Mitsubishi Outlander XL. Manual — part 242
DTC P0117: Engine Coolant Temperature Circuit Low Input
M11310100180USA0000010000
ZK602836
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
YELLO
W
-GREEN
YELLO
W
-BLUE
ENGINE
CONTROL
MODULE
ENGINE COOLANT
TEMPERATURE SENSOR
B-09
(MU802406)
B-10
ENGINE COOLANT TEMPERATURE SENSOR CIRCUIT
2
27
1
26
AA00
5V
ZK603598
Engine coolant
temperature sensor
AA00
Exhaust gas
recirculation valve
B-09 (B)
Connector: B-09
ZK603591
ECM
B-10 (GR)
Connector: B-10
AA00
MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>
13Ab-163
DIAGNOSTIC TROUBLE CODE PROCEDURES
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
negative temperature coefficient type of resistor. It
has the characteristic that when the engine coolant
temperature rises the resistance decreases.
⦆
The engine coolant temperature sensor output
voltage increases when the resistance 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
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
13Ab-164
MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>
DIAGNOSTIC TROUBLE CODE PROCEDURES
DTC SET CONDITIONS
Logic Flow Chart
Start
Output voltage > 4.6V
Output voltage < 0.1V
End
No
No
No
Yes
Yes
Yes
Malfunction
Good
Continuous
failure for 2secs
Monitoring
conditions?
No
Yes
ZK603698 AA00
Check Condition
⦆
2 seconds or more have passed since the engine
starting sequence was completed.
Judgement Criterion
⦆
Engine coolant temperature sensor output voltage
has continued to be 0.1 volt or lower [corresponding
to coolant temperature of 140°C (284°F) or higher]
for 2 seconds.
OBD-II DRIVE CYCLE PATTERN
Refer to Diagnostic Function - OBD-II Drive Cycle -
Pattern 24 P.13Ab-8.
TROUBLESHOOTING HINTS (The most likely
causes for this code to be set are:)
⦆
Engine coolant temperature sensor failed.
⦆
Connector damage
⦆
Harness damage
⦆
ECM failed.
MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>
13Ab-165
DIAGNOSTIC TROUBLE CODE PROCEDURES
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.
ZC501967
AC404789
ZC5019680000
MB991824
MB991827
MB991910
Data link
connector
To prevent damage to scan tool MB991958, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting 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.
STEP 3. Check for open circuit to ground between the
engine coolant temperature sensor connector B-09 and the
ECM connector B-21.
(1)
Disconnect the engine coolant temperature sensor B-09 and
the ECM connector B-10.
13Ab-166
MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>
DIAGNOSTIC TROUBLE CODE PROCEDURES
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