Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 338

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-551

THROTTLE BODY (THROTTLE VALVE AREA)
CLEANING

M1131001000064

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 MB991502 to erase any diagnostic trouble

code.

10.Adjust the basic idle speed. (Refer to

P.13B-552

.)

ACX02509 AE

U

ECM OR PCM

ACX02494 AD

V

FUEL TANK
DIFFERENTIAL
PRESSURE
SENSOR

ACX02516 AE

W

EVAPORATIVE EMISSION
VENTILATION SOLENOID VALVE

FUEL TANK

AK000112AB

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-552

WARNING

Battery posts, terminals and related accessories
contain 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

M1131001100049

Required Special Tools:
MB991502: Scan Tool (MUT-II)
MB991348: Test Harness Set

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
1. Connect scan tool MB991502 to the data link connector.

When not using the scan tool, proceed as follows.

(1) Disconnect the throttle position sensor connector, and

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

(2) Connect a digital voltmeter between throttle position

sensor terminal 3 (sensor output) and terminal 1 (sensor
ground).

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

the engine).

3. Check the throttle position sensor output voltage.

Standard value: 535

−

735 mV

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 MB991502, and connect the throttle

position sensor connector. When the scan tool is not used,
remove special tool MB991348, and connect the throttle
position sensor connector.

BASIC IDLE SPEED ADJUSTMENT

M1131001800060

Required Special Tool:
MB991502: Scan Tool (MUT-II)

NOTE: The standard idling speed has been adjusted with the
speed adjusting screw (SAS), by the manufacturer. There
should be no need for readjustment.

AKX01177

16 PIN

MB991502

AB

ACX02484

THROTTLE POSITION
SENSOR

AE

AKX01636AB

TERMINAL 3
(SENSOR OUTPUT)

TERMINAL 1
(SENSOR
GROUND)

MB991348

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-553

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
confirming 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, electric cooling fan and accessories: OFF

•

Transaxle: Neutral ("P" range on vehicle with A/T)

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
2. Connect scan tool MB991502 to the data link connector (16-

pin).

NOTE: When scan tool MB991502 is connected, the
diagnostic 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.

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 deposits are adhered
to the throttle valve, so clean it. (Refer to

P.13B-551

)

Standard value: 700 + 50 r/min

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.

8. Turn the ignition switch to the "LOCK" (OFF) position.

NOTE: Unless the IAC motor is released, the Actuator test
mode will continue for 27 minutes.

9. Disconnect scan tool MB991502.

10.Start the engine again and let it idle for about 10 minutes.

Check that the idling condition is normal.

AKX01177

16 PIN

MB991502

AB

AK000115AB

SPEED ADJUSTING SCREW

ON-VEHICLE SERVICE

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-554

FUEL PRESSURE TEST

M1131001900056

Required Special Tools:
MB991502: Scan Tool (MUT-II)
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.13B-556

.)

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 high-pressure fuel 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 (adaptor hose) and instead attach special tool
MD998742 (hose adaptor) to the adaptor hose.

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

tools MD998709 and MD998742 and install the fuel
pressure gauge.

3. Install the assembled fuel pressure measurement tools

between the fuel rail and high-pressure fuel hose.

<When using the special tool MB991637 (fuel pressure

gauge set)>

1. Remove the union joint and bolt from special tool

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

2. Install special tool MB991637 (fuel pressure gauge set) into

assembled special tools MD998709 and MD998742 via a
gasket.

3. Install the assembled fuel pressure measurement tools

between the fuel rail and the high-pressure fuel hose.

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
4. Connect scan tool MB991502 to the data link connector.

5. Use Actuator test 07 to drive the fuel pump. Check that there

is no fuel leaking from any section when the fuel pump is
operating.

6. Stop the fuel pump.

7. Start the engine and run at idle.

8. Measure fuel pressure while the engine is running at idle.

Standard value: Approximately 270 kPa (38 psi) at
curb idle

AK000117AB

HIGH-PRESSURE
FUEL HOSE

AKX01457AB

FUEL PRESSURE
GAUGE

O-RING OR GASKET

MD998709

MD998742

HIGH-PRESSURE
FUEL HOSE

FUEL
RAIL

AKX01458

MB991637

O-RING OR GASKET

MD998709

MD998742

HIGH-
PRESSURE
FUEL HOSE

FUEL
RAIL

AB

AKX01177

16 PIN

MB991502

AB