Mitsubishi Outlander XL. Manual - part 264

DTC SET CONDITIONS

Logic Flow Chart

Yes

Yes

No

No

No

No

No

No

No

Monitoring

condition

Yes

Yes

Yes

F1 = 1

F1 = 1

F2 = F2 + 1, F1 = 0

F1 = F2 = 0

Good

Continuous fuel cut > 2secs

Vehicle speed > 30km/h

Vehicle speed < 1.5m/h

Yes

Yes

ZK603721AA00

Engine speed > 1500rpm

End

End

Start

F2 >= 3

Malfunction

Yes

Yes

Load valve > 40%

No

Have 10secs passed?

Yes

No

No

Output voltage 

change < 0.313V

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-251

DIAGNOSTIC TROUBLE CODE PROCEDURES

Check Conditions

｠

Engine  coolant  temperature  is  higher  than  76°C
(169°F).

｠

The  center  exhaust  pipe  heated  oxygen  sensor
(front) is active.

｠

The cumulative mass airflow sensor output is higher
than 2,900 g.

｠

Repeat 3 or more times: drive*1, stop*2.

Drive*1:

｠

Engine speed is higher than 1,500 r/min.

｠

Volumetric  efficiency  is  higher  than  40
percent.

｠

Vehicle speed is higher than 30 km/h (19
mph).

｠

A  total  of  more  than  10  seconds  have
elapsed  with  the  above  mentioned
conditions, and more than 2 seconds have
elapsed with the fuel shut off.

Stop*2:

｠

Vehicle speed is lower than 1.5 km/h (1.0
mph).

Judgement Criterion

｠

Change in the output voltage of the center exhaust
pipe heated oxygen sensor is lower than 0.313 volt.

NOTE: 

Monitoring stops after fuel has been shut

off for more than 38 seconds.

OBD-II DRIVE CYCLE PATTERN

Refer to Diagnostic Function - OBD-II Drive Cycle -
Pattern 13 P.13Ab-8.

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

｠

Center exhaust pipe heated oxygen sensor 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

STEP 1. Using scan tool MB991958, check data list item AD:
Heated Oxygen Sensor Bank 1, Sensor 3 (center exhaust
pipe).

ZC501967

AC404789

ZC5019680000

MB991824

MB991827

MB991910

Data link

connector

To prevent damage to scan tool MB991958, always turn the
ignition  switch  to  the  "LOCK"  (OFF)  position  before
connecting 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 data reading mode for item
B1, Heated Oxygen Sensor Bank 1, Sensor 3 (center exhaust
pipe).

a
.

Transaxle: 2nd speed

b
.

Drive with wide open throttle

c
.

Engine: 3,500 r/min

｠

The output voltages should be between 0.6 and 1.0
volt.

(4)

Turn the ignition switch to the "LOCK" (OFF) position.

Q:Is the sensor operating properly?

13Ab-252

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES

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. Test the OBD-II drive cycle.

(1)

Replace  the  center  exhaust  pipe  heated  oxygen  sensor.
When  the  center  exhaust  pipe  heated  oxygen  sensor  is
replaced, carry out a test drive with the drive cycle pattern.
Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern
13 P.13Ab-8.

(2)

Check the diagnostic trouble code (DTC).

Q:Is DTC P0146 set?

YES:

 Refer to, P0143 - Heated Oxygen Sensor Circuit Low

Voltage (bank 1, sensor 3) P.13Ab-235, DTC P0144 - Heated
Oxygen Sensor Circuit High Voltage (bank 1, sensor 3) P.
13Ab-240.

NO:

 The inspection is complete.

DTC P0151: Heated Oxygen Sensor Circuit Low Voltage (bank 2, sensor 1)

M11310100194USA0000010000

ZK602840

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

0.5 V

2

1

4

3

AA00

ENGINE
CONTROL
MODULE

LEFT BANK HEATED
OXYGEN SENSOR (FRONT)

FROM MFI RELAY

TO ECM

1

2

3

4

39

RED

SKY BLUE

38

LEFT BANK HEATED OXYGEN SENSOR (FRONT) CIRCUIT

B-10

B-14

MU802605

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-253

DIAGNOSTIC TROUBLE CODE PROCEDURES

ZK603594

Left bank heated oxygen
sensor (front)

AA00

B-14 (B)

Connector: B-14

ZK603591

ECM

B-10 (GR)

Connector: B-10

AA00

 

CIRCUIT OPERATION

｠

A  voltage  corresponding  to  the  oxygen
concentration in the exhaust gas is sent to the ECM
(terminal No. 38) from the output terminal (terminal
No. 4) of the left bank heated oxygen sensor (front).

｠

Terminal  No.  2  of  the  left  bank  heated  oxygen
sensor  (front)  is  grounded  with  or  ECM  (terminal
No. 39).

｠

The  ECM  applies  an  offset  voltage  of  0.5  volt  to
terminal No. 2 of the left bank heated oxygen sensor
(front).

TECHNICAL DESCRIPTION

｠

The left bank heated oxygen sensor (front) detects
the concentration of oxygen in the exhaust gas; it
converts  that  data  to  voltage,  and  sends  it  to  the
ECM.

｠

When  the  left  bank  heated  oxygen  sensor  (front)
begins  to  deteriorate,  the  heated  oxygen  sensor
signal response deteriorates also.

｠

The  ECM  also  checks  for  the  left  bank  heated
oxygen sensor (front) output voltage.

DESCRIPTIONS OF MONITOR METHODS
The  left  bank  heated  oxygen  sensor  (front)  output
voltage is under 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)

｠

Heated oxygen sensor heater (front) monitor

｠

Misfire monitor

｠

Fuel system monitor

Sensor (The sensor below is determined to be
normal)

｠

Mass airflow sensor

｠

Engine coolant temperature sensor

｠

Intake air temperature sensor

｠

Barometric pressure sensor

｠

Throttle position sensor

｠

Accelerator pedal position sensor

13Ab-254

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES