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
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