Mitsubishi Outlander GS45X. Manual — part 911

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-577

STEP 3. Replace the throttle body assembly.
(1) Replace the throttle body assembly.
(2) Carry out test drive with the drive cycle pattern. Refer to

Diagnostic Function

− OBD-II Drive Cycle − Pattern 18

P.13B-11

.

(3) Check the diagnostic trouble code (DTC).
Q: Is DTC P0506 set?

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

register the ID code. Refer to GROUP 42B, Diagnosis
− ID Codes Registration Judgment Table <Vehicles

with KOS>

P.42B-15

or GROUP 42C, Diagnosis

− ID

Codes Registration Judgment Table <Vehicles with
WCM>

P.42C-10

. Then go to Step 4.

NO : The inspection is complete.

STEP 4. 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 18

P.13B-11

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0506 set?

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

DTC P0507: Idle Control Sytem RPM Higher Than Expected

.

TECHNICAL DESCRIPTION

• The amount of air taken in during idling is regu-

lated by the opening and closing of the throttle
valve.

• The ECM checks the difference between the

actual engine speed and the target engine speed.

.

DESCRIPTIONS OF MONITOR METHODS

Difference between actual and target idle speed is
over the specified value.

.

MONITOR EXECUTION

Continuous

.

MONITOR EXECUTION CONDITIONS
(Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored

in memory for the item monitored below)

• Misfire monitor

• Exhaust gas recirculation (EGR) system monitor

• Fuel system monitor

Sensor (The sensor below is determined to be

normal)

• Mass airflow sensor

• Engine coolant temperature sensor

• Intake air temperature sensor

• Barometric pressure sensor

• Throttle position sensor

.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-578

DTC SET CONDITIONS

Logic Flow Chart

.

Check Conditions

• Under the closed loop idle speed control.

• Engine coolant temperature is higher than 41°C

(105

°F).

• Battery positive voltage is higher than 10 volts.

• Barometric pressure is higher than 76 kPa (22.4

in.Hg).

• Intake air temperature is higher than −10°C

(14

°F).

• 3 seconds have elapsed from the start of the pre-

vious monitoring.

• Target air flow rate is 0 g/sec (0 L/sec).

Judgement Criterion

• Actual idle speed has continued to be higher than

the target idle speed by 200 r/min (300 r/min*) or
more for 10 seconds.

*: Specs in parentheses are applicable if the max-

imum air temperature during the previous
operation was more than 45

°C (113°F).

.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function

− OBD-II Drive Cycle −

Pattern 18

P.13B-11

.

.

TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are:)

• Intake system vacuum leak.

• Throttle body assy failed.

• ECM failed.

Good

Malfunction

Calculated Ne

End

No

No

No

AK604345

Ne < -100 r/min

or > 200 r/min

Have 10secs passed?

Ne = (actual-Ne) - (target-Ne)

Ne: engine speed

Start

Yes

Yes

Yes

Monitoring
conditions

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-579

DIAGNOSIS

Required Special Tools:

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

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

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) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the diagnostic trouble code other than P0507 set?

YES : Refer to Diagnostic Trouble Code Chart

P.13B-50

.

NO : Go to Step 2.

STEP 2. Check the intake system vacuum leak.
Q: Are there any abnormalities?

YES : Repair it. Then go to Step 4.
NO : Go to Step 3.

STEP 3. Replace the throttle body assembly.
(1) Replace the throttle body assembly.
(2) Carry out test drive with the drive cycle pattern. Refer to

Diagnostic Function

− OBD-II Drive Cycle − Pattern 18

P.13B-11

.

(3) Check the diagnostic trouble code (DTC).
Q: Is DTC P0507 set?

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

register the ID code. Refer to GROUP 42B, Diagnosis
− ID Codes Registration Judgment Table <Vehicles

with KOS>

P.42B-15

or GROUP 42C, Diagnosis

− ID

Codes Registration Judgment Table <Vehicles with
WCM>

P.42C-10

. Then go to Step 4.

NO : The inspection is complete.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-580

STEP 4. 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 18

P.13B-11

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0507 set?

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

DTC P050B: Ignition Timing Retard Insufficient

.

TECHNICAL DESCRIPTION

• After starting the engine in the cold state, the

ECM retards the ignition timing to early activate
the catalyst by letting out the high temperature
exhaust gases.

• The ECM monitors whether the retard ignition

timing control is normal or not.

.

DESCRIPTIONS OF MONITOR METHODS

After starting the engine in the cold state, the retard

ignition timing control is abnormal, which is
caused by a decrease in idle speed and so on.

.

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)

• Not applicable

Sensor (The sensor below is determined to be

normal)

• Not applicable

.