Mitsubishi Outlander GS45X. Manual - part 772

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-21

CONFIRMATION METHOD

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. Select "System select."
4. Choose "from 2006 MY" under "MODEL YEAR".
5. Check that "Vehicle Information" contents are correct.
6. Choose "MFI".
7. Select "Special Function" from MFI Screen.
8. Select "Provisional DTCs" from Special Function Screen.

PERMANENT DTC

The permanent DTC(PDTC) is stored in the EEPROM of the 
engine control module (ECM) as the permanent status, which 
checks that the malfunction of the emission related compo-
nents/ the system has not been repaired yet. When detecting 
the malfunction necessary to illuminate the malfunction indica-
tor lamp (SERVICE ENGINE SOON or Check Engine Lamp), 
the ECM illuminates the MIL and stores the appropriate DTC as 
the permanent DTC in the EEPROM concurrently. The usual 
DTC is stored in the EEPROM aside from this. The ECM can 
store up to 6 PDTCs. The ECM, therefore, cannot store the 7th 
and subsequent PDTCs. If the temporary malfunction causes 
the malfunction indicator lamp to be illuminated and then the 
reinstatement during the subsequent driving causes it to be 
extinguished, the PDTC is erased. Also if the ECM checks that 
the DTC malfunction is fixed during the driving after the DTC 
repair is completed, the PDTC is erased. The permanent DTC, 
however, is not erased by disconnecting the battery terminal or 
erasing with the scan tool (M.U.T-III). The permanent DTC can 
be erased if all readiness statuses are erased or not completed 
at the time of reprogramming the ECM. If must be erased while 
the vehicle is repaired, the PDTC can be erased by the proce-
dures shown below. If must be erased because of the failure to 
pass the Inspection and Maintenance (I/M) test, the permanent 
DTC can also be erased by the following procedure:

.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-22

PROCEDURES FOR ERASING PERMANENT DTC

1. Check that the DTC is not stored. If the DTC is stored, 

perform the DTC troubleshooting, then repair the DTC.
NOTE: The order of step 2 and 3 can be exchanged.

2. Drive the vehicle at least once under the conditions 

satisfying all the following requirements:

• The total driving (engine running) time must be more than 

10 consecutive minutes. 

• More than 30 seconds of idling must be included in the driv-

ing

• More than 5 consecutive minutes of driving at more than 40 

km/h (25 mph) must be included in the driving.    

3. Drive the vehicle at least two times in the drive cycle pattern 

suitable for the permanent DTC. (Refer to OBD-II DRIVE 
CYCLE for the drive cycle pattern.) If the DTC does not have 
the drive cycle pattern, start and stop the engine. Wait 15 
seconds or more to start again after the stop. Repeat at least 
2 times.

4. Restart and stop the engine.
5. Check that the permanent DTC is erased. If the permanent 

DTC is not erased, check the DTC or the provisional DTC. If 
the malfunction code is stored, repair the DTC. Try to erase 
the permanent DTC again (from Step 1 to 5). If the 
malfunction code is not stored, the drive cycle pattern (Step 
3) monitoring the malfunction can possibly be insufficient. 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-23

MODE 6 REFERENCE TABLE

The engine control module (ECM) monitors the condition of 
emission control system. 
By selecting MODE 6 using scan tool, Test Result and Limit 
Value (minimum) *1 or (maximum) *2 about the main items of 
emission control system which ECM monitors can be con-
firmed. The value at the last monitoring is output by ECM as a 
test result.

ON-BOARD 
DIAGNOSTIC 
MONITOR ID

STANDARDIZED / 
MANUFACTURER 
DEFIND TEST ID

MONITORING ITEM

SIMPLE TECHNICAL DESCRIPTION CONVERSION 

COEFFICIENT IN USING 
GENERAL SCAN TOOL

01

81

Oxygen Sensor Monitor 
Bank 1 

− Sensor 1

Rich/Lean Switching 
frequency

ECM monitors the 
deteriorated condition of the 
right bank heated oxygen 
sensor (front) by checking 
the rich/lean switching 
frequency of the right bank 
heated oxygen sensor 
(front).

× 1 count

02

08

Oxygen Sensor Monitor 
Bank 1 

− Sensor 2

Maximum Sensor Voltage 
for Test Cycle

ECM checks the output 
voltage of the right bank 
heated oxygen sensor 
(rear) in order to monitor 
whether the right bank 
heated oxygen sensor 
(rear) outputs the rich 
signal.

× 0.122 mV

82

Oxygen Sensor Monitor 
Bank 1 

− Sensor 2

Output Voltage change

ECM checks the output 
voltage of the right bank 
heated oxygen sensor 
(rear) in order to monitor 
whether the right bank 
heated oxygen sensor 
(rear) output is stuck.

× 0.122 mV

05

Oxygen Sensor Monitor 
Bank 1 

− Sensor 2

Rich To Lean Sensor Switch 
Time

ECM checks the rich to lean 
switching time of the right 
bank heated oxygen sensor 
(rear) in order to monitor 
the response of the right 
bank heated oxygen sensor 
(rear).

× 1 msec

88

Oxygen Sensor Monitor 
Bank 1 

− Sensor 2

Output Voltage drop slope

ECM checks the output 
voltage drop slope of the 
right bank heated oxygen 
sensor (rear) in order to 
monitor the response of the 
right bank heated oxygen 
sensor (rear).

× 1 msec

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-24

05

81

Oxygen Sensor Monitor 
Bank 2 

− Sensor 1

Rich/Lean Switching 
frequency

ECM monitors the 
deteriorated condition of the 
left bank heated oxygen 
sensor (front) by checking 
the rich/lean switching 
frequency of the left bank 
heated oxygen sensor 
(front).

× 1 count

06

08

Oxygen Sensor Monitor 
Bank 2 

− Sensor 2

Maximum Sensor Voltage 
for Test Cycle

ECM checks the output 
voltage of the left bank 
heated oxygen sensor 
(rear) in order to monitor 
whether the left bank 
heated oxygen sensor 
(rear) outputs the rich 
signal.

× 0.122 mV

82

Oxygen Sensor Monitor 
Bank 2 

− Sensor 2

Output Voltage change

ECM checks the output 
voltage of the left bank 
heated oxygen sensor 
(rear) in order to monitor 
whether the left bank 
heated oxygen sensor 
(rear) output is stuck.

× 0.122 mV

05

Oxygen Sensor Monitor 
Bank 2 

− Sensor 2

Rich To Lean Sensor Switch 
Time

ECM checks the rich to lean 
switching time of the left 
bank heated oxygen sensor 
(rear) in order to monitor 
the response of the left 
bank heated oxygen sensor 
(rear).

× 1 msec

88

Oxygen Sensor Monitor 
Bank 2 

− Sensor 2

Output Voltage drop slope

ECM checks the output 
voltage drop slope of the 
left bank heated oxygen 
sensor (rear) in order to 
monitor the response of the 
left bank heated oxygen 
sensor (rear).

× 1 msec

21

83

Catalyst Monitor Bank 1
Frequency ratio between 
Front- and Rear-Oxygen 
Sensors

ECM monitors the 
deterioration of catalyst at 
right bank side by the 
output frequency ratio 
between right bank heated 
oxygen sensor (front) and 
right bank heated oxygen 
sensor (rear).

× 0.0039

ON-BOARD 
DIAGNOSTIC 
MONITOR ID

STANDARDIZED / 
MANUFACTURER 
DEFIND TEST ID

MONITORING ITEM

SIMPLE TECHNICAL DESCRIPTION CONVERSION 

COEFFICIENT IN USING 
GENERAL SCAN TOOL