Mitsubishi Outlander (2013+). Manual - part 305

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-101

FUNCTION

• Engine-ECU varies the direction and the amper-

age of the current that is applied to the throttle 
valve control servo in order to control the opening 
of the throttle valve.

TROUBLE JUDGMENT

Check Conditions

• Battery positive voltage is more than 8.3 V.

• Difference between the throttle position sensor 

(main) output voltage and the target throttle posi-
tion sensor (main) voltage is more than 0.1 V.

• Difference between the throttle position sensor 

(sub) output voltage and the target throttle posi-
tion sensor (sub) voltage is more than 0.1 V.

• The drive duty of the throttle valve control servo 

is more than 100 %.

• Except while engine is being cranked.

or

• Battery positive voltage is more than 8.3 V.

• Difference between the target throttle position 

sensor (main) voltage and the throttle position 
sensor (main) output voltage is more than 0.1 V.

• Difference between the target throttle position 

sensor (sub) voltage and the throttle position sen-
sor (sub) output voltage is more than 0.1 V.

• The drive duty of the throttle valve control servo 

is more than 100 %.

• Except while engine is being cranked.

Judgement Criterion

• Difference between the throttle position sensor 

(main) output voltage and the learning value of 
the middle-opened degree is less than 0.2 V.

or

• Difference between the throttle position sensor 

(sub) output voltage and the learning value of the 
middle-opened degree is less than 0.2 V.

FAIL-SAFE AND BACKUP FUNCTION

• Throttle opening degree position is in default 

position.

PROBABLE CAUSES

• Failed throttle valve control servo.

• Open circuit or harness damage in throttle valve 

control servo circuit or lose connector contact.

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check throttle valve control servo itself.

• Electronic-controlled throttle valve control check.

• Throttle valve control servo check (Refer to 

P.13A-189

).

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair or replace the connector, or replace 
the throttle body assembly.

STEP 2. Perform resistance measurement at 
engine-ECU connector.

• Disconnect connector, and measure at harness 

side.

• Resistance between terminal RSG, RSH and 

body earth.

OK: Continuity (2 

Ω or less)

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair or replace the connector, or check 

and repair harness between engine-ECU 
connector terminal RSG, RSH and body 
earth.

• Check earthing line for open circuit 

and damage.

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

• Check output 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. Check harness between 
electronic-controlled throttle valve connector 
terminal and engine-ECU connector terminal 
ETV-.

• Check signal line for open circuit and damage.

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 diagnosis code set? 

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-102

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. P2101: Throttle Valve Control Servo Magneto Malfunction

OPERATION

• Controls the current that is applied from the 

engine-ECU connector terminals ETV+, ETV- to 
the electronic-controlled throttle valve connector 
terminals.

FUNCTION

• Engine-ECU check whether the throttle valve 

control servo magneto failed.

TROUBLE JUDGMENT

Check Condition

• Battery positive voltage is more than 8.3 V.

Judgement Criterion

• The coil current of the throttle valve control servo 

is more than 8 A.

FAIL-SAFE AND BACKUP FUNCTION

• Throttle opening degree position is in default 

position.

PROBABLE CAUSES

• Failed throttle valve control servo.

• Short circuit or harness damage in throttle valve 

control servo circuit or lose connector contact.

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check throttle valve control servo itself.

• Electronic-controlled throttle valve control check.

• Throttle valve control servo check (Refer to 

P.13A-189

).

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Repair or replace the connector, or replace 
the throttle body assembly.

STEP 2. Check harness between 
electronic-controlled throttle valve connector 
terminal and engine-ECU connector terminal 
ETV+.

• Check output line for short circuit and 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. Check harness between 
electronic-controlled throttle valve connector 
terminal and engine-ECU connector terminal 
ETV-.

• Check signal line for short 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 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. P2122: Accelerator Pedal Position Sensor (main) Circuit Low Input

OPERATION

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

tor pedal position sensor connector terminal from 

the engine-ECU connector terminal APS5.

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-103

• The power voltage is earthed to the engine-ECU 

connector terminal APSE from the accelerator 
pedal position sensor connector terminal.

• The sensor signal is inputted to the engine-ECU 

connector terminal APSM from the accelerator 
pedal position sensor output terminal.

FUNCTION

• The accelerator pedal position sensor (main) out-

puts voltage which corresponds to the accelera-
tor pedal depression.

• The engine-ECU checks whether the voltage is 

within a specified range.

TROUBLE JUDGMENT

Check Condition

• Ignition switch is "ON" position.

Judgement Criterion

• Accelerator pedal position sensor (main) 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 accelerator pedal position sensor (sub) 
fails.

PROBABLE CAUSES

• Failed accelerator pedal position sensor

• Open/short circuit or harness damage in acceler-

ator pedal position sensor circuit or loose con-
nector 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 11: Accelerator pedal position sensor 

(main)

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 
accelerator pedal position sensor connector.

• Disconnect connector, and measure at harness 

side.

• Ignition switch: "ON" 

• Voltage between terminal engine-ECU APS5 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 accelerator 
pedal position sensor connector terminal and 
engine-ECU connector terminal APS5.

• 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 11: Accelerator pedal position sensor 

(main)

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 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 6.

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 APSM.

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

age.

Q: Is the check result normal?

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-104

YES : 

Go to Step 7.

NO : 

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

STEP 7. 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. P2123: Accelerator Pedal Position Sensor (main) Circuit High Input

OPERATION

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

tor pedal position sensor connector terminal from 
the engine-ECU connector terminal APS5.

• The power voltage is earthed to the engine-ECU 

connector terminal APSE from the accelerator 
pedal position sensor connector terminal.

• The sensor signal is inputted to the engine-ECU 

connector terminal APSM from the accelerator 
pedal position sensor output terminal.

FUNCTION

• The accelerator pedal position sensor (main) out-

puts voltage which corresponds to the accelera-
tor pedal depression.

• The engine-ECU checks whether the voltage is 

within a specified range.

TROUBLE JUDGMENT

Check Condition

• Ignition switch is "ON" position.

Judgement Criterion

• Accelerator pedal position sensor (main) output 

voltage is more than 4.8 V.

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

• Open circuit or harness damage in accelerator 

pedal position 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 11: Accelerator pedal position sensor 

(main)

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 
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 5.

NO : 

Go to Step 3.

STEP 3. Check harness between accelerator 
pedal position sensor connector terminal and 
engine-ECU connector terminal APSE.

• 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 11: Accelerator pedal position sensor 

(main)

Q: Is the check result normal?