Mitsubishi Outlander (2013+). Manual - part 325

ON-VEHICLE SERVICE

MULTIPOINT FUEL INJECTION (MPI)

13A-181

11.Check to see that fuel pressure at idle does not 

drop even after the engine has been raced 
several times.

12.If any of fuel pressure measured in steps 10 and 

11 is out of specification, troubleshoot and repair 
according to the table below.

Symptom

Probable cause

Remedy

• Fuel pressure is too low.

• Fuel pressure drops after 

racing.

Clogged fuel filter

Replace the fuel filter

Fuel leaking to return side due to 
poor fuel regulator valve seating or 
settled spring.

Replace fuel pressure regulator

Low fuel pump delivery pressure

Replace fuel pump

Fuel pressure is too high.

Binding valve in fuel pressure 
regulator

Replace fuel pressure regulator

13.Stop the engine and check change of fuel 

pressure gauge reading. Normal if the reading 
does not drop within 2 minutes. If it does, observe 
the rate of drop and troubleshoot and repair 
according to the table below.

Symptom

Probable cause

Remedy

Fuel pressure drops gradually 
after engine is stopped

Leaky injector

Replace injector

Leaky fuel regulator valve seat

Replace fuel pressure regulator

Fuel pressure drops sharply 
immediately after engine is 
stopped

Check valve in fuel pump is held 
open

Replace fuel pump

14.Release residual pressure from the fuel pipe line. 

Reduce pressurized fuel lines (Refer to 

P.13A-181

).

CAUTION

Cover the hose connection with rags to prevent 
splash of fuel that could be caused by some 
residual pressure in the fuel pipe line.

15.Remove the fuel pressure gauge and special tool 

from the delivery pipe.

16.Install the fuel high-pressure hose over the 

delivery pipe.

17.Check for any fuel leaks by following the 

procedure in Step 7.

18.Disconnect the M.U.T.-III.

REDUCE PRESSURIZED FUEL LINES

M1131000902800

When removing the fuel pipes and fuel hoses, follow 
the procedure below to release fuel pressure in the 
line and prevent fuel from running out, because fuel 
pressure in the fuel line is high.
1. Remove the second seat assembly (Refer to 

GROUP 52A 

− Second Seat Assembly ) and turn 

up the floor carpet.

ACB05828

AB

Floor inspection lid (LH)

2. Remove the floor inspection lid (LH).

AC507336AC

Fuel tank pump and gauge
assembly connector

3. Disconnect the fuel tank pump and gauge 

assembly connector.

4. Crank the engine for at least two seconds.

5. If the engine does not start, turn the ignition switch 

to the "LOCK" (OFF) position.

ON-VEHICLE SERVICE

MULTIPOINT FUEL INJECTION (MPI)

13A-182

6. If the engine is started, turn the ignition switch to 

the "LOCK" (OFF) position after the engine 
stopped.

7. Connect the fuel tank pump and gauge assembly 

connector.

8. Install the floor inspection lid (LH).

9. Return the floor carpet to the original condition 

and install the second seat assembly (Refer to 
GROUP 52A 

− Second Seat Assembly ).

FUEL PUMP OPERATION CHECK

M1131002003044

1. Remove the fuel tank cap.

2. Using M.U.T.-III, forcibly drive the fuel pump 

(integrated in the fuel pump and gauge assembly) 
to check the fuel pump operation.

NOTE: The operating sound of the fuel pump is 
difficult to be heard because the pump is in-tank 
type. Therefore, remove the fuel filler cap to check 
the sound from the fuel filler port.

3. If the fuel pump does not operate, follow the 

procedure below to check the pump for operation. 
If it is normal, check the driving circuit.
(1) Turn the ignition switch to the "LOCK" (OFF) 

position.

(2) Remove the second seat assembly (refer to 

GROUP 52A 

− Second Seat Assembly ) and 

turn up the floor carpet.

ACB05828

AB

Floor inspection lid (LH)

(3) Remove the floor inspection lid (LH).

AC507336AE

Fuel pump and gauge
assembly connector

(4) Disconnect the fuel pump and gauge 

assembly connector.

AC808654

1

2

3

4

5

AC

Fuel pump and
gauge assembly
connector

(5) When the battery is connected to the fuel 

pump and gauge assembly connector 
terminals No. 4 and 5 (fuel tank pump and 
gauge assembly side), check that the pump 
operating sound can be heard. When the 
pump operating sound cannot be heard, 
replace the fuel pump (Refer to GROUP 13B

− 

On-vehicle Service 

− Fuel Pump and Gauge 

Assembly Replacement ).

NOTE: The operating sound of the fuel pump is 
difficult to be heard because the pump is 
in-tank type. Therefore, remove the fuel filler 
cap to check the sound from the fuel filler port.

(6) Install the fuel tank cap.
(7) Connect the fuel pump and gauge assembly 

connector.

(8) Install the floor inspection lid (LH).
(9) Return the floor carpet to the original condition 

and install the second seat assembly (Refer to 
GROUP 52A 

− Second Seat Assembly ).

COMPONENT LOCATION

M1131002103870

Name

Symbol

Name

Symbol

Accelerator pedal position sensor

T

ETACS-ECU (fuel pump relay)

Q

A/C compressor relay

P

Ignition coil (with the built-in power 
transistor)

C

Air flow sensor (with intake air temperature 
sensor)

G

Injector

B

ON-VEHICLE SERVICE

MULTIPOINT FUEL INJECTION (MPI)

13A-183

Crank angle sensor

N

Inlet camshaft position sensor

E

Detonation sensor

L

Inlet oil feeder control valve

I

Diagnosis connector

R

Manifold absolute pressure sensor

J

Electronic-controlled throttle valve (throttle 
position sensor and throttle valve control 
servo)

O

Oxygen sensor (front)

D

Engine control relay

P

Oxygen sensor (rear)

U

Engine coolant temperature sensor

F

Purge control solenoid valve

M

Engine-ECU

H

Starter relay

P

Engine warning lamp

S

Throttle valve control servo relay

P

Engine oil pressure switch

K

AKC00023

I

J

K

L

M

Q

T

U

R

AB

A

D

E

F

G

C

B

H

N

O

P

S

Name

Symbol

Name

Symbol

ON-VEHICLE SERVICE

MULTIPOINT FUEL INJECTION (MPI)

13A-184

ENGINE CONTROL RELAY CONTINUITY 
CHECK

M1131050002040

4

3

2

1

AKC00011

1

3

2

4

AB

AB

Engine control relay

Relay box

Relay equipment 
side connector

Tester 
connecti
on 
terminal

Battery voltage

Normal 
condition

1 

− 3

No voltage

Continuity

2 

− 4

No voltage

No 
continuity

Voltage (Connect the 
positive (+) terminal of 
battery to terminal No. 3 
and the negative (

−) 

terminal of battery to 
terminal No. 1.)

Continuity 
(2 

Ω or less)

FUEL PUMP RELAY CONTINUITY CHECK

M1131033002100

AKC00013

ETACS-ECU

AB

AKC00014

Connector "B"

Connector "B"

equipment side

connector

Connector "C"

Connector "C"

equipment side

connector

Connector "D"

Connector "D"

equipment side

connector

ETACS-ECU

Connector "A"

equipment side

connector

AB

Connector "A"

AK701305

OFF

Connector "A"

Connector "C"

ETACS-
ECU

Fuel
pump
relay

Connector "B"

Connector "D"

ON

2

11

2

1

AD