Mitsubishi Outlander XL. Manual - part 242

DTC P0117: Engine Coolant Temperature Circuit Low Input

M11310100180USA0000010000

ZK602836

1 2

1 2

1

2

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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