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Home >> Nissan-Datsun >> 2005 >> Pathfinder LE, RWD >> Repair and Diagnosis >> Engine Performance >> Engine Control System >> DTC P1553: Battery Current Sensor >> Diagnostic Procedure
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Diagnostic Procedure

  1. CHECK GROUND CONNECTIONS 
    1. Turn ignition switch OFF.
    2. Loosen and retighten three ground screws on the body. Refer to GROUND INSPECTION .
      Fig 1: Locating Ground Screws Of Body
      G02432328Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    • OK: GO TO 2.
    • NG: Repair or replace ground connections.
  2. CHECK BATTERY CURRENT SENSOR POWER SUPPLY CIRCUIT 
    1. Disconnect battery current sensor harness connector.
    2. Turn ignition switch ON.
      Fig 2: Identifying Battery Current Sensor
      G02432329Courtesy of NISSAN MOTOR CO., U.S.A.
    3. Check voltage between battery current sensor terminal 1 and ground with CONSULT-II or tester.
      • Voltage: Approximately 5V 
      Fig 3: Checking Voltage Between Battery Current Sensor Connector Terminal 1 And Ground
      G02432330Courtesy of NISSAN MOTOR CO., U.S.A.

    OK or NG 

    • OK: GO TO  4.
    • NG: GO TO 3.
  3. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E5, F14
    • Harness for open or short between battery current sensor and ECM
      • Repair open circuit or short to ground or short to power in harness or connectors.
  4. CHECK BATTERY CURRENT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check harness continuity between battery current sensor terminal 2 and ECM terminal 67.
      • Continuity should exist. 
    4. Also check harness for short to ground and short to power.

    OK or NG 

    • OK: GO TO  6.
    • NG: GO TO 5.
  5. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E5, F14
    • Harness for open or short between battery current sensor and ECM
      • Repair open circuit or short to ground or short to power in harness or connectors.
  6. CHECK BATTERY CURRENT SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Check harness continuity between battery current sensor terminal 3 and ECM terminal 71.
      • Continuity should exist. 
    2. Also check harness for short to ground and short to power.

    OK or NG 

    • OK: GO TO  8.
    • NG: GO TO 7.
  7. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E5, F14
    • Harness for open or short between battery current sensor and ECM
      • Repair open circuit or short to ground or short to power in harness or connectors.
  8. CHECK BATTERY CURRENT SENSOR 

    Refer to COMPONENT INSPECTION .

    OK or NG 

    • OK: GO TO 9.
    • NG: Replace battery negative cable assembly.
  9. CHECK INTERMITTENT INCIDENT 

    Refer to TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

    • : INSPECTION END 
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