Mitsubishi Outlander GS45X. Manual - part 796

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-117

DIAGNOSIS

Required Special Tool:

• MB991316: Test Harness

STEP 1. Check the left bank heated oxygen sensor (rear).
(1) Disconnect left bank heated oxygen sensor (rear) connector 

B-13 and connect test harness special tool, MB991316, to 
the connector on the left bank heated oxygen (rear) sensor 
side.

(2) Measure the resistance between heated oxygen sensor 

connector terminal No. 1 (red clip) and terminal No. 3 (blue 
clip).

Standard value: 11 

− 18 Ω [at 20°C (68°F)]

Q: Is the measured resistance between 11 and 18 ohms [at 

20

°C (68°F)]?

YES : Go to Step 2.
NO :  Replace the left bank heated oxygen sensor (rear). 

Then go to Step 3.

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 2 

P.13B-11

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0058 set?

YES : 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 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 2 

P.13B-11

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0058 set?

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

AK700175

Heated
oxygent
sensor
component
side
connector

MB991316

Red

Blue

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-118

DTC P0059: Heated Oxygen Sensor Heater Resistance (bank 2, sensor 1)

AK700131

1

3

2

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

10 111213 14 1516 17 1819 20

2 3 4

5 6 7 8 9

2

1

4

3

AB

20A

WHITE

BLUE

WHITE

WHITE

WHITE

A-33X

4

3

1

2

22

1

2

3

4

34

4

B-14

MU802605

B-10

A-13

OFF

ON

36

FUSIBLE LINK

RELAY BOX
(ENGINE COMPARTMENT)

TO ECM

TO ECM TO ECM

ENGINE
CONTROL
MODULE

LEFT BANK HEATED OXYGEN SENSOR (FRONT) HEATER CIRCUIT

LEFT BANK HEATED
OXYGEN SENSOR (FRONT)

MFI
RELAY

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-119

.

CIRCUIT OPERATION

• Power is supplied from the MFI relay (terminal 

No. 2) to the left bank heated oxygen sensor 
(front) heater.

• The ECM (terminal No. 34) controls continuity to 

the left bank heated oxygen sensor (front) heater 
by turning the power transistor in the ECM "ON" 
and "OFF".

.

TECHNICAL DESCRIPTION

• The ECM checks whether the heater current is 

within a specified range when the heater is ener-
gized.

.

DESCRIPTIONS OF MONITOR METHODS

Left bank heated oxygen sensor heater (front) cur-

rent is out of specified range.

.

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)

• Not applicable

Sensor (The sensor below is determined to be 

normal)

• Not applicable

.

AK700399AB

MFI relay

A-33X

Connector: A-33X

AK700404

Left bank heated oxygen
sensor (front)

Connector: B-14

AB

B-14 (B)

AK700401AB

ECM

B-10 (GR)

Connector: B-10

AK900602

Connector: A-13

A-13

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-120

DTC SET CONDITION

Logic Flow Chart

.

Check Conditions

• More than 60 seconds have passed since the 

engine starting sequence was completed.

• While the left bank heated oxygen sensor (front) 

heater is on.

• Battery positive voltage is at between 11 and 16.5 

volts.

• Intake air temperature is more than −10°C (14°F).

• On duty cycle of the left bank heated oxygen sen-

sor (front) heater is between 3 and 97 percent.

Judgement Criterion

• The left bank heated oxygen sensor (front) heater 

current has continued to be lower than average 
0.6 ampere for 10 seconds.

.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function 

− OBD-II Drive Cycle − 

Pattern 2 

P.13B-11

.

.

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

• Left bank heated oxygen sensor (front) heater 

failed.

• Connector damage.

• Harness damage

• ECM failed.

DIAGNOSIS

Required Special Tools:

• MD998464: Test Harness

End

No

No

No

Malfunction

Good

Heater current

< 0.6 A

AKA00341

Start

Yes

Yes

Yes

Continuous
failure for 10secs

Monitoring
conditions