Mitsubishi Outlander GS45X. Manual — part 989

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-889

ENGINE COOLANT TEMPERATURE SENSOR
CHECK

M1131003101963

Required Special Tools:

• MB992042: Engine coolant temperature sensor wrench

CAUTION

Be careful not to touch the connector (resin section) with
the tool when removing and installing.
1. Drain engine coolant, then remove the engine coolant

temperature sensor using the special tool MB992042
(engine coolant temperature sensor wrench).

2. With the temperature sensing portion of engine coolant

temperature sensor immersed in hot water, check the
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)]

3. If resistance deviates from the standard value greatly,

replace the sensor.

4. Apply 3M

™ AAD part number 8731 or equivalent to threaded

portion.

5. With the special tool MB992042 (engine coolant

temperature sensor wrench) tighten the engine coolant
temperature sensor to the specified torque.

Tightening torque: 30

± 9 N⋅m (22 ± 7 ft-lb)

HEATED OXYGEN SENSOR CHECK

M1131005002824

Required Special Tools:

• MB991958: Scan tool (M.U.T.-III Sub Assembly)

• MB991824: V.C.I.

• MB991827: USB Cable

• MB991910: Main Harness A

• MB991316: Test Harness

• MD998464: Test Harness

• MB991658: Test Harness

.

AK503116 AC

MB992042

AK700099

AK700100AB

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-890

Right bank heated oxygen sensor (front)

1. Disconnect the heated oxygen sensor connector and

connect special tool MB991316 to the connector on the
heated oxygen sensor side.

2. Measure the resistance between terminal No. 1 (red clip)

and terminal No. 3 (blue clip) on the heated oxygen sensor
connector.

Standard value: 4.5

− 8.0 Ω [at 20 °C (68 °F)]

3. If the resistance deviates from standard value, replace the

heated oxygen sensor.

4. Warm up the engine until engine coolant is 80

°C (176°F) or

higher.

5. Rev the engine for 5 minutes or more with the engine speed

of 2,000 r/min.

6. Connect a digital voltage meter between terminal No. 2

(black clip) and terminal No. 4 (white clip).

7. While repeatedly revving the engine, measure the heated

oxygen sensor output voltage.

Standard value:

CAUTION

• Be very careful when connecting the jumper wire;

incorrect connection can damage the oxygen sensor.

• Be careful the heater is broken when voltage of beyond

8V is applied to the oxygen sensor heater.

NOTE: If the temperature of sensing area does not reach
the high temperature [of approximately 400

°

C (752

°

F) or

more] even though the oxygen sensor is normal, the output
voltage would be possibly low in spite of the rich air-fuel
ratio. Therefore, if the output voltage is low, use a jumper
wire to connect terminal No. 1 (red clip of special tool) and
terminal No. 3 (blue clip of special tool) of the oxygen sensor
with a (+) terminal and (

−

) terminal of 8 V power supply

respectively, then check again.

8. If the output voltage is not within the standard value, replace

the heated oxygen sensor.
NOTE: For removal and installation of the heated oxygen
sensor, refer to GROUP 15, Exhaust Manifold

−

Removal

and Installation

P.15-18

.

ENGINE

HEATED OXYGEN
SENSOR OUTPUT
VOLTAGE

REMARKS

When
revving
engine

0.6

− 1.0 V

If you make the
air/fuel ratio rich
by revving the
engine repeatedly,
a normal heated
oxygen sensor will
output a voltage of
0.6

− 1.0 V.

AK7000101AB

MB991316

Blue

Red

Heated oxygen
sensor component
side connector

AK700102

MB991316

White

Black

AB

Heated oxygen
sensor component
side connector

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-891

.

Left bank heated oxygen sensor (front)

1. Disconnect the heated oxygen sensor connector and

connect special tool MD998464 to the connector on the
heated oxygen sensor side.

2. Measure the resistance between terminal No. 1 (red clip)

and terminal No. 3 (blue clip) on the heated oxygen sensor
connector.

