Mitsubishi Lancer Evolution IX. Manual - part 481

ON-VEHICLE SERVICE

MULTIPORT FUEL INJECTION (MPI)

13A-399

3. Disconnect the fuel pump module connector.

4. After starting the engine and letting it run until it 

stops naturally, turn the ignition switch to the 
"LOCK" (OFF) position.

5. Connect the fuel pump module connector.
6. Install the protector and rear seat assembly (Refer 

to GROUP 52A 

− Rear Seat Assembly 

P.52A-20

).

FUEL PUMP OPERATION CHECK

M1131002000818

CAUTION

To prevent damage to the M.U.T.-II/III, always turn 
the ignition switch to the "LOCK" (OFF) position 
before connecting or disconnecting the 
M.U.T.-II/III. 
1. Check the operating of the fuel pump by using the 

M.U.T.-II/III to force-drive the fuel pump.

2. If the fuel pump will not operate, check by using 

the following procedure. If normal, check the fuel 
pump drive circuit.
(1) Turn the ignition switch to the "LOCK" (OFF) 

position.

(2) Remove the rear seat assembly (Refer to 

GROUP 52A 

− Rear Seat Assembly 

P.52A-20

).

(3) Remove the protector.
(4) Disconnect the fuel pump module connector.
(5) When the fuel pump drive connector is 

attached directly to the battery, check if the 
sound of the fuel pump operation can be 
heard.

NOTE: As the fuel pump is an in-tank type, the 
fuel pump sound is hard to hear. Remove the 
fuel tank filler tube cap and check from the tank 
inlet.

(6) Check for fuel pressure by pinching the fuel 

hose with fingertips.

(7) Connect the fuel pump module connector.
(8) Install the protector and rear seat assembly 

(Refer to GROUP 52A 

− Rear Seat Assembly 

P.52A-20

).

AC207179AD

M.U.T.-II

16-pin

<When using the M.U.T.-II>

AC210056

<When using the M.U.T.-III>

AG

MB991911

16-pin

MB991827

MB991824 

AC208409

1

2

3

4

5

ON-VEHICLE SERVICE

MULTIPORT FUEL INJECTION (MPI)

13A-400

COMPONENT LOCATION

M1131002101573

Name

Symbol

Name

Symbol

A/C relay

I

Fuel pump resistor

<L.H. drive 
vehicles>

D

<R.H. 
drive 
vehicles>

H

A/C switch

X

Idle speed control servo (stepper motor) F

Air flow sensor (with intake air 
temperature sensor and barometric 
pressure sensor)

R

Ignition coil (integrated power transister) M

Crank angle sensor

A

Ignition coil relay <R.H. drive vehicles>

I

Injector

E

Detonation sensor

N

Oil feeder control solenoid valve

B

Diagnosis connector

W

Oxygen sensor (front)

K

EGR control solenoid valve

L

Oxygen sensor (rear)

T

Engine control relay

I

Power steering fluid pressure switch

J

Engine coolant temperature sensor

O

Purge control solenoid valve

G

Engine-ECU

Y

Injector resistor

<L.H. drive 
vehicles>

D

<R.H. 
drive 
vehicles>

H

Engine warming lamp (check engine 
lamp)

V

Intake camshaft position sensor

N

Exhaust camshaft position sensor

N

Throttle position sensor

F

Fan control relay

I

Transmission oil temperature sensor

Q

Fuel pressure control solenoid valve

C

Vehicle speed sensor

P

Fuel pump relay (1) and (2)

U

Waste gate solenoid valve

S

Fuel pump relay (3)

<L.H. drive 
vehicles>

D

<R.H. 
drive 
vehicles>

H

ON-VEHICLE SERVICE

MULTIPORT FUEL INJECTION (MPI)

13A-401

ENGINE CONTROL RELAY CONTINUITY 
CHECK

M1131050000754

AK304573AC

<L. H. drive vehicles>

<R. H. drive vehicles>

A

C

D

E

F

G

H

I

B

T

Y

X

W

V

U

Y

X

W

V

U

J

K

L

M

N

O

P

Q

R

S

AK304574

1

2

3

4

AB

Engine control 
relay

Relay box’s
triangle marks

Equipment side 
connector

Tester 
Connection 
Terminal

Battery 
Voltage

Normal State

2 

− 3

No Voltage

Continuity

1 

− 4

No Voltage

No continuity

Voltage 
(Connect 
positive (+) 
terminal of 
battery to 
terminal No. 2 
and negative (

−) 

terminal of 
battery to 
terminal No. 3.)

Continuity

ON-VEHICLE SERVICE

MULTIPORT FUEL INJECTION (MPI)

13A-402

FUEL PUMP RELAY CONTINUITY CHECK

M1131033000762

Fuel pump relay (1) and (2)

Fuel pump relay (3)

Tester 
Connection 
Terminal

Battery 
Voltage

Normal State

1 

− 4

No Voltage

Continuity

2 

− 3

No Voltage

No continuity

Voltage 
(Connect 
positive (+) 
terminal of 
battery to 
terminal No. 1 
and negative (

−) 

terminal of 
battery to 
terminal No. 4.)

Continuity

AK304575

1

2

3

4

AB

Junction block's 
triangle marks

Fuel pump relay (1)

Fuel pump relay (2)

Equipment 
side connector

Tester 
Connection 
Terminal

Battery 
Voltage

Normal State

3 

− 4

No Voltage

Continuity

1 

− 2

No Voltage

No continuity

Voltage 
(Connect 
positive (+) 
terminal of 
battery to 
terminal No. 2 
and negative (

−) 

terminal of 
battery to 
terminal No. 1.)

Continuity

AK304576

1

2

3

4

AB

Junction block's 
triangle marks

Fuel pump relay(3)

Equipment side connector

<L. H. drive vehicles>

<R. H. drive vehicles>

Fuel pump relay(3)