Mitsubishi Outlander (2013+). Manual - part 307

 

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Mitsubishi Outlander (2013+). Manual - part 307

 

 

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-109

Judgement Criterion

• Voltage obtained with the formula given below is 

more than 0.4 V: accelerator pedal position sen-
sor (main) voltage 

− accelerator pedal position 

sensor (sub) voltage

NOTE: The accelerator pedal position sensor volt-
age used for the judgment is converted into the 
accelerator pedal position sensor voltage for the 
internal processing by the engine-ECU.

FAIL-SAFE AND BACKUP FUNCTION

• Throttle opening degree is restricted.

• Throttle opening degree position is in default 

position if accelerator pedal position sensor (sub) 
fails.

PROBABLE CAUSES

• Failed accelerator pedal position sensor

• Harness damage in accelerator pedal position 

sensor circuit or loose connector contact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Perform resistance measurement at 
accelerator pedal position sensor connector.

• Disconnect connector, and measure at harness 

side.

• Resistance between terminal engine-ECU APSE 

line and body earth.

OK: Continuity (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Go to Step 2.

STEP 2. Check harness between accelerator 
pedal position sensor connector terminal and 
engine-ECU connector terminal APSE.

• Check earthing line for damage.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

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

STEP 3. 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 
).

STEP 4. Perform resistance measurement at 
accelerator pedal position sensor connector.

• Disconnect connector, and measure at harness 

side.

• Resistance between terminal engine-ECU EV 

line and body earth.

OK: Continuity (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Go to Step 5.

STEP 5. Check harness between accelerator 
pedal position sensor connector terminal and 
engine-ECU connector terminal EV.

• Check earthing line for damage.

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

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

STEP 6. Check harness between accelerator 
pedal position sensor connector terminal and 
engine-ECU connector terminal APS5.

• 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. Check harness between accelerator 
pedal position sensor connector terminal and 
engine-ECU connector terminal 5VV.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

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

STEP 8. Check harness between accelerator 
pedal position sensor connector terminal and 
engine-ECU connector terminal APSM.

• Check output line for damage.

Q: Is the check result normal?

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-110

YES : 

Go to Step 9.

NO : 

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

STEP 9. Check harness between accelerator 
pedal position sensor connector terminal and 
engine-ECU connector terminal APSS.

• Check output line for damage.

Q: Is the check result normal?

YES : 

Go to Step 10.

NO : 

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

STEP 10. Replace the accelerator pedal assembly

• After replacing the accelerator pedal assembly, 

reconfirm whether the diagnosis code is set.

Q: Is the diagnosis code set?

YES : 

Replace the engine-ECU.

NO : 

Check end.

Code No. P2228: Barometric Pressure Sensor Circuit Low Input

FUNCTION

• The barometric pressure sensor converts the bar-

ometric pressure into a voltage signal 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 2 seconds have passed since the 

engine starting sequence was completed.

• Battery positive voltage is more than 8 V.

Judgement Criterion

• Barometric pressure sensor output signal is less 

than 49 kPa (approximately 4,600m above sea 
level) for 10 seconds.

FAIL-SAFE AND BACKUP FUNCTION

• Control as if the barometric pressure is 101 kPa.

PROBABLE CAUSE

• Failed barometric pressure sensor

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Q: Is the 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. P2229: Barometric Pressure Sensor Circuit High Input

FUNCTION

• The barometric pressure sensor converts the bar-

ometric pressure into a voltage signal 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 2 seconds have passed since the 

engine starting sequence was completed.

• Battery positive voltage is more than 8 V.

Judgement Criterion

• Barometric pressure sensor output signal is more 

than 113 kPa (approximately 1,200 m below sea 
level) for 10 seconds.

FAIL-SAFE AND BACKUP FUNCTION

• Control as if the barometric pressure is 101 kPa.

PROBABLE CAUSE

• Failed barometric pressure sensor

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-111

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Q: Is the 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. P2252: Oxygen Sensor Offset Circuit Low Voltage

OPERATION

• Check code No. P0131: oxygen sensor (front) cir-

cuit low voltage (Refer to 

P.13A-49

).

• Check code No. P0137: oxygen sensor (rear) cir-

cuit low voltage (Refer to 

P.13A-54

).

FUNCTION

• The engine-ECU watches and checks whether 

the offset voltage of the oxygen sensor is normal 
or not.

