Mitsubishi Lancer Evolution 7. Manual — part 220
INTAKE AND EXHAUST -
On-vehicle Service
15-5
3. If there is a significant deviation from the standard value,
check the actuator or the waste gate valve: replace
actuator or turbocharger assembly if necessary.
WASTE GATE SOLENOID VALVE CHECK
OPERATION CHECK
1. Connect a hand vacuum pump to the solenoid valve nipple
A.
2. Using a jumper wire, connect between the solenoid valve
terminal and battery terminal.
3. Connecting and disconnecting the jumper wire at the
battery negative terminal to apply a negative pressure,
check tightness.
Jumper wire
B nipple
condition
Normal condition
Connected
Opened
Negative pressure leaks.
Closed
Negative pressure is held.
Disconnected
Opened
Negative pressure is held.
COIL RESISTANCE CHECK
Measure the resistance between solenoid valve terminals.
Standard value: 29 – 35 Ω (at 20_C)
AIR BYPASS VALVE CHECK
1. Remove the air bypass valve.
2. Connect the hand vacuum pump to the nipple of the
air bypass valve.
3. Apply a negative pressure of approximately 49 kPa, and
check that air tightness is maintained.
4. Also check operation of the valve.
Standard value:
Negative pressure
Valve operation
Approximately 53 kPa
It starts opening
Battery
B
A
INTAKE AND EXHAUST -
On-vehicle Service
15-6
INTAKE MANIFOLD PRESSURE CHECK
Refer to GROUP 11A – On-vehicle Service.
SECONDARY AIR CONTROL SYSTEM CHECK
1. Start the engine and carry out idling.
2. Confirm that the secondary air valve lifts up when the
engine-ECU connector No. 53 terminal is short-circuited
with the earth using a jumper wire.
The engine-ECU connector must be connected at this
time.
SECONDARY AIR CONTROL SOLENOID
VALVE CHECK
OPERATION CHECK
1. Disconnect the vacuum hose (white-striped, yellow-
striped) from the solenoid valve.
2. Separate the harness connector.
3. Connect the hand vacuum pump to the solenoid valve’s
A nipple.
4. Connect the solenoid valve terminal and battery terminal
with a jumper wire.
5. Disconnect the jumper wire between the battery’s (-)
terminals, apply a negative pressure, and inspect the
tightness.
Jumper wire
State of B
nipple
Normal state
Connected
Opened
Negative pressure leaks.
Closed
Negative pressure is
maintained.
Disconnected
Closed
Negative pressure leaks.
Vacuum tank
Secondary
air control
solenoid
valve
Battery
A
B
INTAKE AND EXHAUST -
On-vehicle Service
15-7
COIL RESISTANCE CHECK
Measure the resistance between the solenoid valve terminals.
Standard value: 29 – 35 Ω (at 20_C)
SECONDARY AIR VALVE CHECK
1. Disconnect the secondary air valve.
2. Connect the hand vacuum pump to the secondary air
valve’s nipple.
3. Apply a negative pressure of 67 kPa, and confirm that
the negative pressure is maintained.
4. Blow in air from the (A) side and (B) side of the secondary
air valve, and inspect the ventilation.
Negative pressure
Air blow-in
direction
Air ventilation
0 kPa
(State without
negative pressure)
(A) → (B)
Not ventilated
40 kPa or more
(A) → (B)
Ventilated
(B) → (A)
Not ventilated
VACUUM TANK CHECK
1. Connect the hand vacuum pump to the vacuum tank’s
A nipple. Apply a negative pressure of 67 kPa, and confirm
that the negative pressure is maintained.
2. Connect the hand vacuum pump to the vacuum tank’s
B nipple.
3. Plug the A nipple with a finger, and apply a negative
pressure of 67 kPa. Confirm that the negative pressure
leaks immediately when the finger is released.
B
A
A
B
INTAKE AND EXHAUST -
Air Cleaner
15-8
AIR CLEANER
REMOVAL AND INSTALLATION
Caution
Parts marked by * are made of recycled-paper mixed plastic material, so observe the following
precautions.
1. Avoid any shock or load to these parts when removing and installing them.
2. Engage the case hinges securely when assembling these parts.
NOTE
Parts marked by * are made of recycled-paper mixed plastic material, so can be disposed of by incineration.
1
6
*
3
7
2
8
5
4
9.0 ± 1.0 N·m
6.0 ± 1.0 N·m
9.0 ± 1.0 N·m
9.0 ± 1.0 N·m
4.0 ± 1.0 N·m
4.0 ± 1.0 N·m
9.0 ± 1.0 N·m
2
9
10
11
9.0 ± 1.0 N·m
Removal steps
D
Battery
1. Air duct
2. Vacuum hose
D
Air pipe E, Air by-pass valve assembly,
Air by-pass hose (Refer to P.15-9.)
3. Air intake hose
4. Air flow sensor assembly
5. Gasket
6. Air cleaner assembly
7. Air cleaner cover
8. Air cleaner element
9. Air cleaner body
10. Waste gate solenoid valve
11. Air cleaner bracket
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