Mitsubishi Outlander GS45X. Manual - part 856

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-357

STEP 1. Using scan tool MB991958, check actuator test 
item 1: No. 2 Injector.

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) Start the engine and run at idle.
(3) Set scan tool MB991958 to the actuator testing mode for 

item 1, No. 2 injector.

(4) Warm up the engine to normal operating temperature: 80

°C 

to 95

°C (176°F to 203°F).

• The idle should become slightly rougher.

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

STEP 2. Check the for harness connector B-120 at No. 2 
cylinder injector and B-10 at the ECM for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 3.
NO :  Repair it. Refer to GROUP 00E, Harness Connector 

Inspection 

P.00E-2

. Then go to Step 7.

STEP 3. Measure the power supply voltage at the injector 
connector B-120.
(1) Disconnect the injector connector B-120 (terminal No. 1) 

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 battery positive voltage.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured resistance battery positive voltage?

YES : Go to Step 4.
NO :  Check harness connector A-13 at intermediate 

connector for damage, and repair or replace as 
required. Refer to GROUP 00E, Harness Connector 
Inspection 

P.00E-2

. If intermediate connector is in 

good condition, repair harness wire between injector 
relay connector A-24X (terminal No. 3) and injector 
connector B-120 (terminal No. 1) because of open 
circuit. Then go to Step 7.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

AK700302

1

2

AB

B-120
harness connector:
harness side

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-358

STEP 4. Check the No. 2 cylinder injector.
(1) Disconnect the No. 2 cylinder injector connector B-120.
(2) Measure the resistance between injector side connector 

terminal No. 1 and No. 2.

 Standard value: 10.5 

− 13.5 ohms [at 20°C (68°F)]

Q: Is the measured resistance between 10.5 and 13.5 ohms 

[at 20

°C (68°F)]?

YES : Go to Step 5.
NO :  Replace the No. 2 cylinder injector. Then go to Step 7.

STEP 5. Check for harness between the injector connector 
B-120 and the ECM connector B-10.
(1) Disconnect the injector connector B-120 and the ECM 

connector B-10.

(2) Measure the resistance between injector connector B-120 

(terminal No. 2) and the ECM connector B-10 (terminal No. 
3).

• Should be less than 2 ohms.

(3) Measure the continuity between the injector connector 

B-120 (terminal No. 2) and ground.

• Not continuity.

Q: Is the connector wire in good condition?

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

Inspection 

P.00E-2

. Then go to Step 7.

AK700204

1 2

AB

Injector side
connector

1

2

AK700303AB

B-120
harness connector:
component side

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-359

STEP 6. 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 an 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 Codes 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 7.

STEP 7. 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 22 

P.13B-11

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0202 set?

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

AK700557

1 2

AB

Injector connector

MB991658

Oscilloscope

AK700301

Normal waveform

A: Injector drive time

A

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-360

DTC P0203: Injector Circuit - Cylinder 3

AK700145

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

1

2 3

6

7 8

4 5

9 10

2

1

1

10 111213 14 1516 17 1819 20

2 3 4

5 6 7 8 9

B-103

(MU802062)

B-21

MU802645

6

2

18

8

BLUE

BLUE

GREEN

GREEN

B-10

AB

20A

WHITE

WHITE

A-33X

4

3

1

2

22

OFF

ON

WHITE

RED-WHITE

4

1

10

6

7

C-304

C-317

A-13

A-24X

3

BLUE

2

OFF

ON

WHITE

1

FUSIBLE LINK

36

ETACS-
ECU

INJECTOR CIRCUIT-CYLINDER 3

BLA

CK

BLA

CK

BLA

CK

IGNITION
SWITCH (IG1)

INJECTOR
RELAY

RELAY BOX
(ENGINE COMPARTMENT)

TO ECM

ENGINE CONTROL MODULE

MFI
RELAY

INJECTOR
NO. 3