Mitsubishi Outlander XL. Manual - part 274

DTC SET CONDITION

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-291

DIAGNOSTIC TROUBLE CODE PROCEDURES

Check Conditions

｠

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

｠

The left bank heated oxygen sensor (front) is active.

｠

The cumulative mass airflow sensor output is higher
than 1,638 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 left bank heated
oxygen sensor (rear) 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: )

｠

Left bank heated oxygen sensor (rear) deteriorated.

｠

ECM failed.

 

DIAGNOSIS

STEP 1. Using scan tool MB991958, check data list item AF:
Heated Oxygen Sensor Bank 2, Sensor 2 (left rear).

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
AF, Heated Oxygen Sensor Bank 1, Sensor 3 (left rear).

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?

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:

 Replace the left bank heated ogygen sensor (rear).

Go to Step 2.

13Ab-292

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES

STEP 2. 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  13  P.
13Ab-8.

(2)

Check the diagnostic trouble code (DTC).

Q:Is DTC P0160 set?

YES:

 Refer to, P0157 - Heated Oxygen Sensor Circuit Low

Voltage (bank 2, sensor 2) P.13Ab-275, DTC P0158 - Heated
Oxygen Sensor Circuit High Voltage (bank 2, sensor 2) P.
13Ab-280.

NO:

 The inspection is complete.

DTC P0171: System too Lean (bank 1)

M11310100202USA0000010000

Fuel Trim Circuit

｠

Refer to DTC P0201- Injector Circuit - Cylinder 1 P.
13Ab-332,  P0203-  Injector  Circuit  -  Cylinder  3  P.
13Ab-347,  P0205-  Injector  Circuit  -  Cylinder  5  P.
13Ab-362.

CIRCUIT OPERATION

｠

Refer to DTC P0201 - Injector Circuit - Cylinder 1 P.
13Ab-332,  P0203-  Injector  Circuit  -  Cylinder  3  P.
13Ab-347,  P0205-  Injector  Circuit  -  Cylinder  5  P.
13Ab-362.

TECHNICAL DESCRIPTION

｠

If a malfunction occurs in the fuel system, the fuel
trim value becomes too large.

｠

The  ECM  checks  whether  the  fuel  trim  value  is
within a specified range.

DESCRIPTIONS OF MONITOR METHODS
Right bank air/fuel learning value (long time fuel trim)
and  air/fuel  feedback  integral  value  (short  time  fuel
trim) are too lean.

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)

｠

Misfire 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

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-293

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC SET CONDITIONS

Logic Flow Chart

K

L rn

: Long-te rm  trim

K

I

: Sho rt-te rm  trim

K0

: Maxi m um  limit  of  long-te rm  trim

K1

: Maxi m um  limit  of  sho rt-te rm  trim

K2

: Mini m um  limit  of  long-te rm  trim

K3

: Mini m um  limit  of  sho rt-te rm  trim

Start

Monitoring

conditions

End

No

No

No

No

No

No

Yes

Yes

Yes

Yes

Yes

Yes

K

L rn

> K0

Malfunction

Good

K

L rn

< K

2

K

I

< K

3

K

I

> K

1

Conti nuous  failur e

for  2sec s

ZK603728 AA00

Check Conditions

｠

Engine  coolant  temperature  is  lower  than  100°C
(212°F) when the engine is started.

｠

Intake air temperature is lower than 60°C (140°F)
when the engine is started.

｠

Under the closed loop air/fuel ratio control.

｠

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

｠

Mass airflow sensor output is 12 g/sec or more.

Judgement Criteria

｠

Long-term fuel trim has continued to be higher than
+12.5 percent for 5 seconds.

or

｠

Short-term fuel trim has continued to be higher than
+7.4 percent for 5 seconds.

Check Conditions

｠

Engine  coolant  temperature  is  lower  than  100°C
(212°F) when the engine is started.

｠

Intake air temperature is lower than 60°C (140°F)
when the engine is started.

13Ab-294

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES