Lexus ES300 (1997 year). Manual — part 525
SF064–02
S04582
S04595
Throttle
Stop Screw
Vacuum
No Clearance
Throttle Lever
S04594
VTA
E2
VC
Ohmmeter
Vacuum
SF–34
–
SFI
THROTTLE BODY
885
1997 LEXUS ES300 (RM511U)
INSPECTION
1.
CLEAN THROTTLE BODY
(a)
Using a soft brush and carburetor cleaner, clean the cast
parts.
(b)
Using compressed air, clean all the passages and aper-
tures.
NOTICE:
To prevent deterioration, do not clean the throttle position
sensor and IAC valve.
2.
INSPECT THROTTLE VALVE
(a)
Apply vacuum to the throttle opener.
(b)
Check that there is no clearance between the throttle stop
screw and throttle lever when the throttle valve is fully
closed.
3.
INSPECT THROTTLE POSITION SENSOR
(a)
Apply vacuum to the throttle opener.
(b)
Using an ohmmeter, measure the resistance between
each terminal.
Throttle valve
condition
Between
terminals
Resistance
Fully closed
VTA – E2
0.2 – 5.7 k
Ω
Fully open
VTA – E2
2.0 – 10.2 k
Ω
–
VC – E2
2.5 – 5.9 k
Ω
SF065–01
–
SFI
THROTTLE BODY
SF–35
886
1997 LEXUS ES300 (RM511U)
INSTALLATION
Installation is in the reverse order of removal (See page
S04529
DLC1
E1
TE1
DLC1
SST
S04533
RSC
+B
RSO
Ohmmeter
SF066–01
S04529
E1
DLC1
TE1
DLC1
SST
SF–36
–
SFI
IDLE AIR CONTROL (IAC) VALVE
887
1997 LEXUS ES300 (RM511U)
IDLE AIR CONTROL (IAC) VALVE
ON–VEHICLE INSPECTION
1.
INSPECT IAC VALVE OPERATION
(a)
Initial conditions:
Engine at normal operating temperature
Idle speed checked correctly
Transmission in neutral position
A/C switch OFF
(b)
Using SST, connect terminals TE1 and E1 of the DLC1.
SST
09843–18020
(c)
After engine speed is kept at approx. 1,000 rpm for 5 se-
conds, check that it returns to idle speed.
If the engine speed operation is not as specified, check the IAC
valve, wiring and ECM.
(d)
Remove the SST from the DLC1.
SST
09843–18020
2.
INSPECT IAC VALVE RESISTANCE
NOTICE:
”Cold” and ”Hot” in the following sentences express the
temperature of the coils themselves. ”Cold” is from –10
°
C
(14
°
F) to 50
°
C (122
°
F) and ”Hot” is from 50
°
C (122
°
F) to
100
°
C (212
°
F).
(a)
Disconnect the IAC valve connector.
(b)
Using an ohmmeter, measure the resistance between ter-
minal +B and other terminals (RSC, RSO).
Resistance:
Cold: 17.0 – 24.5
Ω
Hot: 21.5 – 28.5
Ω
If resistance is not as specified, replace the IAC valve.
(c)
Reconnect the IAC valve connector.
3.
INSPECT AIR ASSIST SYSTEM
(a)
Initial conditions:
Engine at normal operating temperature
Idle speed checked correctly
Transmission in neutral position
A/C switch OFF
(b)
Using SST, connect terminals TE1 and E1 of the DLC1.
SST
09843–18020
(c)
After engine speed is kept at 900 – 1,300 rpm for 10 se-
conds, check that it returns to idle speed.
S05510
Plug
Disconnect
Plug
–
SFI
IDLE AIR CONTROL (IAC) VALVE
SF–37
888
1997 LEXUS ES300 (RM511U)
(d)
Stop the engine.
(e)
Disconnect the air assist hose from the air pipe, and block
off the IAC valve exit and the entry to the pipe.
(f)
Start the engine and check that the idle speed reaches
500 rpm or below (the engine may stall).
If the idle does not reach 500 rpm or below, check for a
leak between the air assist hoses, pipe and injectors.
(g)
Remove the SST from the DLC1.
SST
09843–18020
(h)
Reconnect the air assist hose to the IAC valve.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст