Mitsubishi Lancer Evolution X. Manual — part 87

ON-VEHICLE SERVICE

TSB Revision

INTAKE AND EXHAUST

15-7

TURBOCHARGER WASTEGATE ACTUATOR
CHECK

M1151001200491

1. Connect a hand vacuum pump (pressure-application type)

to nipple.

CAUTION

In order to abovid damage to the diaphragm, do not apply
a pressure of 117 kPa (17 psi) or higher.
2. While gradually applying pressure, check the pressure that

begins to activate (approximately 1 mm stroke) the
turbocharger wastegate actuator rod.

Standard value: 98 − 102 kPa (14.3 − 14.7 psi)

3. If there is a significant deviation from the standard value,

check the actuator or the turbocharger wastegate regulating
valve: replace if necessary.

INTAKE CHARGE PRESSURE CONTROL SYSTEM
CHECK

M1151001100405

1. Removing the black hose from the No. 1 turbocharger

wastegate solenoid or the brown connector, connect
three-way joint between the hose and the solenoid.

2. Connect the pressurized type hand vacuum pump with the

three-way joint.

3. Use the turbocharger wastegate actuator control boost

nipple of air outlet fitting to remove the boost hose. Plug this
nipple.

CAUTION

Do not apply the pressure of 117 kPa or more to prevent
the diaphragm damage.
4. Blocking or releasing the boost hose end, apply the

pressure. Check the pressurized state.

5. Put the ignition switch in "LOCK" (OFF) position.

AK800010 AB

Turbocharger wastegate actuator

Engine state

Boost hose end Normal state

Stopped: Ignition
switch in "ON"
position

Opened

Pressure leaks

Closed

Pressure
maintained

Rapid racing

Pressure leaks

AK703284

Three-way joint

AC

AK800011

AB

Turbocharger wastegate actuator

Boost hose

ON-VEHICLE SERVICE

TSB Revision

INTAKE AND EXHAUST

15-8

6. Disconnect the connector of No. 1 turbocharger wastegate

solenoid or the brown connector.

7. Blocking or releasing the boost hose end, apply the

pressure. Check the pressurized state. Plug the boost hose
end while driving.

NOTE: Unless the pressurized state is normal, the turbo-
charger wastegate actuator, turbocharger wastegate solenoid
or the hose might have a malfunction.

TURBOCHARGER WASTE GATE SOLENOID
CHECK

M1151001300272

No.1 turbocharger wastegate solenoid or brown
connector

.

A Operation check

1. Install the hand vacuum pump to the nipple "A" of solenoid.
2. Use the jumper wire to connect the solenoid terminal with

the battery terminal.

3. Disconnecting the jumper wire at the negative (-) battery

side, apply the vacuum pressure. Check the airtightness.

.

Engine state

Boost hose end Normal state

Stopped: Ignition
switch in "ON"
position

Opened

Pressure leaks

Closed

Pressure
maintained

4,000 r/min after
warming up
engine

Pressure leaks

AK703285AC

No. 1 turbochager
wastegate solenoid valve

Jumper wire

Nipple "B" state Normal state

Connected

Opened

Negative
pressure leaks

Closed

Negative
pressure
maintained

Disconnected

Opened

Negative
pressure
maintained

AK703285AC

No. 1 turbochager
wastegate solenoid valve

AK200441

BATTERY

A

B

AD

ON-VEHICLE SERVICE

TSB Revision

INTAKE AND EXHAUST

15-9

B Check of coil resistance

1. Measure the resistance between the solenoid terminals.

Standard value: 29 − 35 Ω at 20° C (68° F)

NO.2 turbocharger wastegate solenoid or black
connector

.

A Operation check

1. Install the hand vacuum pump to the nipple "A" of solenoid.
2. Use the jumper wire to connect the solenoid terminal with

the battery terminal.

3. Disconnecting the jumper wire at the negative (-) battery

side, apply the vacuum pressure. Check the airtightness.

.

B Check of coil resistance

1. Measure the resistance between the solenoid terminals.

Standard value: 29 − 35 Ω at 20° C (68° F)

AK200442

Jumper wire

Nipple "B" state Normal state

Connected

Opened

Negative
pressure leaks

Closed

Negative
pressure
maintained

Disconnected

Opened

Negative
pressure
maintained

AK703283 AC

No. 2 turbochager
wastegate solenoid

AK200441

BATTERY

A

B

AD

AK200442

ON-VEHICLE SERVICE

TSB Revision

INTAKE AND EXHAUST

15-10

TURBOCHARGER BYPASS VALVE CHECK

M1151001600303

1. Remove the turbocharger bypass valve.
2. Connect the hand vacuum pump to the nipple of the

turbocharger bypass valve.

3. Apply a negative pressure of approximately 50 kPa (14.8

in.Hg) and check that air tightness is maintained.

4. Also check operation of the valve.

Negative pressure

Valve operation

60.1 − 76.1 kPa (17.8 − 22.4

in.Hg)

Starts opening

AK703106AD