Mitsubishi Outlander GS45X. Manual - part 669

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-499

STEP 1. Using scan tool MB991958, read the combination 
meter diagnostic trouble code (DTC).

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) Read the combination meter DTC.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the combination meter DTC set?

YES : Refer to GROUP 54A, Combination Meter 

− 

Diagnosis Trouble Code Chart 

P.54A-34

NO :  Go to Step 2.

STEP 2. Check the trouble symptoms.
(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 P0463 set?

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 

Code Registration Judgment Table <Vehicles with 
WCM> 

P.42C-10

. Then go to Step 3.

NO :  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

.

STEP 3. 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 P0463 set?

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

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

Next>>

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-500

13A

DTC P0489: EGR Valve (stepper motor) Circuit Malfunction (ground short)

1

2 3

4

5 6

AK604250

1

2

3 4 5 6 7 8 9 10 11 12 13 14 15 16

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

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

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

1

3

2

4

1

10 111213 14 1516 17 1819 20

2 3 4

5 6 7 8 9

1

3

4

6

31

32

47

48

B-12

(MU802056)

B-10

20A

WHITE

WHITE

WHITE

WHITE

RED

SKY BLUE

GRA

Y

-BLUE

LIGHT GREEN

WHITE

A-33X

4

3

1

2

22

OFF

ON

AC

EGR VALVE (STEPPER MOTOR) CIRCUIT

EGR VALVE
(STEPPER MOTOR)

36

FUSIBLE LINK

4

2

5

A-13

RELAY BOX
(ENGINE COMPARTMENT)

ENGINE CONTROL MODULE

MFI
RELAY

TO ECM

<< Previous

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-501

.

CIRCUIT OPERATION

• The EGR valve power is supplied from the MFI 

relay (terminal No. 2).

• The ECM (terminals No. 31, No. 32, No. 47, No. 

48) drives the stepper motor by sequentially turn-
ing "ON" the power transistors in the ECM and 
providing ground to the EGR valve (terminal No. 
1, No. 3, No. 4, No. 6).

.

TECHNICAL DESCRIPTION

The ECM checks wether a short circuit to the ground 
or an open circuit exists or not by measuring the 
EGR valve (stepper motor) drive circuit voltage when 
the current is not flowing through the coil of the EGR 
valve (stepper motor).

.

DESCRIPTIONS OF MONITOR METHODS

When the EGR valve (stepper motor) drive circuit 

voltage is under the specified range, it is judged 
that a malfunction exists.

.

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)

• EGR valve (stepper motor)

Sensor (The sensor below is determined to be 

normal)

• Mass airflow sensor

• Engine coolant temperature sensor

• Intake air temperature sensor

• Barometric pressure sensor

• Accelerator pedal position sensor

• Manifold absolute pressure sensor

.

AK704087AB

Connector: A-13

A-13

AK704088

MFI relay

AB

Connector: A-33X

A-33X

AK704090AB

Connector: B-10

B-10 (GR)

AK704137

Evaporative emission
purge solenoid

Exhaust gas
recirculation
(EGR) valve

AB

Connector: B-12

B-12 (GR)

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-502

DTC SET CONDITIONS
Logic Flow Chart

.

Check Conditions

• Ignition switch is "ON" position.

• Battery positive voltage is between 10 and 16.5 

volts.

Judgement Criterion

• When EGR valve is de-energized, the EGR volt-

age should be 1.5 volts or less for 1.4 seconds.

.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function 

− OBD-II Drive Cycle − 

Pattern 3 

P.13A-11

.

.

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

• EGR valve (stepper motor) failed.

• Open or shorted EGR valve (stepper motor) cir-

cuit, harness damage, or connector damage.

• ECM failed.

End

Malfunction

Good

No

No

No

No

No

Stepper motor activation

command ON?

AK900363

Start

Yes

Yes

Yes

Yes

Yes

Continuous

failure for 1.4secs

Monitoring
conditions

Circuit voltage

>

 6.7V

Circuit voltage

< 1.5V