Mitsubishi Outlander GS45X. Manual — part 796
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-117
DIAGNOSIS
Required Special Tool:
• MB991316: Test Harness
STEP 1. Check the left bank heated oxygen sensor (rear).
(1) Disconnect left bank heated oxygen sensor (rear) connector
B-13 and connect test harness special tool, MB991316, to
the connector on the left bank heated oxygen (rear) sensor
side.
(2) Measure the resistance between heated oxygen sensor
connector terminal No. 1 (red clip) and terminal No. 3 (blue
clip).
Standard value: 11
− 18 Ω [at 20°C (68°F)]
Q: Is the measured resistance between 11 and 18 ohms [at
20
°C (68°F)]?
YES : Go to Step 2.
NO : Replace the left bank heated oxygen sensor (rear).
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
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0058 set?
YES : Replace the ECM. When the ECM is replaced,
register the ID code. Refer to GROUP 42B, Diagnosis
− ID Codes Registration Judgment Table <Vehicles
with KOS>
P.42B-15
or GROUP 42C, Diagnosis
− ID
Codes Registration Judgment Table <Vehicles with
WCM>
P.42C-10
. 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
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0058 set?
YES : Retry the troubleshooting.
NO : he inspection is complete.
AK700175
Heated
oxygent
sensor
component
side
connector
MB991316
Red
Blue
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-118
DTC P0059: Heated Oxygen Sensor Heater Resistance (bank 2, sensor 1)
AK700131
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
AB
20A
WHITE
BLUE
WHITE
WHITE
WHITE
A-33X
4
3
1
2
22
1
2
3
4
34
4
B-14
MU802605
B-10
A-13
OFF
ON
36
FUSIBLE LINK
RELAY BOX
(ENGINE COMPARTMENT)
TO ECM
TO ECM TO ECM
ENGINE
CONTROL
MODULE
LEFT BANK HEATED OXYGEN SENSOR (FRONT) HEATER CIRCUIT
LEFT BANK HEATED
OXYGEN SENSOR (FRONT)
MFI
RELAY
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-119
.
CIRCUIT OPERATION
• Power is supplied from the MFI relay (terminal
No. 2) 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 ener-
gized.
.
DESCRIPTIONS OF MONITOR METHODS
Left bank heated oxygen sensor heater (front) cur-
rent 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
AK700404
Left bank heated oxygen
sensor (front)
Connector: B-14
AB
B-14 (B)
AK700401AB
ECM
B-10 (GR)
Connector: B-10
AK900602
Connector: A-13
A-13
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-120
DTC SET CONDITION
Logic Flow Chart
.
Check Conditions
• More than 60 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.
• Intake air temperature is more than −10°C (14°F).
• On duty cycle of the left bank heated oxygen sen-
sor (front) heater is between 3 and 97 percent.
Judgement Criterion
• The left bank heated oxygen sensor (front) heater
current has continued to be lower than average
0.6 ampere for 10 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: )
• Left bank heated oxygen sensor (front) heater
failed.
• Connector damage.
• Harness damage
• ECM failed.
DIAGNOSIS
Required Special Tools:
• MD998464: Test Harness
End
No
No
No
Malfunction
Good
Heater current
< 0.6 A
AKA00341
Start
Yes
Yes
Yes
Continuous
failure for 10secs
Monitoring
conditions
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