Mitsubishi Outlander (2013+). Manual - part 316

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-145

YES : 

Go to Step 13.

NO : 

Replace the spark plug.

STEP 13. Check compression pressure.

• Check the compression pressure (Refer to 

GROUP 11A 

− On-vehicle Service − Compres-

sion Pressure Check ).

Q: Is the check result normal?

YES : 

Go to Step 14.

NO : 

Repair.

STEP 14. Check injector for spray condition.

• Injector check (Refer to 

P.13A-188

).

Q: Is the check result normal?

YES : 

Go to Step 15.

NO : 

Replace the injector.

STEP 15. Replace the catalytic converter.

• After the replacing the catalytic converter, 

re-check the trouble symptoms.

Q: Does the trouble symptom persist?

YES : 

Replace the engine-ECU.

NO : 

Check end.

Inspection Procedure 17: Battery Run Down

OPERATION

• The exciting currents of the alternator field coil 

are input into the engine-ECU connector terminal 
ALTL from the alternator connector.

• The electric generating capacity of the alternator 

connector terminal is restricted according to the 
signal from the engine-ECU connector terminal 
ALTG.

COMMENTS ON TROUBLE SYMPTOM

• The failure could possibly be caused by the failed 

alternator, defective alternator control system and 
so on.

PROBABLE CAUSES

• Failed battery

• Open/short circuit or harness damage in alterna-

tor L terminal circuit

• Short circuit in alternator G terminal

• Failed alternator

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check battery.

• Check battery (Refer to GROUP 54A − Battery − 

On-vehicle Service 

− Battery Test ).

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Replace the battery.

STEP 2. Perform voltage measurement at 
alternator connector

• Disconnect connector, and measure at harness 

side.

• Ignition switch: "ON"

• Voltage between terminal engine-ECU ALTL line 

and body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Go to Step 3.

STEP 3. Check harness between engine-ECU 
connector terminal ALTL and alternator 
connector terminal.

• 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. Check the trouble symptom.

Q: Does the trouble symptom persist?

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 5. Check harness between engine-ECU 
connector terminal ALTL and alternator 
connector terminal.

• Check power supply line for damage.

Q: Is the check result normal?

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-146

YES : 

Go to Step 6.

NO : 

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

STEP 6. Perform voltage measurement at 
alternator connector.

• Disconnect connector, and measure at alternator 

side.

• Connect special tool Test Harness (MB991658) 

to all terminals except the terminal engine-ECU 
ALTG line.

• Ignition switch: "ON"

• Voltage between terminal engine-ECU ALTG line 

and body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 7.

NO : 

Replace the alternator.

STEP 7. Check harness between engine-ECU 
connector terminal ALTG and alternator 
connector terminal.

• Check output line for short circuit.

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. 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.

• Engine: Idle operation after warm-up

• Transmission: P range

• Cooling fan: Not operated

• Voltage between terminal ALTG and body earth.

OK: The voltage increases when the head-
lamp switch and the rear window defogger 
switch are turned "ON" from "OFF".

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 4.

Inspection Procedure 18: Overheating

COMMENTS ON TROUBLE SYMPTOM

• The failure could possibly be caused by the failed 

engine cooling system, defective cooling fan sys-
tem, faulty engine coolant temperature sensor 
and so on.

PROBABLE CAUSES

• Insufficient amount or deteriorated quality of 

engine coolant

• Failed cooling fan system

• Failed engine coolant temperature sensor

• Failed thermostat

• Failed water pump

• Failed radiator core

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

Q: Is the diagnosis code set?

YES : 

Inspection chart for diagnosis code (Refer 

to 

P.13A-23

).

NO : 

Go to Step 2.

STEP 2. Check engine coolant.

NOTE: When the engine coolant level is too low, 
check for any section that cases leakage and repair, 
if necessary. 

• Check engine coolant (Refer to GROUP 14 − 

On-vehicle Service 

− Engine Coolant Leak Check 

).

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Replace or fill the engine coolant.

STEP 3. M.U.T.-III actuator test

• Item 14: Cooling fan motor

OK: Fan motor rotates at high speed.

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Check fan control relay system (Refer to 
GROUP 14 

− Troubleshooting ).

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-147

STEP 4. M.U.T.-III data list

• Item 6: Engine coolant temperature sensor

OK: 

Engine cold state: At ambient temperature 

(atmospheric temperature) or equivalent.

Engine hot state: At 80 

− 120°C

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Check engine coolant temperature sensor 
system. Check code No. P0117: engine 
coolant temperature sensor circuit low input 
(Refer to 

P.13A-41

). Check code No. 

P0118: engine coolant temperature sensor 
circuit high input (Refer to 

P.13A-42

).

STEP 5. Check thermostat.

• Check thermostat (Refer to GROUP 14 − Ther-

mostat 

− Inspection ).

Q: Is the check result normal?

YES : 

Go to Step 6.

NO : 

Replace the thermostat.

STEP 6. Check water pump.

