Mitsubishi Outlander (2013+). Manual - part 288

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-33

TROUBLE JUDGMENT

Check Condition

• Plausibility error of the throttle position sensor 

(main) is detected.

• Plausibility error of the throttle position sensor 

(sub) is detected.

Judgement Criterion

• Difference between the volumetric efficiency esti-

mated by the throttle position sensor (main) and 
the volumetric efficiency estimated by the throttle 
position sensor (sub) is less than 8.8 %.

FAIL-SAFE AND BACKUP FUNCTION

• Fuel control is carried out using throttle opening 

degree and engine speed in accordance with pre-
set map.

PROBABLE CAUSES

• Failed air flow sensor

• Harness damage in air flow sensor circuit or 

loose connector contact

• There is some foreign matter around air flow sen-

sor

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

Q: Is any other diagnosis code than P0068 set?

YES : 

Inspection chart for diagnosis code (Refer 

to 

P.13A-23

).

NO : 

Go to Step 2.

STEP 2. M.U.T.-III data list

• Data list reference table (Refer to 

P.13A-155

).

a. Item 10: Air flow sensor

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Check air flow sensor system. Check code 
No. P0102: air flow sensor circuit low input 
(Refer to 

P.13A-33

). Check code No. 

P0103: air flow sensor circuit high input 
(Refer to 

P.13A-35

).

STEP 3. Check air intake from inlet hose and inlet 
manifold.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair.

STEP 4. Check air flow sensor.

• Check that there is not foreign matter around air 

flow sensor.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair.

STEP 5. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Q: Is diagnosis code set?

YES : 

Replace the engine-ECU.

NO : 

Intermittent malfunction (Refer to GROUP 
00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 
).

Code No. P0102: Air Flow Sensor Circuit Low Input

OPERATION

• Power is supplied by the engine control relay 

connector terminal to the air flow sensor connec-
tor terminal.

• Power is supplied by the engine-ECU connector 

terminal AFS5 to the air flow sensor connector 
terminal, and the air flow sensor connector termi-
nal is earthed through the engine-ECU connector 
terminal AFSE.

• The air flow sensor connector terminal outputs a 

sensor signal, which is input into the engine-ECU 
connector terminal AFS.

FUNCTION

• The air flow sensor outputs current that varies in 

accordance with the intake air volume.

• The engine-ECU uses the amperage output by 

the air flow sensor and the engine speed signal in 
order to determine the basic injection duration of 
the injector.

TROUBLE JUDGMENT

Check Condition

• More than 3 seconds have passed since the igni-

tion switch was turned to "ON" position.

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-34

Judgement Criterion

• Air flow sensor output voltage is less than 0.2 V 

(corresponding to an air flow rate of 0 g/sec or 
less) for 2 seconds.

FAIL-SAFE AND BACKUP FUNCTION

• Fuel control is carried out using throttle opening 

degree and engine speed in accordance with pre-
set map.

PROBABLE CAUSES

• Failed air flow sensor

• Open/short circuit or harness damage in air flow 

sensor circuit or loose connector contact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

• Data list reference table (Refer to 

P.13A-155

).

a. Item 10: Air flow sensor

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 
).

NO : 

Go to Step 2.

STEP 2. Perform voltage measurement at air flow 
sensor connector.

• Disconnect connector, and measure at harness 

side.

• Ignition switch: "ON"

• Voltage between terminal power supply line and 

body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair or replace the connector, or check 

and repair harness between engine control 
relay connector terminal and air flow sensor 
connector terminal.

• Check power supply line for 

open/short circuit.

STEP 3. Perform voltage measurement at air flow 
sensor connector.

• Use special tool test harness (MB991709) to con-

nect connector, and measure at pick-up harness.

• Ignition switch: "ON"

• Voltage between terminal engine-ECU AFS5 line 

and body earth.

OK: 4.9 

− 5.1 V

Q: Is the check result normal?

YES : 

Go to Step 5. 

NO : 

Go to Step 4. 

STEP 4. Perform voltage measurement at 
engine-ECU connector.

• Measure engine-ECU connector terminal voltage.

• Ignition switch: "ON"

• Voltage between terminal AFS5 and body earth.

OK: 4.9 

− 5.1 V

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair or replace the connector, or check 

and repair harness between engine-ECU 
connector terminal AFS5 and air flow 
sensor connector terminal No. 2.

• Check power supply line for 

open/short circuit.

STEP 5. Check harness between air flow sensor 
connector terminal and engine-ECU connector 
terminal AFS.

• Check output line for open/short circuit and dam-

age.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair or replace the connector, or repair 
the damaged harness wire.

STEP 6. Check harness between engine control 
relay connector terminal and air flow sensor 
connector terminal.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Repair or replace the connector, or repair 
the damaged harness wire.

STEP 7. M.U.T.-III data list

• Data list reference table (Refer to 

P.13A-155

).

a. Item 10: Air flow sensor

Q: Is the check result normal?

