Mitsubishi Outlander GS45X. Manual - part 797

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-121

STEP 1. Check harness connector A-33X at the MFI relay,
harness connector B-14 at the left bank heated oxygen
sensor (front) and harness connector B-10 at the ECM for
damage.
Q: Is the harness connector in good condition?

YES : Go to Step 2.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection

P.00E-2

. Then go to Step 6.

STEP 2. Check the left bank heated oxygen sensor (front).
(1) Disconnect left bank heated oxygen sensor (front)

connector B-14 and connect test harness special tool,
MD998464, to the connector on the left bank heated oxygen
sensor (front) side.

(2) Measure the resistance between left bank heated oxygen

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

Standard value: 4.5

− 8.0 Ω [at 20°C (68°F)]

Q: Is the measured resistance between 4.5 and 8.0 ohms

[at 20

°C (68°F)]?

YES : Go to Step 3.
NO : Replace the left bank heated oxygen sensor (front).

Then go to Step 6.

STEP 3. Check for harness damage between MFI relay
connector A-33X and left bank heated oxygen sensor
(front) connector B-14.
NOTE: Check harness after checking intermediate connector
A-13. If intermediate connector is damaged, repair or replace it.
Refer to GROUP 00E, Harness Connector Inspection

P.00E-2

Then go to Step 6 .
(1) Disconnect the MFI relay connector A-33X and the left bank

heated oxygen sensor (front) connector B-14.

(2) Measure the resistance between the MFI relay connector

A-33X (terminal No. 2) and the left bank heated oxygen
sensor (front) connector B-14 (terminal No. 1).

• Should be less than 2 ohms.

Q: Is the harness wire in good condition?

YES : Go to Step 4.
NO : Repair it. Then go to Step 6.

AK700179

MD998464

Red

Blue

Heated
oxygent
sensor
component
side
connector

AKA00834

B-14 harness
connector:
component side

A-33X harness
connector:
component side

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-122

STEP 4. Check for harness damage between left bank
heated oxygen sensor (front) connector B-14 and ECM
connector B-10.
(1) Disconnect the left bank heated oxygen sensor (front)

connector B-14 and the ECM connector B-10.

(2) Measure the resistance between the left bank heated

oxygen sensor (front) connector B-14 (terminal No. 3) and
the ECM connector B-10 (terminal No. 34).

• Should be less than 2 ohms.

Q: Is the harness wire in good condition?

YES : Go to Step 5.
NO : Repair it. Then go to Step 6.

STEP 5. 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 P0059 set?

YES : Replace the ECM. When the ECM is replaced,

with KOS>

P.42B-15

or GROUP 42C, Diagnosis

− ID

Codes Registration Judgment Table <Vehicles with
WCM>

P.42C-10

. Then go to Step 6.

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 6. 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 P0059 set?

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

AK700187

16 15 14 13 12 11 10 9 8 7 6 5 4 3

32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17

48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33

64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49

B-14 harness connector:
component side

B-10 harness connector:
component side

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-123

DTC P0068: Mass Airflow Sensor Plausibility

TECHNICAL DESCRIPTION

Compare the actual measurement of volumetric effi-
ciency by a mass airflow sensor signal with volumet-
ric efficiency estimated from a throttle position
sensor (main or sub) signal.

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

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-124

DTC SET CONDITIONS

Logic Flow Chart

Check Conditions

• The plausibility error of the throttle position sen-

sor (main) is detected.

• The plausibility error of the throttle position sen-

sor (sub) is detected.

Judgment Criterion

• For 0.36 second, the difference between the volu-

metric efficiency estimated by the (main) throttle
position sensor and the volumetric efficiency esti-
mated by the (sub) throttle position sensor is 8.8
% or less.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function

− OBD-II Drive Cycle

Pattern 17

P.13B-11

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

• Mass airflow sensor system failed.

• Intake system vacuum leak.

• There is some foreign matter around mass air-

flow sensor.

• ECM failed.

AK800586

Start

Yes

Continuous failure

for specified time

Malfunction

End

Good

Monitoring
conditions

|Calculated Ec {TPS (main)}

-calculated Ec {TPS (sub)}|

< 8.8 percent

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