• Check water pump (Refer to GROUP 14 − 

On-vehicle Service 

− Water Pump Coolant Leak 

Check ).

Q: Is the check result normal?

YES : 

Replace the radiator.

NO : 

Replace the water pump.

Inspection Procedure 19: Engine-ECU Power Supply, Engine Control Relay, Ignition Switch-IG1 
System

OPERATION

• Battery voltage is applied to the engine control 

relay power supply line.

• Engine-ECU connector terminal C/R applies cur-

rent to the engine control relay coil by turning ON 
the power transistor in the unit in order to turn the 
relay ON.

• When the engine control relay is turned ON, the 

battery power will be supplied from the engine 
control relay to the engine-ECU, sensor and actu-
ator.

FUNCTION

• When the ignition switch ON signal is input into 

the engine-ECU via ETACS-ECU, the 
engine-ECU turns ON the engine control relay. 
This causes battery voltage to be supplied to the 
engine-ECU, sensor and actuator.

PROBABLE CAUSES

• Failed battery

• Failed engine control relay

• Failed ignition switch <Vehicles without KOS>

• Failed OSS-ECU <Vehicles with KOS>

• Open/short circuit or harness damage in engine 

control relay circuit, or loose connector contact.

• Open/short circuit or harness damage in ignition 

switch (IG1) circuit, or loose connector contact.

• Open circuit or harness damage in engine-ECU 

earth circuit, or loose connector contact.

• Failed ETACS-ECU

• Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check battery.

• Battery check (Refer to GROUP 54A − Battery − 

On-vehicle Service 

− Battery Test ).

Q: Is the check result normal?

YES : 

Go to Step 2.

NO : 

Replace the battery.

STEP 2. Check engine control relay itself.

• Engine control relay connector check.

• Engine control relay continuity check (Refer to 

P.13A-184

).

Q: Is the check result normal?

YES : 

Go to Step 3.

NO : 

Repair or replace the connector, or replace 
the engine control relay.

STEP 3. Perform voltage measurement at engine 
control relay connector

• Remove relay, and measure at relay box side.

• Voltage between terminal power supply lines and 

body earth

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 4.

NO : 

Check and repair harness between battery 

and engine control relay connector power 
supply line.

• Check power supply line for 

open/short circuit.

TROUBLESHOOTING

MULTIPOINT FUEL INJECTION (MPI)

13A-148

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

• Disconnect connector, and measure at harness 

side.

• Voltage between terminal C/R and body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 5.

NO : 

Repair or replace the connector, or check 

and repair harness between engine control 
relay connector terminal and engine-ECU 
connector terminal C/R.

• Check signal line for open/short 

circuit.

STEP 5. Perform voltage measurement at 
engine-ECU connector.

• Disconnect connector, and measure at harness 

side.

• Short-circuit engine-ECU connector terminal C/R 

to the body earth.

• Voltage between terminal BAT1 and body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 8.

NO : 

Go to Step 6.

STEP 6. Check harness between engine control 
relay connector terminal and engine-ECU 
connector terminal BAT1.

• Check output line for open/short circuit.

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 the battery and 
engine control relay connector terminal.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Check and repair harness between engine 

control relay connector terminal and 
engine-ECU connector terminal C/R.

• Check signal line for damage.

NO : 

Repair the damaged harness wire.

STEP 8. Check harness between engine-ECU 
connector terminal BAT1 and engine control 
relay connector terminal.

• Check output line for damage.

Q: Is the check result normal?

YES : 

Go to Step 9.

NO : 

Repair the damaged harness wire.

STEP 9. Check harness between battery and 
engine control relay connector terminal.

• Check power supply line for damage.

Q: Is the check result normal?

YES : 

Go to Step 10.

NO : 

Repair the damaged harness wire.

STEP 10. Perform voltage measurement at 
engine-ECU connector.

• Disconnect connector, and measure at harness 

side.

• Ignition switch: "ON"

• Voltage between terminal IGN and body earth.

OK: System voltage

Q: Is the check result normal?

YES  : 

Go to Step 15 <Vehicles without KOS>.

YES  : 

Go to Step 16 <Vehicles with KOS>.

NO : 

Go to Step 11.

STEP 11. Perform voltage measurement at 
ETACS-ECU connector.

• Disconnect connector, and measure at harness 

side.

• Ignition switch: "ON"

• Voltage between terminal IGN and body earth.

OK: System voltage

Q: Is the check result normal?

YES : 

Go to Step 14.

NO  : 

Go to Step 12 <Vehicles without KOS>.

NO  : 

Go to Step 13 <Vehicles with KOS>.

STEP 12. Check ignition switch itself.

• Check ignition switch connector check.

• Check ignition switch itself (Refer to GROUP 54A 

− Ignition switch − Inspection − Ignition Switch 
Check ).

Q: Is the check result normal?

YES : 

Check and repair harness between ignition 

switch connector terminal IG1 line and 
ETACS-ECU connector terminal IG1.

• Check signal line for open/short 

circuit.

NO : 

Repair or replace the connector, or replace 
the ignition switch.