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-35

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 
).

NO : 

Go to Step 8.

STEP 8. Replace the air flow sensor

• After replacing the air flow sensor, reconfirm 

whether the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace the engine-ECU.

NO : 

Check end.

Code No. P0103: Air Flow Sensor Circuit High Input

OPERATION

• Power is supplied by the engine control relay 

connector terminal to the air flow sensor connec-
tor terminal.

• Power is supplied by the engine-ECU connector 

terminal AFS5 to the air flow sensor connector 
terminal, and the air flow sensor connector termi-
nal is earthed through the engine-ECU connector 
terminal AFSE.

• The air flow sensor connector terminal outputs a 

sensor signal, which is input into the engine-ECU 
connector terminal AFS.

FUNCTION

• The air flow sensor outputs current that varies in 

accordance with the intake air volume.

• The engine-ECU uses the amperage output by 

the air flow sensor and the engine speed signal in 
order to determine the basic injection duration of 
the injector.

TROUBLE JUDGMENT

Check Condition

• More than 3 seconds have passed since the igni-

tion switch was turned to "ON" position.

Judgement Criterion

• Air flow sensor output voltage is more than 4.9 V 

(corresponding to an air flow rate of 300 g/sec or 
more) for 2 seconds.

FAIL-SAFE AND BACKUP FUNCTION

• Fuel control is carried out using throttle opening 

degree and engine speed in accordance with pre-
set map.

PROBABLE CAUSES

• Failed air flow sensor

• Open circuit or harness damage in air flow sensor 

circuit or loose connector contact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

• Data list reference table (Refer to 

P.13A-155

).

a. Item 10: Air flow sensor

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 
).

NO : 

Go to Step 2.

STEP 2. Perform resistance measurement at air 
flow sensor connector.

• Disconnect connector, and measure at harness 

side.

• Resistance between terminal engine-ECU AFSE 

line and body earth.

OK: Continuity (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 3.

STEP 3. Check harness between air flow sensor 
connector terminal and engine-ECU connector 
terminal AFSE.

• Check earthing line for open circuit and damage.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair or replace the connector, or repair 
the damaged harness wire.

STEP 4. M.U.T.-III data list

• Data list reference table (Refer to 

P.13A-155

).

a. Item 10: Air flow sensor

Q: Is the check result normal?

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-36

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 
).

NO : 

Replace the engine-ECU.

STEP 5. M.U.T.-III data list

• Data list reference table (Refer to 

P.13A-155

).

a. Item 10: Air flow sensor

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 
).

NO : 

Go to Step 6.

STEP 6. Replace the air flow sensor

• After replacing the air flow sensor, reconfirm 

whether the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace the engine-ECU.

NO : 

Check end.

Code No. P0107: Manifold Absolute Pressure Sensor Circuit Low Input

OPERATION

• A power voltage of 5 V is applied to the manifold 

absolute pressure sensor power terminal from 
the engine-ECU connector terminal MAP5 and 
earthed to the engine-ECU connector terminal 
MAPE from the manifold absolute pressure sen-
sor connector terminal.

• The sensor signal is inputted to the engine-ECU 

connector terminal MAP from the manifold abso-
lute pressure sensor output terminal.

FUNCTION

• The manifold absolute pressure sensor detects a 

change in inlet manifold pressure and inputs the 
signal to the engine-ECU.

• In response to the signal, the engine-ECU cor-

rects the fuel injection amount, etc.

TROUBLE JUDGMENT

Check Conditions

• More than 8 minutes have passed since the 

engine starting sequence was completed, when 
the engine coolant temperature at engine start is 
less than 0

°C.

• Volumetric efficiency is more than 20 %.

Judgement Criterion

• Manifold absolute pressure sensor output voltage 

is less than 0.2 V (corresponding to a manifold 
absolute pressure of 5 kPa or less) for 2 seconds.

FAIL-SAFE AND BACKUP FUNCTION

• Control as if the inlet manifold vacuum pressure 

is 101 kPa.

PROBABLE CAUSES

• Failed manifold absolute pressure sensor

• Open/short circuit or harness damage in manifold 

absolute pressure sensor circuit or loose connec-
tor contact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

• Data list reference table (Refer to 

P.13A-155

).

a. Item 8: Manifold absolute pressure sensor

Q: Is the check result normal?

YES : 

Intermittent malfunction (Refer to GROUP 

00 

− How to Use 

Troubleshooting/Inspection Service Points 

− 

How to Cope with Intermittent Malfunctions 
).

NO : 

Go to Step 2.

STEP 2. Perform voltage measurement at 
manifold absolute pressure sensor connector.

• Disconnect connector, and measure at harness 

side.

• Ignition switch: "ON"

• Voltage between terminal engine-ECU MAP5 line 

and body earth.

OK: 4.9 

− 5.1 V

Q: Is the check result normal?

YES : 

Go to Step 5. 

NO : 

Go to Step 3.