Lexus RX300 (MCU15). Manual — part 427
EC0I3–01
B01082
Gasket
B12170
Cap
B12171
Air
Port A
Port B
Port C
Compressed
Air
B12172
Compressed Air
Air
Air
–
EMISSION CONTROL
EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
EC–5
LEXUS RX300 (RM785E)
EVAPORATIVE EMISSION (EVAP)
CONTROL SYSTEM
INSPECTION
1.
VISUALLY INSPECT LINES AND CONNECTORS
Look for loose connections, sharp bends or damage.
2.
VISUALLY INSPECT FUEL TANK FILLER PIPE
Look for deformation, cracks or fuel leakage.
3.
VISUALLY INSPECT FUEL TANK CAP
Check if the cap and/or gasket are deformed or damaged.
If necessary, repair or replace the cap.
4.
REMOVE CHARCOAL CANISTER ASSEMBLY
Disconnect the 2 hoses and pull up the canister.
5.
INSPECT CHARCOAL CANISTER
(a)
Remove the charcoal canister cap.
(b)
Visually check the charcoal canister for cracks or dam-
age.
(c)
While holding port C closed, using low pressure com-
pressed air (4.9 kPa (50 gf/cm
2
, 0.71 psi)), blow into port
A and check that air flows without resistance from the port
B.
(d)
Using low pressure compressed air (4.9 kPa (50 gf/cm
2
,
0.71 psi)), blow into port A and check that air flows without
resistance from the other ports.
B12173
Vacuum
Port A
Port C
Port B
Cap
B12174
Port A
Port B
Compressed
Air
Port C
EC–6
–
EMISSION CONTROL
EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
LEXUS RX300 (RM785E)
(e)
Apply vacuum (1.96 kPa (20 gf/cm
2
, 0.28 psi)) to port A,
check that the vacuum does not decrease when port B
and C are closed, and check that the vacuum decreases
when port B is opened.
If a problem is found, replace the charcoal canister.
6.
CLEAN FILTER IN CANISTER
Clean the filter by blowing 19.6 kPa (0.2 kgf/cm
2
, 2.8 psi) of
compressed air into port B while holding port A closed.
NOTICE:
S
Do not attempt to wash the canister.
S
No activated carbon should come out.
7.
REINSTALL CHARCOAL CANISTER
EC020–05
–
EMISSION CONTROL
WARM UP THREE–WAY CATALYTIC CONVERTER
(WU–TWC) SYSTEM
EC–7
LEXUS RX300 (RM785E)
WARM UP THREE–WAY CATALYTIC CONVERTER
(WU–TWC) SYSTEM
ON–VEHICLE INSPECTION
1.
INSPECT EXHAUST PIPE ASSEMBLY
(a)
Check the connections for looseness or damage.
(b)
Check the clamps for weakness, cracks or damage.
2.
INSPECT WU–TWC
Check for dents or damage.
If any part of the protector is damaged or dented to the extent that it contacts the WU–TWC, repair or replace
it.
3.
INSPECT WU–TWC HEAT INSULATOR
(a)
Check the heat insulator for damage.
(b)
Check for adequate clearance between the catalytic converter and heat insulator.
EC021–07
B12567
N·m (kgf·cm, ft·lbf) : Specified torque
z
Non–reusable part
WU–TWC for Bank 1
z
Gasket
56 (570, 41)
z
Gasket
48 (490, 36)
z
z
Compression Spring
62 (630, 46)
Front Exhaust Pipe
WU–TWC (for Bank 1)
z
Gasket
48 (490, 36)
Compression
Spring
EC–8
–
EMISSION CONTROL
WARM UP THREE–WAY CATALYTIC CONVERTER
(WU–TWC) SYSTEM
LEXUS RX300 (RM785E)
COMPONENTS
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