Mitsubishi Montero (2004+). Manual — part 380

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-1007

Standard value:

CAUTION

• Be very careful when connecting the jumper wire;

incorrect connection can damage the heated oxygen
sensor.

• Be careful the heater is broken when voltage of beyond

8 volts is applied to the heated oxygen sensor heater.

NOTE: If the sufficiently high temperature [of approximate
400

°

C (752

°

F) or more] is not reached although the heated

oxygen sensor is normal, the output voltage would be possibly
low although the rich air/fuel ratio. Therefore, if the output volt-
age is low, use a jumper wire to connect the terminal No. 1 (red
clip of special tool) and the terminal No. 3 (blue clip of special
tool) of the heated oxygen sensor with the positive terminal and
the negative terminal of 8 volts power supply respectively, then
check again.
3. If the sensor is defective, replace the heated oxygen sensor.
NOTE: For removal and installation of the heated oxygen sen-
sor, refer to GROUP 15, Exhaust Pipe and Main Muffler

P.15-13

.

INJECTOR CHECK

M1131005200510

Measurement of Resistance between Terminals

1. Disconnect the injector intermediate connector.

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.

AK201314AB

INJECTOR INTERMEDIATE
HARNESS CONECTOR

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-1008

2. Measure the resistor between the injector intermediate male

side connector terminals.

Standard value:

3. Connect the injector intermediate connector.

THROTTLE ACTUATOR CONTROL MOTOR
CHECK

M1131051000069

.

<Operation Inspection>
1. Disconnect the air intake hose from the throttle body.
2. Set the ignition switch to the ON position.
3. Operate the accelerator pedal and confirm that the throttle

valve is opening and closing accordingly.

.

<Checking the Terminal Resistance>
1. Disconnect the throttle position sensor connector.
2. Measure the resistance between terminal No. 5 and No. 6.

Standard value 0.3

− 100 ohms [at 20°C (68°F)]

3. If resistance is outside the standard value, replace the

throttle body assembly.

EVAPORATIVE EMISSION PURGE SOLENOID
CHECK

M1131005600239

Refer to GROUP 17, Emission Control System

− Evaporative

Emission System

− Evaporative Emission Purge Solenoid

Check

P.17-67

.

INJECTOR NO.

MEASUREMENT
TERMINAL

RESISTANCE

NO. 1

8

− 3

13

− 16 kΩ

[20

°C (68°F)]

NO. 2

8

− 2

NO. 3

8

− 1

NO. 4

8

− 7

NO. 5

8

− 6

NO. 6

8

− 5

AKX01494

INJECTOR INTERMEDIATE
MALE SIDE CONNECTOR

1 2 3 4

5 6 7 8

AB

AK201173AC

THROTTLE
ACTUATOR
CONTROL
MOTOR

6

1 2 3 4 5

AK201513AB

THROTTLE ACTUATOR
CONTROL MOTOR
SIDE CONNECTOR

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-1009

EGR VALVE CHECK

M1131051500020

Refer to GROUP 17, Emission Control System

− Exhaust Gas

Recirculation (EGR) System

− EGR Valve Check.

P.17-69

INTAKE MANIFOLD TUNING SOLENOID CHECK

M1131006500042

Refer to GROUP 15, Intake and Exhaust System

− On-vehicle

Service

− Intake Manifold Tuning Solenoid Check

P.15-4

.

INJECTOR

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-1010

INJECTOR

REMOVAL AND INSTALLATION

M1131007100791

Pre-removal Operation
• Fuel Line Pressure Reduction (Refer to

P.13A-998

).

• Intake Manifold Plenum Removal (Refer to GROUP15

P.15-7

).

Post-installation Operation
• Intake Manifold Plenum Installation (Refer to GROUP 15

P.15-7

).

• Fuel Leakage Inspection

AC203985AB

9.0 ± 1.0 N

·

m

80 ± 9 in-lb

12 ± 1 N·m
102 ± 13 in-lb

8

4, 6, 15

3, 5, 14

11

9

16

ENGINE OIL

7

1

3

2

4

10

5

12

14

16

13

12

7

15

8

11

11

16

N

N

N

9.0 ± 1.0 N

·

m

80 ± 9 in-lb

N

6

N

5.0 ± 1.0 N·m
44 ± 9 in-lb

15

N

9

13

N

10

N

12 ± 1 N·m
102 ± 13 in-lb

12 ± 1 N·m
102 ± 13 in-lb

9

9

12

N

13

N

REMOVAL STEPS

1.

VACUUM HOSE

2.

FUEL RETURN HOSE
CONNECTION

>>A<<

3.

FUEL PRESSURE REGULATOR

4.

O-RING

>>A<<

5.

FUEL HIGH-PRESSURE HOSE
CONNECTION

6.

O-RING

7.

INJECTOR CONNECTORS

<<A>>

8.

FUEL INJECTORS, FUEL PIPE
AND FUEL RAILS ASSEMBLY

9.

INSULATORS

10. INSULATORS

>>A<<

11. INJECTORS

REMOVAL STEPS (Continued)