Mitsubishi Outlander GS45X. Manual - part 623

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-315

DTC SET CONDITIONS <Circuit continuity 

− shorted high>

Logic Flow Chart

Check Condition

• Engine is running.

Judgement Criterion

• The coil current is 4.5 amperes or more with the 

injector driving for 2 seconds.

.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function 

− OBD-II Drive Cycle − 

Pattern 23 

P.13A-11

.

.

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

• No. 3 cylinder injector failed.

• Open or shorted No. 3 cylinder injector circuit, 

harness damage, or connector damage.

• ECM failed. 

DIAGNOSIS

Required Special Tools:

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

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

• MB991658: Test Harness

• MB992110: Power Plant ECU Check Harness

Good

Malfunction

Current >= 4.5A

End

Yes

No

No

No

AK604332

Start

Yes

Yes

Continuous

failure for 2secs

Monitoring
condition

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-316

STEP 1. Using scan tool MB991958, check actuator test 
item 1: No. 3 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. 3 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 harness connector B-103 at No. 3 cylinder 
injector for damage.
Q: Is the harness connector in good condition?

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

Connector Inspection 

P.00E-2

. Then go to Step 20.

STEP 3. Check the No. 3 cylinder injector.
(1) Disconnect the No. 3 cylinder injector connector B-103.
(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 4.
NO :  Replace the No. 3 cylinder injector. Then go to Step 

20.

AK700568AB

MB991824

MB991827

MB991910

Data link
connector

AK604038

1 2

AB

Injector side
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-317

STEP 4. Measure the power supply voltage at No. 3 
cylinder injector connector.
(1) Disconnect connector B-103 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 battery positive voltage (approximately 12 volts) 

present?
YES : Go to Step 14.
NO :  Go to Step 5.

STEP 5. Check harness connector A-24X at injector relay 
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 20.

STEP 6. Check the injector relay.
(1) Remove the injector relay.
(2) Check for continuity between the injector relay terminal No. 

1 and No. 2.
There should be continuity.

(3) Use jumper wires to connect injector relay terminal No. 1 to 

the positive battery terminal and terminal No. 2 to the 
negative battery terminal.

(4) Check for continuity between the injector relay terminal No. 

3 and No. 4 while connecting and disconnecting the jumper 
wire at the negative battery terminal.

• Continuity (2 ohms or less). <Negative battery terminal 

connected>

• Should be open loop. <Negative battery terminal discon-

nected>

(5) Install the injector relay.
Q: Is the measured resistance normal?

YES : Go to Step 7.
NO :  Replace the injector relay. Then go to Step 20.

AK604193

M

1

2

AB

B-103 harness
connector:
component side 

AK604033

1

2

3
4

Injector relay side connector

AB

AK604034

1

2

3
4

AB

Injector relay side connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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MULTIPORT FUEL INJECTION (MFI) <2.4L ENGINE>

13A-318

STEP 7. Check for continuity at injector relay harness side 
connector A-24X.
(1) Disconnect the connector A-24X 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 8.
NO :  Repair harness wire between injector relay connector 

A-24X (terminal No. 2) and ground because of open 
circuit or harness damage. Then go to Step 20.

STEP 8. Measure the power supply voltage at injector relay 
harness side connector A-24X.
(1) Disconnect the connector A-24X 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.

Q: Is battery positive voltage (approximately 12 volts) 

present?
YES : Go to Step 10.
NO :  Go to Step 9.

STEP 9. Check harness connector C-304 at ETACS-ECU for 
damage.
Q: Is the harness connector in good condition?

YES : Repair harness wire between injector relay connector 

A-24X (terminal No. 1) and ETACS-ECU connector 
C-304 (terminal No. 10) because of open circuit or 
short circuit to ground. Then go to Step 20.

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

Connector Inspection 

P.00E-2

. Then go to Step 20.

AK604037

2

1

3
4

AC

A-24X harness
connector:
component side

AK604036

2

1

3
4

AC

A-24X harness
connector:
component side