Mitsubishi Montero Sport (2004+). Manual — part 367

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-881

THROTTLE BODY CLEANING

M1131001000473

1. Start the engine and warm it up until the coolant is heated to

80

°C (176°F) or higher. Stop the engine.

2. Remove the air intake hose from the throttle body.

CAUTION

Do not allow cleaning solvent to enter the bypass passage.
3. Plug the bypass passage inlet (arrow) of the throttle body.
4. Spray cleaning solvent into the valve through the throttle

body intake port and leave it for approximately five minutes.

5. Start the engine, rev it several times and then idle it for about

one minute. If the idling speed becomes unstable (or if the
engine stalls) due to the bypass passage being plugged,
slightly open the throttle valve to keep the engine running.

6. If the throttle valve deposits are not removed, repeat steps 4

and 5.

7. Unplug the bypass passage inlet.
8. Attach the air intake hose.
9. Use scan tool MB991958 to erase any diagnostic trouble

code.

10.Adjust the basic idle speed. (Refer to

P.13A-883

.)

WARNING

Battery posts, terminals and related accessories con-
tain lead and lead compounds. WASH HANDS AFTER
HANDLING.

NOTE: If the engine hunts while idling after adjustment of
the basic idle speed, disconnect the negative cable from the
battery for 10 seconds or more, and then reconnect it and
run the engine at idle for about 10 minutes after the engine
is warmed up.

THROTTLE POSITION SENSOR ADJUSTMENT

M1131001100555

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: V.C.I

• MB991827: USB Cable

• MB991911: Main Harness B

• MB991348: Test Harness Set

AK303656AB

AK000332AC

THROTTLE POSITION SENSOR

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-882

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.

When not using the scan tool MB991958, proceed as
follows.

(1) )Disconnect the throttle position sensor connector, and

connect the special tool MB991348 in between. (All
terminals should be connected.)

(2) Connect a digital voltmeter between throttle position

sensor terminals No. 3 (sensor output) and No. 1 (sensor
ground).

2. Turn the ignition switch to the "ON" position. (Do not start

the engine.)

3. Check the throttle position sensor output voltage.

Standard value: 535

− 735 mililvolts

4. If not within the standard value range, adjust by loosening

throttle position sensor mounting bolts and turning the
throttle position sensor body. After adjusting, tighten the
bolts securely.

5. Turn the ignition switch to the "LOCK" (OFF) position.
6. Disconnect scan tool MB991958.

When the scan tool MB991958 is not used, remove special
tool MB991348, and connect the throttle position sensor
connector.
NOTE: If a diagnostic trouble code is sent while adjusting
the throttle position sensor, use scan tool MB991958 to
erase the diagnostic trouble code.

AK303629AB

MB991911

MB991827

MB991824

16-PIN

AKX01636AB

TERMINAL 3
(SENSOR OUTPUT)

TERMINAL 1
(SENSOR
GROUND)

MB991348

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-883

BASIC IDLE SPEED ADJUSTMENT

M1131001800617

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: V.C.I

• MB991827: USB Cable

• MB991911: Main Harness B

NOTE: The standard idling speed has been adjusted with the
speed adjusting screw (SAS), by the manufacturer. There
should be no need for readjustment.
NOTE: If the adjustment has been changed by mistake, the idle
speed may become too high or the idle speed may drop too low
when loads A/C, defogger, etc. are placed on the engine. If this
occurs, adjust by the following procedure.
NOTE: The adjustment, if made, should be made after first con-
firming that the spark plugs, the injectors, the idle air control
motor, compression, etc., are all normal.
1. The vehicle should be prepared as follows before the

inspection and adjustment.

• Engine coolant temperature: 80 − 95° C (176 − 203°F)

• Lights and all accessories: OFF

• Transmission: P range

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.
2. Connect scan tool MB991958 to the data link connector

(16-pin).
NOTE: When scan tool MB991958 is connected, the diag-
nostic test mode control terminal should be grounded.

3. Start the engine and run at idle.
4. Select the item number 30 of the scan tool Actuator test.

NOTE: Use the scan tool to hold the IAC motor at the basic
step to adjust the basic idle speed.

5. Check the idle speed.

Standard value: 700

± 50 r/min

NOTE: The engine speed may be 20 to 100 r/min lower than
indicated above for a new vehicle [driven approximately 500
km (300 mile) or less], but no adjustment is necessary.
NOTE: If the engine stalls or the engine speed is low even
though the vehicle has been driven approximately 500 km
(300 mile) or more, it is probable that the throttle valve is
dirty, so clean it. (Refer to

P.13A-881

.)

AK303629AB

MB991911

MB991827

MB991824

16-PIN

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI)

13A-884

6. If not within the standard value range, turn the speed

adjusting screw (SAS) to make the necessary adjustment.

7. Press the scan tool clear key, and release the IAC motor

Actuator test mode.
NOTE: Unless the A/C motor is released, the Actuator test
mode will continue 27 minutes.

8. Turn the ignition switch to the "LOCK" (OFF) position.
9. Disconnect scan tool MB991958.
10.Start the engine again and let it idle for about 10 minutes.

Check that the idling condition is normal.

FUEL PRESSURE TEST

M1131001900551

Required Special Tools:

• MB991958: Scan Tool (MUT-III Sub Assembly)

• MB991824: V.C.I

• MB991827: USB Cable

• MB991911: Main Harness B

• MB991637: Fuel Pressure Gauge Set

• MD998709: Adaptor Hose

• MD998742: Hose Adaptor

1. Release residual pressure from the fuel line to prevent fuel

spray. (Refer to

P.13A-887

.)

WARNING

To prevent a fire, cover the hose connection with
shop towels to prevent splashing of fuel that could be
caused by some residual pressure in the fuel pipe
line.

2. Disconnect the fuel high-pressure hose at the fuel rail side.
3. Assemble the fuel pressure measurement tools as follows.

<When using the fuel pressure gauge>

1. Remove the union joint and bolt from special tool

MD998709 (adapter hose) and instead attach special tool
MD998742 (hose adapter) to the adapter hose.

2. Place a suitable O-ring or gasket on the assembled special

tools MD998709 and MD998742 and install the fuel pres-
sure gauge.

3. Install the assembled fuel pressure measurement tools

between the fuel rail and fuel high-pressure hose.

AKX01455

AKX01456

FUEL-
RAIL

AC

FUEL
HIGH-PRESSURE
HOSE

AKX01457AH

FUEL PRESSURE
GAUGE

O-RING OR GASKET

MD998709

MD998742

FUEL
RAIL

FUEL
HIGH-PRESSURE
HOSE