Mitsubishi Outlander GS45X. Manual - part 884

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-469

STEP 1. Using scan tool MB991958, read the diagnostic
trouble code (DTC).

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Read the DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P0451 set?

YES : Refer to DTC P0451

− Evaporative Emission Control

System Pressure Sensor Range/Performance

P.13B-506

NO : Go to Step 2.

STEP 2. Using scan tool MB991958, check data list item 52:
Fuel Tank Differential Pressure Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Remove the fuel cap.
(3) Set scan tool MB991958 to the data reading mode for item

52, Fuel Tank Differential Pressure Sensor.

• The fuel tank differential pressures should be 1,500 and

3,500 millivolts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the fuel tank pressure between 1,500 and 3,500

millivolts?
YES : Go to Step 3.
NO : Refer to DTC P0451

− Evaporative Emission Control

System Pressure Sensor Range/Performance

P.13B-506

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-470

STEP 3. Using scan tool MB991958, check actuator test
item 10: Evaporative Emission Purge Solenoid.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool MB991958 to the actuator test mode for item

10, Evaporative emission purge solenoid.

• An operation sound should be heard and vibration

should be felt when the evaporative emission purge
solenoid is operated.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the solenoid operating properly?

YES : Go to Step 4.
NO : Replace the evaporative emission purge solenoid.

Then go to Step 6.

STEP 4. Using scan tool MB991958, check actuator test
item 15: Evaporative Emission Ventilation Solenoid.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool MB991958 to the actuator test mode for item

15, Evaporative emission ventilation solenoid.

• An operation sound should be heard and vibration

should be felt when the evaporative emission ventilation
solenoid is operated.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the solenoid operating properly?

YES : Repair or replace the vent hose and air filter. Then go

to Step 5.

NO : Replace the evaporative emission ventilation

solenoid. Then go to Step 6.

STEP 5. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to

Diagnostic Function

− OBD-II Drive Cycle − Pattern 5

P.13B-11

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0441 set?

YES : Replace the ECM. When the ECM is replaced,

with KOS>

P.42B-15

or GROUP 42C, Diagnosis

− ID

Codes Registration Judgment Table <Vehicles with
WCM>

P.42C-10

. Then go to Step 6.

NO : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

− How to

Cope with Intermittent Malfunctions

P.00-15

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-471

STEP 6. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to

Diagnostic Function

− OBD-II Drive Cycle − Pattern 5

P.13B-11

(2) Read the diagnostic trouble code.
Q: Is DTC P0441 set?

YES : Retry the troubleshooting.
NO : The inspection is complete.

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

AK901211

Air filter

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

AK900408AC

Evaporative emission purge solenoid

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-472

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

AK700418

Evaporative emission
ventilation solenoid

Spare tire

D-116 (B)

Connector: D-116

Content .. 882 883 884 885 ..