Mitsubishi Outlander GS45X. Manual - part 646

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-407

DTC P0442: Evaporative Emission Control System Leak Detected (small leak)

.

AK901208

AB

K

A

B

C

E

G

F

H

I

J

Air filter

D

Chamber

System diagram

Intake manifold

Evaporative emission
purge solenoid

Fuel tank

Evaporative
emission canister

Fuel tank differential
pressure sensor

Vent pipe

Evaporative emission
ventilation solenoid

AK704181AB

Evaporative emission canister

AK704131

Evaporative emission
purge solenoid

Exhaust gas
recirculation
(EGR) valve

AB

Connector: B-07

B-07 (B)

AK704132

AB

Evaporative emission 
ventilation solenoid

Spare tire

Connector: D-116

D-116 (B)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-408

TECHNICAL DESCRIPTION

• The ECM monitors the Evaporative Emission 

(EVAP) System pressure.

• The ECM controls the evaporative emission ven-

tilation solenoid. It closes the evaporative emis-
sion ventilation solenoid to seal the evaporative 
emission canister side of the system.

• The evaporative emission purge solenoid is 

opened to allow manifold vacuum to create low 
pressure (vacuum) in the EVAP system.

• When the EVAP system develops a vacuum of 2 

kPa (0.29 psi), the evaporative emission purge 
solenoid is closed and the fuel system vacuum is 
maintained at 2 kPa (0.29 psi).

• The ECM determines whether there is a leak in 

the EVAP system by monitoring the vacuum 
inside the fuel tank.

• The test is stopped when fuel vapor pressure 

exceeds predetermined limits.

.

DESCRIPTIONS OF MONITOR METHODS

• Measure reverting pressure after depressurizing 

by intake manifold negative pressure and detect 
malfunction if reverting pressure rises largely.

.

MONITOR EXECUTION

• Once per driving cycle.

.

MONITOR EXECUTION CONDITIONS 
(OTHER MONITOR AND SENSOR)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• Evaporative emission purge solenoid monitor

• Evaporative emission purge system monitor

• Fuel tank differential pressure sensor monitor

• Evaporative emission ventilation solenoid monitor

• Fuel level sensor monitor

• Fuel temperature sensor monitor

 Sensor (The sensors below are determined to be 

normal)

• Mass airflow sensor

• Barometric pressure sensor

• Intake air temperature sensor

• Engine coolant temperature sensor

.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-409

DTC SET CONDITIONS
Logic Flow Chart  (Monitor Sequence)

.

Check Conditions

• Amount of remaining fuel is 15 − 40 percent of 

capacity.

• Engine coolant temperature is 36°C (97°F) or 

less when the engine is started.

• Intake air temperature is 36°C (97°F) or less 

when the engine is started.

• Engine coolant temperature is higher than 60°C 

(140

°F).

• Intake air temperature is higher than −10°C 

(14

°F)

• Fuel tank temperature is less than 36°C (97°F)

• Power steering pressure switch: "OFF"

• When the evaporative emission purge solenoid 

and evaporative emission ventilation solenoid are 
closed, the pressure in the fuel tank is less than 
451 Pa (0.13 in.Hg).

• The pressure fluctuation is less than 647 Pa (0.19 

in.Hg).

AK604523

Start

Yes

No

Monitoring 
conditions?

Depressurize fuel tank pressure

Yes

Yes

No

No

Gross leak 

monitoring conditions

Shut purge line

Specified times

have passed

Malfunction

(Gross leak)

Measure reverting
pressure:     PFT  

Yes

Yes

No

No

PFT > PT

Specified times

monitored

Malfunction

End

Good

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-410

• Barometric pressure is higher than 76 kPa (22.4 

in.Hg).

• Vehicle speed is 20 km/h (12 mph) or more.

• Fuel tank differential pressure sensor output volt-

age is 1.0 

− 4.0 volts.

• At least 10 seconds have passed since the last 

monitor was complete.

Judgement Criterion

• Internal pressure of the fuel tank has changed 

more than 1,010 Pa (0.146 psi) in 20 seconds 
after the tank and vapor lines were closed.

NOTE: The monitoring time (75 

−

 125 seconds) 

depends on the fuel level and the temperature in the 
fuel tank. The next monitoring occurs at least 10 sec-
onds later.

.

Check Conditions

• Amount of remaining fuel is 40 − 80 percent of 

capacity.

• Engine coolant temperature is 36°C (97°F) or 

less when the engine is started.

• Intake air temperature is 36°C (97°F) or less 

when the engine is started.

• Engine coolant temperature is higher than 20°C 

(68

°F). 

• Intake air temperature is higher than −10°C 

(14

°F)

• Fuel tank temperature is less than 36°C (97°F).

• When the evaporative emission purge solenoid 

and evaporative emission ventilation solenoid are 
closed, the pressure in the fuel tank is less than 
324 Pa (0.09 in.Hg).

• Barometric pressure is higher than 76 kPa (22.4 

in.Hg).

• Fuel tank differential pressure sensor output volt-

age is 1.0 

− 4.0 volts.

• At least 10 seconds have passed since the last 

monitor was complete.

Judgment Criterion

• Internal pressure of the fuel tank has changed 

more than 1,922 Pa (0.279 psi) in 88 seconds 
after the tank and vapor lines were closed.

NOTE: The monitoring time (10 

−

 14 minutes) 

depends on the fuel level and the temperature in the 
fuel tank. The next monitoring occurs at least 10 sec-
onds later.

.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function 

− OBD-II Drive Cycle − 

Pattern 5 

P.13A-11

.

.

TROUBLESHOOTING HINTS (THE MOST 
LIKELY CAUSES FOR THIS CODE TO BE 
SET ARE:)

• Loose fuel cap.

• Fuel cap relief pressure is incorrect.

• Evaporative emission canister seal is leaking.

• Fuel tank, purge line or vapor line seal is leaking.

• Evaporative emission ventilation solenoid does 

not seal.

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: M.U.T.-III USB Cable

• MB991910: M.U.T.-III Main Harness A