Mitsubishi Outlander GS45X. Manual — part 909
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-569
STEP 5. Check the EGR valve operation using special tool
MB991658.
(1) Remove the EGR valve.
(2) Connect special tool MB991658 to the EGR valve. (All
terminals should be connected.)
(3) Use the jumper wires to connect terminal No. 2 of the EGR
valve connector to the positive battery terminal.
(4) Check to ensure that the motor operates when the terminal
No. 1 and No. 3 of the EGR valve connector are
respectively connected to the negative battery terminal
using a jumper wire.
• Vibration should be present at each application of volt-
age to test clip combination.
(5) Then, use jumper wires to connect the terminal No. 5 of the
EGR valve connector to the positive battery terminal.
(6) Check to ensure that the motor operates when terminal No.
4 and No. 6 of the EGR valve connector are respectively
connected to the negative battery terminal using a jumper
wire.
• Vibration should be present at each application of volt-
age to test clip combination.
(7) Reinstall the EGR valve, using a new gasket, and tighten to
the specified torque.
Tighten torque: 23
± 6 N⋅m [17 ± 4 ft⋅Ib]
Q: Is the EGR valve operating properly?
YES : Replace the ECM. When the ECM is replaced,
register the ID code. Refer to GROUP 42B, Diagnosis
− ID Codes Registration Judgment Table <Vehicles
or GROUP 42C, Diagnosis
− ID
Codes Registration Judgment Table <Vehicles with
WCM>
NO : Replace the EGR valve. Then go to Step 6.
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 3
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0489 set?
YES : Retry the troubleshooting.
NO : The inspection is complete.
AK700068
MB991658
Battery
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-570
DTC P0490: EGR Value (Stepper Motor) Circuit Malfunction (Battery Short)
1
2 3
4
5 6
AK700165
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
3
2
4
1
10 111213 14 1516 17 1819 20
2 3 4
5 6 7 8 9
1
3
4
6
31
32
47
48
B-12
(MU802056)
B-10
20A
WHITE
WHITE
WHITE
WHITE
RED
GRA
Y
-BLUE
SKY BLUE
LIGHT GREEN
WHITE
A-33X
4
3
1
2
22
OFF
ON
AB
EGR VALVE CIRCUIT
EXHAUST GAS
RECIRCULATION
(EGR) VALVE
36
FUSIBLE LINK
4
2
5
A-13
RELAY BOX
(ENGINE COMPARTMENT)
TO ECM
ENGINE CONTROL MODULE
MFI
RELAY
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-571
.
CIRCUIT OPERATION
• The EGR valve power is supplied from the MFI
relay (terminal No. 2).
• The ECM (terminals No. 31, No. 32, No. 47, No.
48) drives the stepper motor by sequentially turn-
ing "ON" the power transistors in the ECM and
providing ground to the EGR valve (terminal No.
1, No. 3, No. 4, No. 6).
.
TECHNICAL DESCRIPTION
The ECM checks whether a short circuit to the power
supply exists or not by measuring the EGR valve
(stepper motor) drive circuit voltage when the current
not flowing through the coils of the EGR valve (step-
per motor).
.
DESCRIPTIONS OF MONITOR METHODS
When the EGR valve (stepper motor) drive circuit
voltage is over the specified range, it is judged that a
malfunction exists.
.
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)
• EGR stepper motor monitor
Sensor (The sensor below is determined to be
normal)
• Mass airflow sensor
• Engine coolant temperature sensor
• Intake air temperature sensor
• Barometric pressure sensor
• Manifold absolute pressure sensor
• Accelerator pedal position sensor
.
AK700432
AB
Exhaust gas
recirculation valve
B-12 (GR)
Connector: B-12
AK700401AB
ECM
B-10 (GR)
Connector: B-10
AK700399AB
MFI relay
A-33X
Connector: A-33X
AK900602
Connector: A-13
A-13
AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-572
DTC SET CONDITIONS
Logic Flow Chart
.
Check Conditions
• Ignition switch is "ON" position.
• Battery positive voltage is at between 10 and
16.5 volts.
Judgement Criterion
• When the EGR valve is energized, the ECM volt-
age should be 6.7 volts or more for 1.4 seconds.
.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function
− OBD-II Drive Cycle −
Pattern 3
.
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are: )
• EGR valve (stepper motor) failed.
• Harness damage.
• Connector damage.
• ECM failed.
End
Malfunction
Good
No
No
No
No
No
Stepper motor activation
command ON?
AK900363
Start
Yes
Yes
Yes
Yes
Yes
Continuous
failure for 1.4secs
Monitoring
conditions
Circuit voltage
>
6.7V
Circuit voltage
< 1.5V
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