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Home >> Subaru >> 2013 >> BRZ Limited, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (Charging System) >> Charging System (FA20) >> Data Monitor/Active Test
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Data Monitor/Active Test

WARNING: This page is about a different car, the 2018 Subaru BRZ. However, it is still accessible from the selected car via links, so may be relevant.
  1. Data monitor
    1. Use the SSM4 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 value of the data monitor/active test 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.
    PART NAME DESCRIPTION

    Item name Description/display range Normal value Remarks (Main inspection items during a malfunction)
    [Control module voltage]
    • Indicates the battery voltage.
    • Display range: 0 to 65.535 V
    		 11 to 14 V: During idling 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 to 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 from the battery temperature sensor (battery current sensor ASSY).
    • Display range: -40 to 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 Voltage - 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 Voltage - 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 the active test [Alternator control] is carried out: After engine is started
    • Indicates the generation voltage during [Active Test].
    • 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 to 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.
    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 -
    [Alternator Mechanical Error Status] Displayed when it is determined that there is a mechanical error on the alternator. 0 -
    [Alternator Electrical Output Error Status] Displayed when it is determined that there is an electrical error on the alternator. 0  
    [Alternator High Temperature Error Status] Displayed when it is determined that there is a high temperature error on the alternator. 0 -
    [Alternator Communication Error Status] Displayed when it is determined that there is a communication error on the alternator. 0 -
    [Regulator Temperature] Alternator regulator temperature 170°C or less -
  2. Active test
    1. Using SSM4, display the [Active Test] screen according to the screen and perform the system operation check.
    PART NAME DESCRIPTION

    Item Contents Restrictions
    [Alternator control] Increases or decreases the alternator generation request voltage.
    Able to request within the range of 12.8 - 14.3 V.    		 While engine running
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