Mitsubishi Montero Sport (2004+). Manual — part 190
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-173
STEP 10. Check for harness damage between engine
coolant temperature sensor connector A-67 (terminal No.
2) and PCM connector C-90 (terminal No. 57).
NOTE: Check harness after checking intermediate connector
C-71. If intermediate connector is damaged, repair or replace it.
Refer to GROUP 00E, Harness Connector Inspection
.
Then go to Step 14.
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then go to Step 14.
NO : Repair it. Then go to Step 14.
AK104023
1
2
A-67(B)
AB
CONNECTOR: A-67
HARNESS
CONNECTOR:
COMPONENT SIDE
AK103762
42
43
48
49
50
51
52
53
54
55
56
57
46 45 44
58
59
60
61
62
63
64
65
66
47
41
AB
CONNECTOR: C-90
C-90(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-174
STEP 11. Check the engine coolant temperature sensor.
(1) Disconnect the engine coolant temperature sensor
connector A-67.
(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 resistance at the standard value?
YES : Go to Step 12.
NO : Replace the engine coolant temperature sensor. Then
go to Step 14.
STEP 12. Check connector C-90 at PCM for damage.
Q: Is the connector in good condition?
YES : Go to Step 13.
NO : Repair or replace it. Refer to GROUP 00E, Harness
Connector Inspection
. Then go to Step 14.
AK104023
1
2
A-67(B)
AB
CONNECTOR: A-67
HARNESS
CONNECTOR:
COMPONENT SIDE
AKX01622
AKX01623 AB
AK103762
42
43
48
49
50
51
52
53
54
55
56
57
46 45 44
58
59
60
61
62
63
64
65
66
47
41
AB
CONNECTOR: C-90
C-90(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-175
STEP 13. Check for harness damage between engine
coolant temperature sensor connector A-67 (terminal No.
1) and PCM connector C-90 (terminal No. 44).
Q: Is the harness wire in good condition?
YES : Replace the PCM. Then go to Step 14.
NO : Repair it. Then go to Step 14.
STEP 14. 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 − Procedure 6 −
Other Monitor
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0125 set?
YES : Repeat the troubleshooting.
NO : The procedure is complete.
AK104023
1
2
A-67(B)
AB
CONNECTOR: A-67
HARNESS
CONNECTOR:
COMPONENT SIDE
AK103762
42
43
48
49
50
51
52
53
54
55
56
57
46 45 44
58
59
60
61
62
63
64
65
66
47
41
AB
CONNECTOR: C-90
C-90(GR)
HARNESS CONNECTOR:
COMPONENT SIDE
Continue
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI)
13A-176
13A
DTC P0128: Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)
.
TECHNICAL DESCRIPTION
• The PCM 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)
• Volume airflow sensor
• Engine coolant temperature sensor
• Intake air temperature sensor
.
DTC SET CONDITIONS
Logic Flow Chart
.
START
END
YES
NO
NO
YES
MALFUNCTION
GOOD
TIME HAVE PASSED
AFTER STARTING?*
ENGINE COOLANT TEMP.
>=77˚C (171˚F)
*: See DTC SET CONDITIONS-JUDGMENT CRITERIA
MONITORING
CONDITIONS?
NO
YES
AK302371
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