TROUBLE JUDGMENT

Check Condition

• More than 2 seconds have passed since the 

engine starting sequence was completed.

Judgement Criterion

• Oxygen sensor offset voltage is less than 0.4 V 

for 2 seconds.

FAIL-SAFE AND BACKUP FUNCTION

• None

PROBABLE CAUSES

• Failed oxygen sensor (front)

• Failed oxygen sensor (rear)

• Short circuit in oxygen sensor (front) circuit or 

loose connector contact

• Short circuit in oxygen sensor (rear) circuit or 

loose connector contact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check oxygen sensor (front) itself.

• Oxygen sensor (front) connector check.

• Oxygen sensor check (Refer to 

P.13A-186

).

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair or replace the connector, or replace 
the oxygen sensor.

STEP 2. Check oxygen sensor (rear) itself.

• Oxygen sensor (rear) connector check.

• Oxygen sensor check (Refer to 

P.13A-186

).

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair or replace the connector, or replace 
the oxygen sensor (rear).

STEP 3. Perform voltage measurement at oxygen 
sensor (front) connector.

• Disconnect engine-ECU connector, and connect 

special tool power plant ECU check harness 
(MB992110) to measure at connector for inspec-
tion.

• Ignition switch: "ON"

• Voltage between terminal engine-ECU OFLE line 

and body earth.

OK: 0.4 

− 0.6 V

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Go to Step 4.

STEP 4. Check harness between oxygen sensor 
(front) connector terminal and engine-ECU 
connector terminal OFLE.

• Check earthing line for short circuit.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

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

STEP 5. M.U.T.-III diagnosis code

• Reconfirmation of diagnosis code.

Q: Is the 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-112

STEP 6. Perform voltage measurement at oxygen 
sensor (rear) connector.

• Disconnect engine-ECU connector, and connect 

special tool power plant ECU check harness 
(MB992110) to measure at connector for inspec-
tion.

• Ignition switch: "ON"

• Voltage between terminal engine-ECU ORLE line 

and body earth.

OK: 0.4 

− 0.6 V

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 7.

STEP 7. Check harness between oxygen sensor 
(rear) connector terminal and engine-ECU 
connector terminal ORLE.

• Check earthing line for short circuit.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

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

Code No. P2253: Oxygen Sensor Offset Circuit High Voltage

OPERATION

• Check code No. P0131: oxygen sensor (front) cir-

cuit low voltage (Refer to 

P.13A-49

).

• Check code No. P0137: oxygen sensor (rear) cir-

cuit low voltage (Refer to 

P.13A-54

).

FUNCTION

• The engine-ECU watches and checks whether 

the offset voltage of the oxygen sensor is normal 
or not.

TROUBLE JUDGMENT

Check Condition

• More than 2 seconds have passed since the 

engine starting sequence was completed.

Judgement Criterion

• Oxygen sensor offset voltage is more than 0.6 V 

for 2 seconds.

FAIL-SAFE AND BACKUP FUNCTION

• Does not control air-fuel ratio closed loop.

PROBABLE CAUSES

• Failed oxygen sensor (front)

• Failed oxygen sensor (rear)

• Short circuit in oxygen sensor (front) circuit or 

loose connector contact

• Short circuit in oxygen sensor (rear) circuit or 

loose connector contact

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check oxygen sensor (front) itself.

• Oxygen sensor (front) connector check.

• Oxygen sensor check (Refer to 

P.13A-186

).

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair or replace the connector, or replace 
the oxygen sensor (front).

STEP 2. Check oxygen sensor (rear) itself.

• Oxygen sensor (rear) connector check.

• Oxygen sensor check (Refer to 

P.13A-186

).

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair or replace the connector, or replace 
the oxygen sensor (rear).

STEP 3. Perform voltage measurement at 
engine-ECU connector.

• Disconnect engine-ECU connector, and connect 

special tool power plant ECU check harness 
(MB992110) to measure at connector for inspec-
tion.

• Ignition switch: "ON"

• Voltage between terminal OFLE and body earth.

OK: 0.4 

− 0.6 V

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Go to Step 4.

STEP 4. Check harness between oxygen sensor 
(front) connector terminal and engine-ECU 
connector terminal OFLE.

• Check earthing line for short circuit.

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

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

 

 

 

 

 

 

 

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