Mitsubishi Outlander GS45X. Manual — part 597

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-211

DTC SET CONDITIONS <Range/Performance problem

− low input (Time to reach

closed loop temperature)>

Logic Flow Chart

Check Conditions, Judgement Criteria

• About 90 − 300 seconds have passed for the

engine coolant temperature to rise to about 0

°C

(32

°F) after starting sequence was completed.

• However, time is not counted when fuel is shut

off.

.

OBD-II DRIVE CYCLE PATTERN

• Refer to Diagnostic Function − OBD-II Drive

Cycle

− Pattern 9

P.13A-11

.

TROUBLESHOOTING HINTS (The most likely

causes for this code to be set are:)

• Engine coolant temperature sensor failed.

• Engine coolant temperature sensor circuit har-

ness damage, or connector damage.

• ECM failed.

End

No

No

Malfunction

Good

Specified time

has passed without fuel cut after

engine start?

Engine

coolant

temp.

Closed loop

enable temp.

>

No

AK900354

Start

Yes

Yes

Yes

Monitoring
conditions

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-212

DIAGNOSIS

Required Special Tools:

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

STEP 1. Using scan tool MB991958, check data list item 6:
Engine Coolant Temperature Sensor.

CAUTION

To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the data reading mode for item

6, Engine Coolant Temperature Sensor.

• The engine coolant temperature and temperature

shown with the scan tool should approximately match.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

− How to

Cope with Intermittent Malfunctions

P.00-15

.

NO : Go to Step 2.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-213

STEP 2. Measure the sensor output voltage at engine
coolant temperature sensor connector B-09 by
backprobing.
(1) Do not disconnect the connector B-09.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 1 and ground by

backprobing.

• When engine coolant temperature is −20°C (−4°F), volt-

age should be between 3.9 and 4.5 volts.

• When engine coolant temperature is 0°C (32°F), voltage

should be between 3.2 and 3.8 volts.

• When engine coolant temperature is 20°C (68°F), volt-

age should be between 2.3 and 2.9 volts.

• When engine coolant temperature is 40°C (104°F), volt-

age should be between 1.3 and 1.9 volts.

• When engine coolant temperature is 60°C (140°F), volt-

age should be between 0.7 and 1.3 volts.

• When engine coolant temperature is 80°C (176°F), volt-

age should be between 0.3 and 0.9 volt.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage within the specified range?

YES : Go to Step 3.
NO : Go to Step 5.

STEP 3. Check harness connector B-09 at the engine
coolant temperature sensor for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 4.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 14.

STEP 4. Using scan tool MB991958, check data list item 6:
Engine Coolant Temperature Sensor.
(1) Turn the ignition switch to the "ON" position.
(2) Set scan tool MB991958 to the data reading mode for item

6, Engine Coolant Temperature Sensor.

• The engine coolant temperature and temperature

shown with the scan tool should approximately match.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent.

Refer to GROUP 00, How to Use
Troubleshooting/Inspection Service Points

− How to

Cope with Intermittent Malfunctions

P.00-15

.

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 14.

AK201572

2

1

AG

B-09 harness
connector:
harness side

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-214

STEP 5. Check harness connector B-09 at engine coolant
temperature sensor for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 6.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 14.

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

side.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal No. 1 and ground.

• Voltage should be between 4.5 and 4.9 volts.

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

YES : Go to Step 8.
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 : 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 14.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 14.

STEP 8. 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 11.
NO : Go to Step 9.

AK604181

1

2

AC

B-09 harness
connector:
component side

AK604180

1

2

B-09 harness
connector:
component side

AC