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Home >> Infiniti >> 2008 >> G37 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 66 (Engine Control System - DTCS P0643 To P2A03) >> P1553 Battery Current Sensor >> Component Inspection >> Battery Current Sensor
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Battery Current Sensor

WARNING: This page is about a different car, the 2008 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
  1. Reconnect harness connectors disconnected.
  2. Disconnect battery negative cable (1).
  3. Install jumper cable (A) between battery negative terminal and body ground.
  4. Turn ignition switch ON.
    Fig 1: Identifying Jumper Cable And Battery Negative Cable
    G04900632Courtesy of NISSAN MOTOR CO., U.S.A.
  5. Check voltage between ECM terminal 71 (battery current sensor signal) and ground.

    Voltage: Approximately 2.5V 

  6. If NG, replace battery negative cable assembly.
Fig 2: Checking Voltage Between ECM Terminal 71 (Battery Current Sensor Signal) And Ground
G04900633Courtesy of NISSAN MOTOR CO., U.S.A.
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