Mitsubishi Outlander GS45X. Manual - part 671

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-507

STEP 9. Check for harness damage between MFI relay 
connector A-33X (terminal No. 2) and EGR valve connector 
B-12 (terminal No. 2, No. 5).
NOTE: Check harness connector after checking intermediate 
connector A-13. If intermediate connector is damaged, repair or 
replace it. Refer to GROUP 00E, Harness Connector Inspec-
tion 

P.00E-2

. Then go to Step 11.

Q: Is the harness wire in good condition?

YES : Go to Step 10.
NO :  Repair it. Then go to Step 11.

STEP 10. Check for harness damage between EGR valve 
connector B-12 and ECM connector B-10.

a. EGR valve connector B-12 (terminal No. 1) and ECM con-

nector B-10 (terminal No. 31). 

b. EGR valve connector B-12 (terminal No. 3) and ECM con-

nector B-10 (terminal No. 32).

c. EGR valve connector B-12 (terminal No. 4) and ECM con-

nector B-10 (terminal No. 47).

d. EGR valve connector B-12 (terminal No. 6) and ECM con-

nector B-10 (terminal No. 48).

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 Step 11.

NO :  Repair it. Then go to Step 11.

STEP 11. 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 3 

P.13A-11

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0489 set?

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-508

DTC P0490: EGR Valve (stepper motor) Circuit Malfunction (battery 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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-509

.

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 whether a short circuit to the power 
supply 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 (step-
per motor).

.

DESCRIPTIONS OF MONITOR METHODS

When the EGR valve (stepper motor) drive circuit 

voltage is over 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-510

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 energized, the ECM voltage 

should be 6.7 volts or more 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.

• Shorted EGR valve (stepper motor) circuit, 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