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The engine-ECU carries out the
electrical generation control according to the charge level
of the battery, based on the battery current sensor signal.
To improve the effect of reducing the fuel consumption by
the electrical generation control, it is necessary to
accurately detect the charge level of the battery. For this,
if the following services are performed, carry out the
battery current sensor calibration.
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- Replacing the battery current sensor
- Replacing the engine-ECU
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1.After the ignition switch
is in the "LOCK" (OFF) position <except vehicles with
KOS> (or put the power supply mode is OFF
<vehicles with KOS>), disconnect the battery
cable from the negative battery terminal.
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![](../../../img/00/AKB00261AB00ENG.png)
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2.Remove the battery current
sensor from the battery cable (Do not disconnect the battery
current sensor connector). 3.Connect the battery
cable without the battery current sensor to the negative
battery terminal.
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![](../../../img/00/ACE00805AC00ENG.png)
![](../../../img/00/ACE00807AC00ENG.png)
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4.Connect the M.U.T.-III to
the diagnosis connector (But do not start the
engine). 5.Turn the ignition switch to the "ON"
position <except vehicles with KOS> (or put the
power supply mode is ON <vehicles with
KOS>). 6.Select "MPI/GDI/DIESEL" from System
select Screen of the M.U.T.-III. 7.Select
"Special Function" from MPI/GDI/DIESEL
Screen. 8.Select "Learning" from Special Function
Screen. 9.Select
"Battery current SNSR.calibration" from Learning
Screen. 10.Start the calibration by pressing the
"OK" button. 11.Confirm that the M.U.T.-III data
list item No. 452 Battery current sensor calibration is
"Completed". 12.After the ignition switch is in
"LOCK" (OFF) position<except vehicles with KOS>
(or put the power supply mode is OFF <vehicles with
KOS>), disconnect the M.U.T.-III. 13.Install
the battery current sensor.
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