Mitsubishi Outlander GS45X. Manual — part 784
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-69
STEP 6. 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
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0031 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-70
DTC P0032: Heated Oxygen Sensor Heater Circuit High (bank 1, sensor 1)
AK700128
1
3
2
4
2
1
4
3
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
20A
WHITE
GRA
Y
WHITE
WHITE
WHITE
A-33X
MFI
RELAY
RELAY BOX
(ENGINE COMPARTMENT)
4
3
1
2
22
TO ECM
36
FUSIBLE LINK
AB
1
2
3
4
TO ECM TO ECM
ENGINE
CONTROL
MODULE
33
4
B-03
MU802665
B-10
A-13
OFF
ON
RIGHT BANK HEATED OXYGEN SENSOR (FRONT) HEATER CIRCUIT
RIGHT BANK HEATED
OXYGEN SENSOR (FRONT)
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-71
.
CIRCUIT OPERATION
• Power is supplied from the MFI relay (terminal
No. 2) to the right bank heated oxygen sensor
(front) heater.
• The ECM (terminal No. 33) controls continuity to
the right 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 ener-
gized.
.
DESCRIPTIONS OF MONITOR METHODS
Right bank heated oxygen sensor heater (front) cur-
rent 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
.
AK700399AB
MFI relay
A-33X
Connector: A-33X
AK700401AB
ECM
B-10 (GR)
Connector: B-10
AK900129 AD
Right bank heated
oxygen sensor (front)
Front exhaust
pipe RH
B-03 (GR)
Connector: B-03
AK900602
Connector: A-13
A-13
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-72
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 (front)
heater is on.
• Battery positive voltage is between 11 and 16.5
volts.
Judgement Criterion
• The right bank heated oxygen sensor (front)
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
.
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are: )
• Right bank heated oxygen sensor (front) heater.
• 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
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