Mitsubishi Outlander (2013+). Manual - part 294

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-57

• Short-term fuel trim is more than +19.9 % for 5 

seconds. <4B12>

Check Conditions

• Engine coolant temperature is more than 76°C.

• Under the closed loop air/fuel ratio control.

Judgement Criterion

• Long-term fuel trim is +12.5 % for 2 seconds.

or

• Short-term fuel trim is +25.0 % for 2 seconds.

FAIL-SAFE AND BACKUP FUNCTION

• None

PROBABLE CAUSES

• Failed intake air temperature sensor

• Failed air flow sensor

• Failed injector

• Air drawn in from gaps in gasket, seals, etc.

• Failed engine coolant temperature sensor

• Failed manifold absolute pressure sensor

• Failed barometric pressure sensor

• Exhaust leak

• Incorrect fuel pressure

• Use of incorrect or contaminated fuel

• Harness damage in injector circuit or loose con-

nector contact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

Q: Is any other diagnosis code than P0171 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 5: Intake air temperature sensor
b. Item 6: Engine coolant temperature sensor

c. Item 8: Manifold absolute pressure sensor

d. Item 10: Air flow sensor
e. Item BB: Barometric pressure sensor

Q: Are the check results normal?

YES  : 

Go to Step 3.

NO : 

Perform the diagnosis code classified check 
procedure for the sensor that has shown an 
abnormal data value. Inspection chart for 
diagnosis code (Refer to 

P.13A-23

).

STEP 3. Check for exhaust leaks

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Repair.

STEP 4. Check for intake system vacuum leaks.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair.

STEP 5. Check injector itself.

• No. 1 injector connector.

• No. 2 injector connector.

• No. 3 injector connector.

• No. 4 injector connector.

• Injector check (Refer to 

P.13A-188

).

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Repair or replace the connector or replace 
the injector.

STEP 6. Check harness between injector 
connector and engine-ECU connector.

a. Check and repair harness between No. 1 injector 

connector terminal and engine-ECU connector 
terminal INJ1.

b. Check and repair harness between No. 2 injector 

connector terminal and engine-ECU connector 
terminal INJ2.

c. Check and repair harness between No. 3 injector 

connector terminal and engine-ECU connector 
terminal INJ3.

d. Check and repair harness between No. 4 injector 

connector terminal and engine-ECU connector 
terminal INJ4.

• Check output line for damage.

Q: Are the check results normal?

YES : 

Go to Step 7.

NO : 

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

STEP 7. Fuel pressure measurement.

• Fuel pressure test (Refer to 

P.13A-179

).

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Repair.

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-58

STEP 8. Check fuel.

• Check for entry of foreign matter (water, diesel 

fuel, etc.) into fuel.

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Replace the fuel.

STEP 9. Replace the injector.

• After replacing the injector, reconfirm whether the 

diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace the engine-ECU.

NO : 

Check end.

Code No. P0172: Abnormal Fuel System (rich)

OPERATION

• Check code No. P0261: No. 1 injector circuit low 

input (Refer to 

P.13A-62

).

• Check code No. P0262: No. 1 injector circuit high 

input (Refer to 

P.13A-63

).

• Check code No. P0264: No. 2 injector circuit low 

input (Refer to 

P.13A-64

).

• Check code No. P0265: No. 2 injector circuit high 

input (Refer to 

P.13A-65

).

• Check code No. P0267: No. 3 injector circuit low 

input (Refer to 

P.13A-66

).

• Check code No. P0268: No. 3 injector circuit high 

input (Refer to 

P.13A-67

).

• Check code No. P0270: No. 4 injector circuit low 

input (Refer to 

P.13A-68

).

• Check code No. P0271: No. 4 injector circuit high 

input (Refer to 

P.13A-69

).

FUNCTION

• If the fuel system goes out of order, the fuel cor-

rection value will become larger.

• The engine-ECU checks whether the fuel trim 

value is within a specified range.

TROUBLE JUDGMENT

Check Conditions

• Under the closed loop air/fuel ratio control.

• Engine coolant temperature is more than 76°C.

Judgement Criterion

• Long-term fuel trim is less than −12.5 % for 5 sec-

onds.

or

• Short-term fuel trim is less than −10.2 % for 5 

seconds.

Check Conditions

• Engine coolant temperature is more than 76°C.

• Under the closed loop air/fuel ratio control.

Judgement Criterion

• Long-term fuel trim is −12.5 % for 2 seconds.

or

• Short-term fuel trim is −25.0 % for 2 seconds.

