Mitsubishi Lancer Evolution IX. Manual - part 383

SPECIAL TOOLS

MULTIPORT FUEL INJECTION (MPI)

13A-7

MB991709

Test harness

• Measurement of voltage 

during troubleshooting

• Inspection using an 

oscilloscope

• Check of idle control servo

MD998478

Test harness (3-pin, triangle)

• Measurement of voltage 

during Troubleshooting

• Inspection using an 

oscilloscope

MD991536

Check harness for throttle 
position sensor adjustment

• Measurement of voltage 

during Troubleshooting

• Adjusting of throttle position 

sensor

MD998464

Test harness (4-pin, square)

• Measurement of voltage 

during Troubleshooting

• Inspection of oxygen sensor 

(front)

MB991658

Test harness

• Measurement of voltage 

during Troubleshooting

• Inspection of oxygen sensor 

(rear)

MB991223
A: MB991219
B: MB991220
C: MB991221
D: MB991222

Harness set
A: Test harness
B: LED harness
C: LED harness adapter
D: Probe

• Check at the ECU terminals

A: Connector pin contact 
inspection
B: Power circuit inspection
C: Power circuit inspection
D: Commercial tester 
connection

Tool

Number

Name

Use

MB991536

MB991658

MB991223

SPECIAL TOOLS

MULTIPORT FUEL INJECTION (MPI)

13A-8

MD998709

Adaptor hose

Measurement of fuel pressure

MD998742

Hose adaptor

MB991637

Fuel pressure gauge set

MB991981

Fuel pressure gauge set

MD998706

Injector test set

Checking the spray condition of 
injectors

MB991607

Injector test harness

MD998741

Injector test adaptor

MB991976

Clip

Tool

Number

Name

Use

MB991637

MB991981

MD998706

MB991607

MD998741

MB991976

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-9

TROUBLESHOOTING

DIAGNOSIS TROUBLESHOOTING FLOW

M1131150001572

Refer to 

P.00-5

, GROUP 00 

− How to Use Trouble-

shooting/Inspection Service Points.
NOTE: If the engine-ECU is replaced, the steering 
lock cylinder and ignition key should be replaced 
together with it.

DIAGNOSIS FUNCTION

M1131155501527

ENGINE WARNING LAMP (CHECK 
ENGINE LAMP)

If an abnormality occurs in any of the following items 
related to the Multipoint Fuel Injection (MPI) system, 
the engine warning lamp will illuminate.
If the lamp remains illuminated or if the lamp illumi-
nates while the engine is running, check the diagno-
sis code output.

AK501993AB

Engine warning lamp
(check engine lamp)

Engine warning lamp
(check engine lamp)

<L.H.drive vehicles>

<R.H.drive vehicles>

TROUBLESHOOTING

MULTIPORT FUEL INJECTION (MPI)

13A-10

ENGINE WARNING LAMP INSPECTION ITEMS

Code No.

Diagnosis item

−

Engine-ECU

P0090

Fuel pressure control valve system

P0100

Air flow sensor system

P0105

Barometric pressure sensor system

P0110

Intake air temperature sensor system

P0115

Engine coolant temperature sensor system

P0120

Throttle position sensor system

P0125*

Feedback system monitor

P0130

Oxygen sensor (front) system

P0135

Oxygen sensor heater (front) system

P0136

Oxygen sensor (rear) system

P0141

Oxygen sensor heater (rear) system

P0170

Abnormal fuel system

P0201

No. 1 injector system

P0202

No. 2 injector system

P0203

No. 3 injector system

P0204

No. 4 injector system

P0234

Turbocharger wastegate system malfunction

P0243

Waste gate solenoid valve system

P0300

Random cylinder misfire detection system

P0301*

No. 1 cylinder misfire detection system

P0302*

No. 2 cylinder misfire detection system

P0303*

No. 3 cylinder misfire detection system

P0304*

No. 4 cylinder misfire detection system

P0325

Detonation sensor system

P0335

Crank angle sensor system

P0340

Exhaust camshaft position sensor system

P0403

EGR control solenoid valve system

P0421

Warm up catalyst malfunction

P0443

Purge control solenoid valve system

P0500

Vehicle speed sensor system

P0505

Idle speed control system

P0551*

Power steering fluid pressure switch system

P0710

Transmission oil temperature sensor system

P1012

Intake camshaft position sensor system

P1021

Oil feeder control valve system

P1603*

Battery back-up line system