Standard value: 4.5

− 8.0 Ω [at 20 °C (68 °F)]

3. If the resistance deviates from standard value, replace the

heated oxygen sensor.

4. Warm up the engine until engine coolant is 80

°C (176°F) or

higher.

5. Rev the engine for 5 minutes or more with the engine speed

of 2,000 r/min.

6. Connect a digital voltage meter between terminal No. 2

(black clip) and terminal No. 4 (white clip).

7. While repeatedly revving the engine, measure the heated

oxygen sensor output voltage.

Standard value:

CAUTION

• Be very careful when connecting the jumper wire;

incorrect connection can damage the oxygen sensor.

• Be careful the heater is broken when voltage of beyond

8V is applied to the oxygen sensor heater.

NOTE: If the temperature of sensing area does not reach
the high temperature [of approximately 400

°

C (752

°

F) or

more] even though the oxygen sensor is normal, the output
voltage would be possibly low in spite of the rich air-fuel
ratio. Therefore, if the output voltage is low, use a jumper
wire to connect terminal No. 1 (red clip of special tool) and
terminal No. 3 (blue clip of special tool) of the oxygen sensor
with a (+) terminal and (

−

) terminal of 8 V power supply

respectively, then check again.

8. If the output voltage is not within the standard value, replace

the heated oxygen sensor.

ENGINE

HEATED
OXYGEN
SENSOR
OUTPUT
VOLTAGE

REMARKS

When revving
engine

0.6

− 1.0 V

If you make the
air/fuel ratio rich
by revving the
engine repeatedly,
a normal heated
oxygen sensor will
output a voltage of
0.6

− 1.0 V.

AK700103AB

MD998464

Blue

Red

Heated oxygen
sensor component
side connector

AK700104

MD998464

White

Black

AB

Heated oxygen
sensor component
side connector

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-892

NOTE: For removal and installation of the heated oxygen
sensor, refer to GROUP 15, Exhaust Manifold

−

Removal

and Installation

P.15-18

.

.

Right bank heated oxygen sensor (rear)

1. Disconnect the heated oxygen sensor connector and

connect special tool MD998464 to the connector on the
heated oxygen sensor side.

2. Measure the resistance between terminal No. 1 (red clip)

and terminal No. 3 (blue clip) on the heated oxygen sensor
connector.

Standard value: 11

− 18 Ω [at 20 °C (68 °F)]

3. If the resistance deviates from standard value, replace the

heated oxygen sensor.

4. Warm up the engine until engine coolant is 80

°C (176°F) or

higher.

5. Drive at 50 km/h (31 mph) or more for 10 minutes.
6. Connect a digital voltage meter between terminal No. 2

(black clip) and terminal No. 4 (white clip).

7. Measure the output voltage of the heated oxygen sensor

under the following driving.

• Transaxle: 2 nd

• Drive with wide open throttle

• Engine: 3,500 r/min or more

Standard value:

NOTE: If the temperature of sensing area does not reach
the high temperature [of approximately 400

°

C (752

°

F) or

more] even though the oxygen sensor is normal, the output
voltage would be possibly low in spite of the rich air-fuel
ratio.
NOTE: When the vehicle is driven with high loads, the tem-
perature of the sensing area of the heated oxygen sensor is
sufficiently high. Thus, it is not necessary to apply the volt-
age to the heater.

8. If the output voltage is not within the standard value, replace

the heated oxygen sensor.
NOTE: If the temperature of sensing area does not reach
the high temperature [of approximately 400

°

C (752

°

F) or

more] even though the oxygen sensor is normal, the output
voltage would be possibly low in spite of the rich air-fuel
ratio.

HEATED OXYGEN
SENSOR OUTPUT
VOLTAGE

REMARKS

0.6

− 1.0 V

High load operation makes
air/fuel ratio richer and
normal heated oxygen
sensor also can output
voltage of 0.6

− 1.0 V.

AK700103AB

MD998464

Blue

Red

Heated oxygen
sensor component
side connector

AK700104

MD998464

White

Black

AB

Heated oxygen
sensor component
side connector