Mitsubishi Outlander XL. Manual — part 222

Judgement Criterion

｠

The center exhaust pipe heated oxygen sensor
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.13Ab-8.

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

｠

Center exhaust pipe heated oxygen sensor heater.

｠

ECM failed.

DIAGNOSIS

Required Special Tool:

｠

MB991658: Test Harness

STEP 1. Check the center exhaust pipe heated oxygen
sensor.

ZK600444

MB991658

AA00

Heated oxygen
sensor component
side connector

(1)

Disconnect center exhaust pipe heated oxygen sensor
connector D-30 and connect test harness special tool,
MB991658, to the connector on the center exhaust pipe
heated oxygen sensor side.

(2)

Measure the resistance between heated oxygen sensor
connector terminal No. 1 and terminal No. 2.

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 2.

NO:

Replace the center exhaust pipe heated oxygen sensor.

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.
13Ab-8.

(2)

Check the diagnostic trouble code (DTC).

Q:Is DTC P0044 set?

YES:

Replace the ECM. When the ECM is replaced, register

the ID code. Refer to GROUP 42B, ID Code Registration
Judgment Table <Vehicles with KOS> P.42B-12or GROUP
42C, ID Code Registration Judgment Table <Vehicles with
WCM> P.42C-8. 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.
13Ab-8.

(2)

Check the diagnostic trouble code (DTC).

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-83

DIAGNOSTIC TROUBLE CODE PROCEDURES

Q:Is DTC P0044 set?

YES:

Retry the troubleshooting.

NO:

The inspection is complete.

DTC P0051: Heated Oxygen Sensor Heater Control Circuit Low (bank 2, sensor 1)

M11310100165USA0000010000

ZK602831

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

AA00

20A

WHITE

BLUE

WHITE

WHITE

WHITE

A-33X

MFI
RELAY

RELAY BOX
(ENGINE COMPARTMENT)

4

3

1

2

22

TO ECM

LEFT BANK HEATED
OXYGEN SENSOR (FRONT)

1

2

3

4

TO ECM TO ECM

ENGINE
CONTROL
MODULE

34

4

LEFT BANK HEATED OXYGEN SENSOR (FRONT) HEATER CIRCUIT

B-14

MU802605

B-10

A-13

OFF

ON

36

FUSIBLE LINK

13Ab-84

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES

ZK603589

MFI relay

A-33X

Connector: A-33X

AA00

ZK603594

Left bank heated oxygen
sensor (front)

AA00

B-14 (B)

Connector: B-14

ZK603591

ECM

B-10 (GR)

Connector: B-10

AA00

ZK603650AA00

A-13

Connector: A-13

CIRCUIT OPERATION

｠

Power is supplied from the MFI relay (terminal No.
4) 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
energized.

｠

The ECM checks whether the heater voltage is
within a specified range when the heater is not
energized.

DESCRIPTIONS OF MONITOR METHODS

Left bank heated oxygen sensor heater (front)
current or voltage 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

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-85

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC SET CONDITION

Logic Flow Chart

Start

End

Yes

Yes

Yes

No

No

No

Malfunction

Good

Continuous

failure for 2secs

Monitoring

conditions

Current < 0.17A

or

Current > 10.5A

Voltage < 2.0V

ZK603657 AA00

Heater ON

Yes

Yes

No

Check Conditions

｠

More than 2 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.

Judgement Criterion

｠

The left bank heated oxygen sensor (front) heater
current has continued to be lower than 0.17 ampere
for 2 seconds.

Check Conditions

｠

More than 2 seconds have passed since the engine
starting sequence was completed.

｠

While the right bank heated oxygen sensor (front)
heater is off.

｠

Battery positive voltage is at between 11 and 16.5
volts.

Judgement Criterion

｠

The right bank heated oxygen sensor (front) heater
voltage has continued to be lower than 2.0 voltage
for 2 seconds.

13Ab-86

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES