|
The engine-ECU learns the relation
between the suction control valve (linear solenoid valve) of
the supply pump drive current and the fuel injection
volume.
|
|
The learning value is calculated
from the suction control valve drive current and the rail
pressure sensor output voltage.
|
|
When the suction control valve or
supply pump is replaced, therefore, this learning must be
executed.
|
|
Re-learning is executed when the
engine is idling after the learning value in the engine-ECU
has been reset by the M.U.T.-III.
|
![](../../../img/00/ACB05017AB00ENG.png)
|
1.After the ignition switch
is in "LOCK" (OFF) position, connect the M.U.T.-III to the
diagnosis connector. 2.Turn the ignition switch to
the "ON" position. (Do not start the
engine.) 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 "Initialisation" from Special
Function Screen. 6.Select Item No. 21
"Supply pump exchange service" from "Initialisation Screen
and execute the initialisation of learning
value.
- Accelerator pedal: OFF (not depressed)
- Engine coolant temperature: 50 -
100°C
- Fuel temperature: 20 - 60°C
7.After initialising, run the engine at idle in
the following conditions for 30 seconds. 8.Confirm
that the Item No. 65 "High press. pump learned status" on
M.U.T.-III Data List is "2".
note |
"2" indicates that the
learning has completed.
|
|