FAIL-SAFE AND BACKUP FUNCTION

• None

PROBABLE CAUSES

• Failed intake air temperature sensor

• Failed air flow sensor

• Failed injector

• Failed engine coolant temperature sensor

• Failed manifold absolute pressure sensor

• Failed barometric pressure sensor

• Incorrect fuel pressure

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

Q: Is any other diagnosis code than P0172 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 5: Intake air temperature sensor
b. Item 6: Engine coolant temperature sensor

c. Item 8: Manifold absolute pressure sensor

d. Item 10: Air flow sensor
e. Item BB: Barometric pressure sensor

Q: Are the check results normal?

YES  : 

Go to Step 3.

NO : 

Perform the diagnosis code classified check 
procedure for the sensor that has shown an 
abnormal data value. Inspection chart for 
diagnosis code (Refer to 

P.13A-23

).

STEP 3. Check injector itself.

• Injector check (Refer to 

P.13A-188

).

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Replace the injector.

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-59

STEP 4. Fuel pressure measurement.

• Fuel pressure test (Refer to 

P.13A-179

).

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair.

STEP 5. Replace the injector.

• After replacing the injector, reconfirm whether the 

diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace the engine-ECU.

NO : 

Check end.

Code No. P0221: Trustful Check Throttle Position Sensor (sub)

FUNCTION

• Compare the actual measurement of volumetric 

efficiency by an air flow sensor signal with volu-
metric efficiency estimated from a throttle position 
sensor (sub) signal.

TROUBLE JUDGMENT

Check Conditions

• Difference between the actual volumetric effi-

ciency and the volumetric efficiency estimated by 
the throttle position sensor (sub) is more than 0 
%. Or, the volumetric efficiency is less than 60 %.

• Engine speed is more than 750 r/min and is less 

than 3,000 r/min. Or, the throttle position sensor 
(sub) output voltage is less than 3 V.

Judgement Criterion

• Difference between the actual volumetric effi-

ciency and the volumetric efficiency estimated by 
the throttle position sensor (sub) is more than 33 
%. 

FAIL-SAFE AND BACKUP FUNCTION

• Throttle opening degree is restricted.

• Throttle opening degree position is in default 

position if throttle position sensor (main) fails.

PROBABLE CAUSES

• Failed throttle position sensor (sub)

• Harness damage in throttle position sensor (sub) 

circuit or loose connector contact

• Failed intake air system

• 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 P0221 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 15: Throttle position sensor (sub)

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Check throttle position sensor (sub) system. 
Check code No. P0222: throttle position 
sensor (sub) circuit low input (Refer to 

P.13A-60

). Check code No. P0223: throttle 

position sensor (sub) circuit high input 
(Refer to 

P.13A-61

).

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 
).

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-60

Code No. P0222: Throttle Position Sensor (sub) Circuit Low Input

OPERATION

• A power voltage of 5 V is applied to the elec-

tronic-controlled throttle valve connector terminal 
from the engine-ECU connector terminal TPS5.

• The power voltage is earthed to the engine-ECU 

connector terminal TPSE from the electronic-con-
trolled throttle valve connector terminal.

• The sensor signal is inputted to the engine-ECU 

connector terminal TPSS from the electronic-con-
trolled throttle valve output terminal.

FUNCTION

• The throttle position sensor converts the throttle 

valve position into voltage and inputs it into the 
engine-ECU.

• The engine-ECU controls the throttle valve open-

ing angle.

TROUBLE JUDGMENT

Check Condition

• Ignition switch is "ON" position.

Judgement Criterion

• Throttle position sensor (sub) output voltage is 

less than 0.2 V.

FAIL-SAFE AND BACKUP FUNCTION

• Throttle opening degree is restricted.

• Throttle opening degree position is in default 

position if throttle position sensor (main) fails.

PROBABLE CAUSES

• Failed throttle position sensor (sub)

• Open/short circuit or harness damage in throttle 

position sensor (sub) 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 15: Throttle position sensor (sub)

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 
electronic-controlled throttle valve connector.

• Disconnect connector, and measure at harness 

side.

• Ignition switch: "ON" 

• Voltage between terminal engine-ECU TPS5 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.

STEP 3. Check harness between 
electronic-controlled throttle valve connector 
terminal and engine-ECU connector terminal 
TPS5.

• Check power supply line for open/short circuit.

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 15: Throttle position sensor (sub)

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 : 

Replace the engine-ECU.

STEP 5. Check harness between 
electronic-controlled throttle valve connector 
terminal and engine-ECU connector terminal 
TPS5.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

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