Mitsubishi Evolution X. Manual — part 227
EMISSION CONTROL <MFI - T/C>
TSB Revision
ENGINE AND EMISSION CONTROL
17-77
2. Before inspection and adjustment, set the vehicle in the
following conditions:
• Engine coolant temperature: 80 − 95° C (176 − 203° F)
• Lights, electric cooling fan and accessories: OFF
• Transaxle: Neutral (P range on vehicles with TC-SST)
3. Run the engine at idle for more than four minutes.
4. Check the purge flow volume when engine is revved
suddenly several times.
Standard value: Momentarily 20 cm
3
/s (2.5 SCFH) or
more.
5. If the purge flow volume is less than the standard value,
check it again with the vacuum hose disconnected from the
EVAP canister. If the purge flow volume is less than the
standard value, check the vacuum port and the vacuum
hose for clogging. Also check the EVAP purge solenoid. If
the purge flow volume is at the standard value, with the
EVAP canister disconnected, replace the EVAP canister.
EVAPORATIVE EMISSION PURGE SOLENOID
CHECK
M1173001700773
1. Disconnect the vacuum hose (black, black with red paint
mark) from the evaporative emission (EVAP) purge
solenoid.
NOTE: When disconnecting the vacuum hose, always place
an identification mark so that it can be reconnected at its
original position.
2. Disconnect the harness connector.
AK200339AB
A
B
3. Connect a hand vacuum pump to nipple (A) of the EVAP
purge solenoid (refer to the illustration at left).
4. As described in the chart below, check airtightness by
applying a vacuum with voltage applied directly from the
battery to the EVAP purge solenoid valve and without
applying voltage.
Jumper wire
Nipple "B" state Normal state
Connected
Opened
Negative
pressure leaks
Closed
Negative
pressure
maintained
Disconnected
Opened
Negative
pressure
maintained
AK103872
EMISSION CONTROL <MFI - T/C>
TSB Revision
ENGINE AND EMISSION CONTROL
17-78
5. Measure the resistance between the terminals of the EVAP
purge solenoid.
Standard value: 22
− 26 Ω [at 20° C (68° F)]
6. Replace the solenoid if resistance is out of specification.
MASS AIRFLOW SENSOR CHECK
M1173050400213
To inspect the sensor, refer to GROUP 13A, Multiport Fuel
Injection (MFI)
− Multiport Fuel Injection (MFI) Diagnosis −
Diagnostic Trouble Code Chart
.
No. 1 INTAKE AIR TEMPERATURE SENSOR
CHECK
M1173008200412
To inspect the sensor, refer to GROUP 13A, Multiport Fuel
Injection (MFI)
− Multiport Fuel Injection (MFI) Diagnosis −
Diagnostic Trouble Code Chart
.
BAROMETRIC PRESSURE SENSOR CHECK
M1173008000388
To inspect the sensor, refer to GROUP 13A, Multiport Fuel
Injection (MFI)
− Multiport Fuel Injection (MFI) Diagnosis −
Diagnostic Trouble Code Chart
.
ENGINE COOLANT TEMPERATURE SENSOR
CHECK
M1173008100772
To inspect the sensor, refer to GROUP 13A, Multiport Fuel
Injection (MFI)
− Multiport Fuel Injection (MFI) Diagnosis −
Diagnostic Trouble Code Chart
.
THROTTLE POSITION SENSOR CHECK
M1173050500038
To inspect the sensor, refer to GROUP 13A, Multiport Fuel
Injection (MFI)
− Multiport Fuel Injection (MFI) Diagnosis −
Diagnostic Trouble Code Chart
.
CRANKSHAFT POSITION SENSOR CHECK
M1173008300419
To inspect the sensor, refer to GROUP 13A, Multiport Fuel
Injection (MFI)
− Multiport Fuel Injection (MFI) Diagnosis −
Diagnostic Trouble Code Chart
.
EMISSION CONTROL <MFI - T/C>
TSB Revision
ENGINE AND EMISSION CONTROL
17-79
EVAPORATIVE EMISSION CANISTER AND FUEL TANK PRESSURE RELIEF
VALVE
REMOVAL AND INSTALLATION
M1173004800520
Pre-removal and post-installation operation
• Rear Wheel Splash Shield Rear Removal and Installation
(Refer to GROUP 42A, Splash Shield
).
AC709346
4.5 ± 1.5 N·m
40 ± 13 in-lb
4.5 ± 1.5 N·m
40 ± 13 in-lb
5.5 ± 1.5 N·m
49 ± 13 in-lb
11 ± 2 N·m
93 ± 22 in-lb
11 ± 2 N·m
93 ± 22 in-lb
1
2
3
4
5
6
7
8
9
10
AB
Removal steps
1.
Evaporative emission ventilation
solenoid valve connector
connection
2.
Fuel vapor tube assembly
3.
Fuel purge pipe assembly
connection
4.
Vent hose A
5.
Air filter
6.
Vent hose B
7.
Fuel vapor canister and bracket
assembly
8.
Fuel vapor canister bracket
9.
Fuel vapor canister assembly
10. Vent pipe
Removal steps (Continued)
EMISSION CONTROL <MFI - T/C>
TSB Revision
ENGINE AND EMISSION CONTROL
17-80
INSPECTION
M1173004900271
EVAPORATIVE EMISSION VENTILATION
SOLENOID CHECK
AC611222
Evaporative emission canister and
evaporative emission vent solenoid assembly
Nipple A
Hand
vacuum
pump
Plug
Nipple B
AB
1. Connect a hand vacuum pump to nipple (A) of the
evaporative emission canister and evaporative emission
ventilation solenoid assembly.
2. Connect a plug to nipple (B) of the evaporative emission
canister and evaporative emission ventilation solenoid
assembly.
AC611223
Evaporative emission vent solenoid
AB
3. Check air tightness by applying a vacuum with voltage
applied directly from the battery to the evaporative emission
ventilation solenoid and without applying voltage.
Battery voltage
Normal condition
Applied
Vacuum maintained
Not applied
Vacuum leaks
AC611224
Evaporative emission vent solenoid
AB
4. Measure the resistance between the terminals of the
solenoid.
Standard value: 17
− 21 Ω [at 20° C (68° F)]
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