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To keep emission and noise level at
adequate levels, the engine-ECU must learn injector fuel
injection in idle mode.
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During learning, the engine-ECU
calculates actual injection from each cylinder based on
changes in engine speeds and corrects pilot injection
control. It then keeps records of this amount of correction
as a learned value.
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For this reason, after the
engine-ECU or injector is replaced, learning must be
executed using the M.U.T.-III.
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![](../../../img/00/ACB05017AB00ENG.png)
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1.After the ignition switch
is in "LOCK" (OFF) position, connect the M.U.T.-III to the
diagnosis connector. 2.Put the vehicle in the
following idling stable conditions:
- Engine coolant temperature: 76 -
100°C
- Fuel temperature: 30 - 100°C
- Intake air temperature: -30 to
100°C
- Barometric pressure: 70 kPa or more
- Lamps, radiator fan and all accessories:
OFF
- Transmission: Neutral
- Power steering: Static state
3.Select "MPI/GDI/DIESEL" from System select
Screen of the M.U.T.-III. 4.Select
"Special Function" from MPI/GDI/DIESEL
Screen. 5.Select "Learning" from Special Function
Screen. 6.Select Item No. 1
"Small Injection qt. Learning" from the Learning Screen to
execute learning.
caution |
If the vehicle
conditions go out of the learning conditions
during idling, learning is interrupted.
To reexecute learning, the ignition switch
must once be turned off.
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7.Continue idling for about 3 minutes before
learning is completed. 8.Confirm that the engine
warning lamp is off. If it still blinks, reexecute
learning.
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