Mitsubishi Outlander GS45X. Manual — part 812
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-181
.
CIRCUIT OPERATION
• 5-volt voltage is applied to the engine coolant
temperature sensor output terminal (terminal No.
1) from the ECM (terminal No. 26) via the resistor
in the ECM. The ground terminal (terminal No. 2)
is grounded with ECM (terminal No. 27).
• The engine coolant temperature sensor is a neg-
ative temperature coefficient type of resistor. It
has the characteristic that when the engine cool-
ant temperature rises the resistance decreases.
• The engine coolant temperature sensor output
voltage increases when the resistor increases
and decreases when the resistance decreases.
.
TECHNICAL DESCRIPTION
• The engine coolant temperature sensor converts
the engine coolant temperature to a voltage and
outputs it.
• The ECM checks whether this voltage is within a
specified range.
.
DESCRIPTIONS OF MONITOR METHODS
Engine coolant temperature sensor output voltage
does not change for specified period when
engine coolant temperature sensor output volt-
age at engine start is over 7
°C (45°F).
.
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
• Intake air temperature sensor
.
AK700408
AB
Engine coolant
temperature sensor
Exhaust gas
recirculation valve
B-09 (B)
Connector: B-09
AK700401AB
ECM
B-10 (GR)
Connector: B-10
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-182
DTC SET CONDITIONS
Logic Flow Chart
.
Start
End
Yes
No
No
No
Yes
Yes
Malfunction
Good
Ta >= 300secs
Td >= 30secs
|dT| < 1˚C (1.8˚F)
Monitoring conditions?
Start measuring the minimum and maximum
temperature from engine start
Calculate the difference of the minimum and
the maximum temperature from engine start; dT
Yes
No
AK800937
Accumulate time in acceleration; Ta
Accumulate time in deceleration; Td
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-183
Check Conditions
• Engine coolant temperature was more than 7°C
(45
°F) when the engine started.
• The accumulation is more than 300 seconds dur-
ing the acceleration having the mass airflow rate
of 12 g/sec or more.
• The accumulation is more than 30 seconds dur-
ing the deceleration having the mass airflow rate
of 9 g/sec or less.
Judgement Criterion
• Engine coolant temperature fluctuates within 1°C
(1.8
°F) after 330 seconds have passed since the
engine was started.
• However, time is not counted if any of the follow-
ing conditions are met.
1. Intake air temperature is 60
°C (140°F) or
more.
2. During fuel shut-off operation.
.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function
− OBD-II Drive Cycle −
Pattern 9
.
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are: )
• Engine coolant temperature sensor failed.
• ECM failed.
DIAGNOSIS
Required Special Tools:
• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
• MB991824: V.C.I.
• MB991827: USB Cable
• MB991910: Main Harness A
STEP 1. Using scan tool MB991958, check data list item 6:
Engine Coolant Temperature Sensor.
CAUTION
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991958 to the data reading mode for item
6, Engine Coolant Temperature Sensor.
• The engine coolant temperature and temperature
shown with the scan tool should approximately match.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES : 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
.
NO : Go to Step 2.
AK700568AB
MB991824
MB991827
MB991910
Data link
connector
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-184
STEP 2. 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, measure
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 normal?
YES : Replace the engine coolant temperature sensor. Then
go to Step 3.
NO : Go to Step 3.
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 9
(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0116 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
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