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Home >> Subaru >> 2014 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> Electrical >> Charging Systems >> Charging System >> Charging System (FA20) >> Current Data Display & Save / System Operation Check Mode
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Current Data Display & Save / System Operation Check Mode

  1. Current data display & save
    1. Use the SSM3 and follow the display to bring up the [Normal sampling] screen in order to inspect the computer data.
      CAUTION: Due to slight measurement differences and factors such as differences in the measurement environment or vehicle aged-related variation, the current data display & save / system operation check mode value can be widely varied. It is difficult to obtain a precise standard value (determined value) for this. Therefore, there may be cases where a fault is present, even if it is within the reference value.
      SSM3 SCREEN: [BRZ CHECK] →[EACH SYSTEM CHECK] →[ENGINE CONTROL SYSTEM]→[CURRENT DATA DISPLAY & SAVE] →[NORMAL SAMPLING]

      Item name Description/display range Normal value Remarks (Main inspection items during a malfunction)
      [Control module voltage]
      • Indicates the battery voltage.
      • Display range: 0 - 65.535 V
      11 to 14 V: At idling speed Reference value:
      • IG ON: 12.5 V
      • While cranking: 9.834 V
      • At idling speed (after being warmed up): 13.359 V

      If the battery voltage 11 V or less, other systems may be affected.
      [Battery Current]
      • Indicates the battery current.
      • Display range: -125 - 125 A
      Changes depending on the alternator generation amount: After warming up, when driving When a malfunction occurs, it may be due to a problem with the IB voltage system or sensor power supply.
      [Battery Temperature]
      • Indicates the battery ambient temperature which is calculated from the output of the battery temperature sensor (battery current sensor ASSY).
      • Display range: -40 - 6513.5°C
      Changes depending on the actual temperature: After warming up, when driving When a malfunction occurs, it may be due to a problem with the THB voltage system or sensor power supply.
      [Alt Vol - Non Active Test]
      • Indicates the requested voltage when forced driving of the regulator is not being carried out.
      • Display range: 0 - 80 V
      Changes depending on the battery fluid temperature, driving conditions (12.4 - 14.8 V): After engine is started When a malfunction occurs, it may be due to a problem with the charging control system.
      [Alt Vol - Active Test]
      • Indicates the requested voltage when forced driving of the regulator is being carried out.
      • Display range: 0 - 80 V
      Value of the request instruction voltage when system operation check mode [Alternator control] is carried out: After engine is started
      • Indicates the generation voltage during [System Operation Check Mode].
      • When a malfunction occurs, it may be due to a problem with the charging control system.
      [ALT Duty]
      • Indicates the charging control signal.
      • Display range: 0 - 255 %
      Changes depending on the alternator generation amount: During charging control When a malfunction occurs, it may be due to a problem with the charging control system.
      [Alternator control mode]
      • Indicates the alternator generation control mode.
      • Display range: 0 - 255 %
      Changes depending on the alternator generation amount: During charging control When a malfunction occurs, it may be due to a problem with the charging control system.
  2. System operation check mode.
    1. Use the SSM3 and follow the display to bring up the [System Operation Check Mode] screen in order to perform a system operation check.
      SSM3 SCREEN: [ENGINE CONTROL SYSTEM] →[WORK SUPPORT] →[SYSTEM OPERATION CHECK MODE]

      Item Contents Restrictions
      [Alternator control] Increases or decreases the alternator generation request voltage. Able to request within the range of 12.8 - 14.1 V. While engine running