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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

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

YELLO

-BLUE

YELLO

-GREEN

5 V

ENGINE
CONTROL
MODULE

AK700408

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

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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

Malfunction

Good

AK604317

Start

Yes

Continuous

failure for 2secs

Monitoring
conditions

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

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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

P.13B-11

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

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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:

− 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

B-09 harness
connector:
component side

AK700231

AK700232 AB

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