Mitsubishi Outlander GS45X. Manual - part 622

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-311

STEP 19. Using the oscilloscope, check the No. 2 cylinder 
injector.
(1) Disconnect the No. 2 cylinder injector connector B-120 and 

connect the test harness special tool MB991658 between 
the separated connectors. (All terminals should be 
connected.)

(2) Connect the oscilloscope probe to the injector side 

connector terminal No. 2.
NOTE: When measuring with the ECM side connector, dis-
connect all ECM connectors. Connect the check harness 
special tool (MB992110) between the separated connec-
tors. Then connect the oscilloscope probe to the check har-
ness connector terminal No. 3.

(3) Start the engine and run at idle.

(4) Measure the waveform.

• The waveform should show a normal pattern similar to 

the illustration.

(5) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the waveform normal?

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 20.

STEP 20. 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 P0202 set?

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

AK604471

1 2

AB

Injector
connector

MB991658

Oscilloscope

AK604546 AB

A

Normal  waveform

A:Injector drivetime 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-312

DTC P0203: Injector Circuit-Cylinder 3

AKA00838

1

3

2

4

1

2

3
4

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 2 3 4

5 6 7

15

14

13

12

11

9

8

1

6

4

5

9

8

10

10

11

13

15

14

12

16

7

2 3

2

1

1

10 111213 14 1516 17 1819 20

2 3 4

5 6 7 8 9

 

INJECTOR CIRCUIT-CYLINDER 3

BLUE

B-10

AB

20A

WHITE

WHITE

A-33X

MFI
RELAY

4

3

1

2

22

36

FUSIBLE LINK

OFF

ON

4

1

7

A-13

A-24X

3

2

INJECTOR
RELAY

OFF

ON

RELAY BOX
(ENGINE COMPARTMENT)

ENGINE CONTROL MODULE

TO ECM

BLA

CK

BLA

CK

BLA

CK

INJECTOR
NO. 3

B-103

(MU802062)

1

2

18

RED-

WHITE

RED-

WHITE

GREEN

WHITE

WHITE

WHITE

VIOLET

VIOLET

10

6

C-304

C-317

IGNITION
SWITCH (IG1)

ETACS-
ECU

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-313

.

CIRCUIT OPERATION

• The injector power is supplied from the injector 

relay (terminal No. 3).

• The ECM controls the injector by turning the 

power transistor in the ECM "ON" and "OFF".

.

TECHNICAL DESCRIPTION

• The amount of fuel injected by the injector is con-

trolled by the amount of continuity time the coil is 
grounded by the ECM.

.

DESCRIPTIONS OF MONITOR METHODS

The ECM detects open circuit and short malfunction.

.

MONITOR EXECUTION

Continuous

.

AK704087AB

Connector: A-13

A-13

AK704115

Injector relay

AB

Connector: A-24X

A-24X

AK704088

MFI relay

AB

Connector: A-33X

A-33X

AK704121

AB

Injector No. 3

Connector: B-103

B-103 (GR)

AK704090AB

Connector: B-10

B-10 (GR)

AK704117 AB

ETACS-ECU

Connectors: C-304, C-317

C-317

C-304

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-314

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

.

DTC SET CONDITIONS <Circuit continuity 

− open circuit and shorted low>

Logic Flow Chart

Check Condition

• Engine is running.

Judgement Criterion

• The supply voltage is 3 volts or less without the 

injector driving for 2 seconds.

.

Good

Malfunction

Injector voltage <= 3V

End

No

No

No

No

AK604331

Start

Yes

Yes

Continuous

failure for 2secs

Monitoring
conditions