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BATTERY CURRENT SENSOR CALIBRATION
 
 
PURPOSE
The ECM 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.
  • Replacing the battery current sensor
  • Replacing the ECM
 
 
 
LEARNING PROCEDURE
1. After the ignition switch is in "LOCK" (OFF) position, disconnect the battery cable from the negative battery terminal.
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.
4. Connect the scan tool MB991958 to the data link connector (But do not start the engine).
5. Turn the ignition switch to the ON position.
6. Select "MFI" from System select Screen of the scan tool MB991958.
7. Select "Special Function" from MFI 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 scan tool MB991958 data list item No. 119 Battery current sensor calibration is "Completed".
12. After the ignition switch is in "LOCK" (OFF) position, disconnect the scan tool MB991958.
13. Install the battery current sensor.