Mitsubishi Outlander GS45X. Manual — part 592

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-191

STEP 4. Check harness connector B-10 at ECM for
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 5.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 10.

STEP 5. Measure the sensor supply voltage at ECM
connector B-10 by using power plant ECU check harness
special tool MB992110.
(1) Disconnect all ECM connectors. Connect the power plant

ECU check harness special tool MB992110 between the
separated connectors.

(2) Disconnect the engine coolant temperature sensor

connector B-09.

(3) Turn the ignition switch to the "ON" position.

(4) Measure the voltage between terminal No. 26 and ground.

• Voltage should be between 4.5 and 4.9 volts.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.5 and 4.9 volts?

YES : Repair harness wire between engine coolant

temperature sensor connector B-09 (terminal No. 1)
and ECM connector B-10 (terminal No. 26) because
of open circuit. Then go to Step 10.

NO : Replace the ECM. When the ECM is replaced,

register the ID code. Refer to GROUP 42B, Diagnosis
− ID Code Registration Judgment Table <Vehicles

with KOS>

P.42B-15

or GROUP 42C, Diagnosis

− ID

Codes Registration Judgment Table <Vehicles with
WCM>

P.42C-10

. Then go to Step 10.

AK604040

ECM

AB

Body side harness

MB992110

AK604182

16 15 14 13 12 11 10 9 8 7 6 5 4 3

2

1

32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17

48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

AB

Power plant ECU
check harness connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-192

STEP 6. Check the continuity at engine coolant
temperature sensor harness side connector B-09.
(1) Disconnect the connector B-09 and measure at the harness

side.

(2) Check for the continuity between terminal No. 2 and

ground.

• Continuity (2 ohms or less)

Q: Does continuity exist?

YES : Go to Step 9.
NO : Go to Step 7.

STEP 7. Check harness connector B-10 at ECM for
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 8.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 10.

STEP 8. Check for open circuit between engine coolant
sensor connector B-09 (terminal No. 2) and ECM connector
B-10 (terminal No. 27).
Q: Is the harness wire in good condition?

YES : Replace the ECM. When the ECM is replaced,

register the ID code. Refer to GROUP 42B, Diagnosis
− ID Code Registration Judgment Table <Vehicles

with KOS>

P.42B-15

or GROUP 42C, Diagnosis

− ID

Codes Registration Judgment Table <Vehicles with
WCM>

P.42C-10

. Then go to Step10.

NO : Repair it. Then go to Step 10.

STEP 9. Check the engine coolant temperature sensor.
Refer to Engine Coolant Temperature Sensor

P.13A-874

.

Q: Is the engine coolant temperature sensor normal?

YES : Replace the ECM. When the ECM is replaced,

register the ID code. Refer to GROUP 42B, Diagnosis
− ID Code Registration Judgment Table <Vehicles

with KOS>

P.42B-15

or GROUP 42C, Diagnosis

− ID

Codes Registration Judgment Table <Vehicles with
WCM>

P.42C-10

. Then go to Step 10.

NO : Replace the engine coolant temperature sensor. Then

go to Step 10.

AK604180

1

2

B-09 harness
connector:
component side

AC

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-193

STEP 10. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to

Diagnostic Function

− OBD-II Drive Cycle − Pattern 23

P.13A-11

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0118 set?

YES : Retry the troubleshooting.
NO : The inspection is complete.

DTC P0121: Throttle Position Sensor (main) Plausibility

.

TECHNICAL DESCRIPTION

Compare the actual measurement of volumetric effi-
ciency by a mass airflow sensor signal with the volu-
metric efficiency estimated from a throttle position
sensor (main) signal.

.

MONITOR EXECUTION

Continuous

.

MONITOR EXECUTION CONDITIONS
(Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored

in memory for the item monitored below)

• Not applicable

Sensor (The sensor below is determined to be

normal)

• Not applicable

.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

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DTC SET CONDITIONS

Logic Flow Chart

Check Conditions

• The difference between the actual volumetric effi-

ciency and the volumetric efficiency estimated by
the (main) throttle position sensor is 0 percent or
more. Or, the volumetric efficiency is 60 percent
or less.

• The engine speed is between 750 and 3,000

r/min. Or, the throttle position sensor (main) out-
put voltage is 3 volts or less.

Judgment Criterion

• For 0.4 second, the difference between the actual

volumetric efficiency and the volumetric efficiency
estimated by the (main) throttle position sensor is
33 percent or more.

.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function

− OBD-II Drive Cycle

Pattern 17

P.13A-11

.

.

TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are:)

• Throttle position sensor (main) system failed.

• Intake system vacuum leak.

• ECM failed.

AK604351

Start

Yes

Yes

Yes

No

No

No

Continuous failure

for specified time

Malfunction

End

Good

Monitoring
conditions

|Ec-calculated Ec|
> specified value

Ec: load value