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Because individual injectors have
different injection characteristics, the engine-ECU
corrects injection time for each cylinder to improve
injection accuracy. For this reason, when the injector or
engine-ECU is replaced, injector correction data
must be registered afterwards in the engine-ECU using the
Multi Use Tester III (M.U.T.-III). Correction data is
converted into an identification code consisting of 30
alphanumeric
characters and printed on the injector connector.
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1.When replacing the
engine-ECU, connect the current engine-ECU to the body
harness.
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2.After the ignition switch
is in "LOCK" (OFF) position, connect the M.U.T.-III to the
diagnosis connector.
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3.Turn the ignition switch
to "ON" position.
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4.Select SPECIAL FUNCTION
from the function menu.
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5.When the current
engine-ECU is still mounted, read and register the injector
identification
code as follows: (1)
Select Read Injector ID Code (for engine-ECU replacement)
from the SPECIAL FUNCTION
menu. (2)
Select Write and Save Injector ID Code from the menu to read
data from the current
engine-ECU and save the data if it could be read
normally. (3)
Mount the new engine-ECU on the vehicle. (4)
Select SPECIAL FUNCTION from the function menu. (5)
Select Write Injector ID Code (for engine-ECU replacement)
from the SPECIAL FUNCTION
menu. (6)
Select SAVED INJECTOR ID WRITING from the Write Injector ID
Code menu to write the
data, which was saved previously, to the
engine-ECU.
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6.If the injector has been
replaced or data has not been read from the current
engine-ECU,
register the injector identification code as follows: (1)
Select Write Injector ID Code from the SPECIAL FUNCTION
menu. (2)
If the injector was replaced, specify whether to write to
every cylinder or a specific
cylinder. (3)
Select the write mode from the menu, enter the
identification code printed on the injector,
and execute writing.
caution |
Even if the number of the
cylinder to be registered does not
match the actual injector mounting location,
registration ends normally. Specify the cylinder
number correctly.
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note |
The identification code is
displayed in order of the frame numbers when it
is read.
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7.Makes sure that the engine warning lamp
that is on changes to blinking, indicating
the registration is complete.
note |
When the injector is replaced,
executing the write operation also clears the
values of
small injection quantity learning.
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8.Execute small injection quantity
learning. Refer to , the SMALL
INJECTION QUANTITY LEARNING PROCEDURE
for the learning procedure. 9.Confirm that the
engine warning lamp is off. Confirm also that the
diagnosis code is not stored.
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