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BASIC SERVICE PROCEDURE
EC-1473
[YD (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Fuel Pump Learning Value Clearing BBS0027D
DESCRIPTION
In order to always keep optimum fuel pressure in fuel rail, the ECM controls fuel pump in high precision with
monitoring the signal of fuel rail pressure sensor.
Accordingly, the ECM always learns characteristic value of fuel pump. Fuel Pump Learning Value Clearing is
an operation to clear the value of the fuel pump learning.
Fuel Pump Learning Value Clearing should be performed under the following conditions.
● Fuel pump is changed.
● ECM is replaced with used one which stores the fuel pump learning value of other fuel pump.
OPERATION PROCEDURE
NOTE:
When removing fuel pump, perform Fuel Pump Learning Value Clearing before starting engine.
With CONSULT-II
1. Turn ignition switch ON.
2. Select “PUMP LEARNT CLEAR” in “ACTIVE TEST” mode with
CONSULT-II.
3. Touch “CLEAR” and wait a few seconds.
4. Make sure that “CMPLT” is displayed on CONSULT-II screen.
Without CONSULT-II
Fuel pump learning value can be erased from the back up memory in the ECM by the same operation as eras-
ing DTC.In detail, refer to EC-1476, "
Without CONSULT-II" .
MBIB0896E
MBIB0893E
MBIB0894E
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