouble diagnosis for power supply circuit.

    NO 

    Repair or replace error-detected parts.

  3. CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between battery current sensor harness connector and ECM harness connector.
      + - Continuity
      Battery current sensor ECM
      Connector Terminal Connector Terminal
      F54 3 F25 62 Existed
    4. Also check harness for short to power.

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Repair or replace error-detected parts.

  4. CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT

    1. Check the continuity between battery current sensor harness connector and ECM harness connector.
      + - Continuity
      Battery current sensor ECM
      Connector Terminal Connector Terminal
      F54 4 F25 63 Existed
    2. Also check harness for short to ground and to power.

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    Repair or replace error-detected parts

  5. CHECK BATTERY CURRENT SENSOR

    Check the battery current sensor. Refer to COMPONENT INSPECTION (BATTERY CURRENT SENSOR) .

    Is the inspection result normal?

    YES 

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

    NO 

    Replace battery current sensor. Refer to REMOVAL AND INSTALLATION .