Mitsubishi Lancer (4A9 engine). Manual - part 17

PRECAUTIONS BEFORE SERVICE

GENERAL

00-65

• 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.
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.

SUPPLY PUMP CORRECTION LEARNING PROCEDURE <4N1>

M1001014400277

PURPOSE

The engine-ECU learns the relation between the 
suction control valve (linear solenoid valve) of the 
supply pump drive current and the fuel injection vol-
ume.

The learning value is calculated from the suction 
control valve drive current and the rail pressure sen-
sor 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.

PRECAUTIONS BEFORE SERVICE

GENERAL

00-66

LEARNING PROCEDURE

CAUTION

To prevent damage to M.U.T.-III, always turn the 
ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting M.U.T.-III.

AK800862AB

MB991827

MB991824

MB991910

Diagnosis connector

<L.H. drive vehicles>

AK800863

AB

MB991827

MB991824

Diagnosis connector

<R.H. drive vehicles>

MB991910

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: 60°C or higher

• Fuel temperature: 30°C or higher

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.

PRECAUTIONS BEFORE SERVICE

GENERAL

00-67

INITIALISATION PROCEDURE FOR 
LEARNING VALUE IN COMMON RAIL 
ENGINE <4N1>

M1001017800070

CAUTION

If the following services shown in the table are 
carried out on the common rail engine, use the 
M.U.T.-III to initialise the learning value. This is 
essential to early and correctly operate the 
exhaust gas processing system.
Initialising items

Service items

Initialisation item

Forcible DPF regeneration

At replacing supply pump *

No. 21 Supply pump exchange 
service

−

At replacing diesel particulate filter 
(DPF)

No. 40 DPF exchange service

−

At replacing exhaust differential 
pressure sensor

No. 41 DPF dp sensor exchange 
service

Necessary

At replacing catalytic converter

No. 42 DPF system malfunction 
service

Necessary

At replacing engine oil (Only in 
storing DTC P252F)

No. 43 Engine oil exchange 
service

−

At replacing EGR cooler

No. 53 Fuel consumption 
initialized

−

NOTE: *: After Initialising the learning value, carry out the supply pump correction learning in order to replace 
the supply pump. (Refer to 

P.00-65

).

PRECAUTIONS BEFORE SERVICE

GENERAL

00-68

INITIALISATION PROCEDURE

CAUTION

To prevent damage to M.U.T.-III, always turn the 
ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting M.U.T.-III.

AK800862AB

MB991827

MB991824

MB991910

Diagnosis connector

<L.H. drive vehicles>

AK800863

AB

MB991827

MB991824

Diagnosis connector

<R.H. drive vehicles>

MB991910

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 "Initialization" from Special Function 

Screen.

6. Select the appropriate initialising item from the 

Initialization Screen to initialise it.

7. Use M.U.T.-III to carry out the forcible DPF 

regeneration. [Refer to GROUP 17 

− Emission 

Control <DIESEL> 

− Diesel Particulate Filter 

(DPF) System 

− Forcible DPF Regeneration ].

BATTERY CURRENT SENSOR 
CALIBRATION <Low CO

2

 specification, 

FFV, 4N1, 4J1>

M1001018600251

PURPOSE

The engine-ECU 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 engine-ECU

LEARNING PROCEDURE

1. After the ignition switch is in "LOCK" (OFF) 

position, disconnect the battery cable from the 
negative battery terminal.

AK900075AB

Battery current
sensor

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.