Mitsubishi Outlander GS45X. Manual — part 813
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-185
DTC P0117: Engine Coolant Temperature Circuit Low Input
.
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 resistance increases
and decreases when the resistance decreases.
.
AK700136
1 2
1 2
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
B-09
(MU802406)
B-10
ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT
ENGINE COOLANT
TEMPERATURE SENSOR
2
27
1
26
AB
YELLO
W
-BLUE
YELLO
W
-GREEN
5 V
ENGINE
CONTROL
MODULE
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-186
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 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
.
DTC SET CONDITIONS
Logic Flow Chart
.
Output voltage > 4.6V
Output voltage < 0.1V
End
No
No
No
Malfunction
Good
No
AK604317
Start
Yes
Yes
Yes
Yes
Continuous
failure for 2secs
Monitoring
conditions
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-187
Check Condition
• 2 seconds or more have passed since the engine
starting sequence was completed.
Judgement Criterion
• Engine coolant temperature sensor output volt-
age has continued to be 0.1 volt or lower for 2
seconds.
.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function
− OBD-II Drive Cycle −
Pattern 22
.
TROUBLESHOOTING HINTS (The most
likely causes for this code to be set are:)
• Engine coolant temperature sensor failed.
• Connector damage
• Harness damage
• 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.
STEP 2. Check harness connector B-09 at the engine
coolant temperature sensor and harness connector B-10
at the ECM for damage.
Q: Is the harness connector in good condition?
YES : Go to Step 3.
NO : Repair it. Refer to GROUP 00E, Harness Connector
Inspection
P.00E-2
. Then go to Step 5.
AK700568AB
MB991824
MB991827
MB991910
Data link
connector
MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
TSB Revision
MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>
13B-188
STEP 3. Check for short circuit to ground between the
engine coolant temperature sensor connector B-09 and
the ECM connector B-10.
(1) Disconnect the engine coolant temperature sensor B-09
and the ECM connector B-10.
(2) Check for the continuity between the engine coolant
temperature sensor B-09 (terminal No. 1) and ground.
• Not continuity.
Q: Is the harness wire in good condition?
YES : Go to Step 4.
NO : Repair it. Then go to Step 5.
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 : Replace the engine coolant temperature sensor. Then
go to Step 5.
NO : Go to Step 5.
AK703872
1
2
B-09 harness
connector:
component side
AB
AK700231
AK700232 AB
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