Mitsubishi Outlander GS45X. Manual — part 821
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-217
STEP 3. Check for harness between the engine coolant
temperature sensor connector B-09 and the ECM
connector B-10.
(1) Disconnect the engine coolant temperature sensor
connector B-09 and the ECM connector B-10.
(2) Measure the resistance between the engine coolant
temperature sensor connector B-09 and the ECM
connector B-10.
a. Connector B-09 (terminal No. 1) and Connector B-10
(terminal No. 26).
b. Connector B-09 (terminal No. 2) and Connector B-10
(terminal No. 27).
• Should be less than 2 ohms.
Q: Is the harness wire in good condition?
YES : Go to Step 4.
NO : Repair it. Then go to Step 5.
AK700234
1
2
16 15 14 13 12 11 10 9 8 7 6 5 4 3
2
1
32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17
48 47 46 45 44 43 42 41 40 39 38 37 36 35 34 33
64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 49
AB
B-09 harness
connector:
component side
B-10 harness
connector:
component side
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-218
STEP 4. Check the engine coolant temperature sensor.
(1) Disconnect the engine coolant temperature sensor
connector B-09.
(2) Remove the engine coolant temperature sensor.
(3) With the temperature sensing portion of engine coolant
temperature sensor immersed in hot water, check
resistance.
Standard value:
14
− 17 kΩ [at −20°C (−4°F)]
5.1
− 6.5 kΩ [at 0°C (32°F)]
2.1
− 2.7 kΩ [at 20°C (68°F)]
0.9
− 1.3 kΩ [at 40°C (104°F)]
0.48
− 0.68 kΩ [at 60°C (140°F)]
0.26
− 0.36 kΩ [at 80°C (176°F)]
(4) Apply 3M
™ AAD part number 8731 or equivalent on the
screw section of the engine coolant temperature sensor.
(5) Install the engine coolant temperature sensor, and tighten
to the specified torque.
Tightening torque: 29
± 10 N⋅m (22 ± 7 ft-lb)
Q: Is the measured resistance at the standard value?
YES : Go to Step 5.
NO : Replace the engine coolant temperature sensor. Then
go to Step 5.
STEP 5. 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 9
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0125 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
.
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
.
AK700231
AK700232 AB
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-219
DTC P0128: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
.
TECHNICAL DESCRIPTION
• The ECM checks the time for the cooling water
temperature to reach the judgment temperature.
.
DESCRIPTIONS OF MONITOR METHODS
Engine coolant temperature does not reach 77
°C
(171
°F) within specified period after cold start.
.
MONITOR EXECUTION
Once per driving cycle
.
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)
• Mass airflow sensor
• Engine coolant temperature sensor
• Intake air temperature sensor
.
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-220
DTC SET CONDITIONS
Logic Flow Chart
.
Check Conditions
• Engine coolant temperature is between −10°C
(14
°F) and 60°C (140°F) when the engine is
started.
• Intake air temperature is −10°C (14°F) or higher.
• The intake air temperature when the engine is
started
− intake air temperature is 10°C (18°F) or
less.
• The total time when the amount of intake air is
small is less than the specified time.
Judgement Criterion
• After the estimated engine coolant temperature
rises above 77
°C (171°F), the actual engine cool-
ant temperature is less than 77
°C (171°F) even
though the specified time has passed.
.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function
− OBD-II Drive Cycle −
Pattern 10
.
TROUBLESHOOTING HINTS
(The most likely causes for this code to be set are:)
• The engine cooling system is faulty.
• ECM failed.
End
Yes
Malfunction
Estimate engine coolant temp.
Good
Specified time has passed?
No
No
Monitoring
conditions
Actual engine coolant
temp. >= 77˚C (171˚F)
Estimated engine coolant
temp. >= 77˚C (171˚F)
No
AK900356
Start
Yes
No
Yes
YES
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