Mitsubishi Outlander GS45X. Manual — part 787

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-81

.

CIRCUIT OPERATION

• Power is supplied from the MFI relay (terminal

No. 2) to the right bank heated oxygen sensor
(rear) heater.

• The ECM (terminal No. 49) controls continuity to

the right bank heated oxygen sensor (rear)
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

Right bank heated oxygen sensor heater (rear) 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

AK900130AD

Right bank heated
oxygen sensor (rear)

Front exhaust
pipe RH

B-02 (B)

Connector: B-02

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-82

DTC SET CONDITION

Logic Flow Chart

.

Check Conditions

• More than 2 seconds have passed since the

engine starting sequence was completed.

• While the right bank heated oxygen sensor (rear)

heater is on.

• Battery positive voltage is at between 11 and 16.5

volts.

Judgement Criterion

• The right bank heated oxygen sensor (rear)

heater current has continued to be higher than
10.5 ampere for 2 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: )

• Right bank heated oxygen sensor (rear) failed.

• ECM failed.

End

No

No

Malfunction

Good

Current < 0.17A

or

Current > 10.5A

Voltage < 2.0V

AK900352

Heater activation
command ON

No

No

Start

Yes

Yes

Yes

Yes

Yes

No

Continuous
failure for 2secs

Monitoring
conditions

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-83

DIAGNOSIS

Required Special Tool:

• MB991316: Test Harness

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

connector B-02 and connect test harness special tool,
MD998464, to the connector on the right 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 right 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 P0038 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 P0038 set?

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

AK700179

MD998464

Red

Blue

AB

Heated
oxygent
sensor
component
side
connector

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-84

DTC P003C: Mitsubishi Innovative Valve Timing Electronic Control System (MIVEC) Performance
Problem

.

CIRCUIT OPERATION

• A battery positive voltage is applied to the engine

oil pressure switch output terminal (terminal No.
1) from the ECM (terminal No. 7) via the resistor
in the ECM.

.

TECHNICAL DESCRIPTION

• The engine oil pressure switch converts the exist-

ence of a engine oil pressure into a high/low volt-
age, and inputs it into the ECM.

• When the engine oil control valve operates, the

engine oil pressure in the MIVEC system rises.
The engine oil pressure switch opens, thus inter-
rupting the application of the battery positive volt-
age. As a result, the output voltage of the engine
oil pressure switch will fluctuate between 0 and
12 volts.

• The ECM checks whether the engine oil pressure

switch "OFF" or "ON" during driving.

.

1

AK703892

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

7

AB

RED-BLA

CK

B-107

(MU802767)

1

ENGINE OIL PRESSURE SWITCH (FOR MIVEC) CIRCUIT

ENGINE OIL
PRESSURE
SWITCH
(FOR MIVEC)

B-10

OFF

ON

ENGINE
CONTROL
MODULE

AK900151AC

B-107 (B)

Connector: B-107

Engine oil pressure
switch (for MIVEC)

AK700401AB

ECM

B-10 (GR)

Connector: B-10