Lexus ES300 (2002 year). Manual — part 396
-
DIAGNOSTICS
SFI SYSTEM (1MZ-FE)
05-181
334
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
7
CHECK FUSE(E.F.I.)
NG
CHECK FOR SHORT IN ALL HARNESS AND
COMPONENTS CONNECTED EFI FUSE
OK
8
CHECK E.F.I ECU RELAY (See page
NG
REPLACE E.F.I ECU RELAY
OK
9
CHECK HARNESS AND CONNECTOR(MREL - E2)
NG
REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPAIR OR REPLACE HARNESS AND CONNECTOR
A57026
Vacuum Tank
E.F.I. ECU Relay
IG2 (30A)
AM2 (30A) E.F.I. (20A)
Engine Mounting Insulator FR
Vacuum Switching Valve
Air Cleaner Cap
A
C
B
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DIAGNOSTICS
SFI SYSTEM (1MZ-FE)
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2002 LEXUS ES300 REPAIR MANUAL (RM911U)
ACTIVE CONTROL ENGINE MOUNT
LOCATION
056HD-01
A62465
MREL
8
VSV for ACM
E6
B-W
B-W
Battery
B-G
B-G
FL MAIN
Engine
Room R/B
W-B
2
1A
E.F.I.
1
1
5
3
E.F.I. ECU Relay
3
1C
2
1
ED
1K
1B
Engine Room J/B
5
6
ACM1
24
E10
ECM
1
2
B-L
A61613
A
C
Engine
B
Intake Air Control Valve
Actuator
Vacuum Tank
Air Cleaner
Front Engine Mount Insulator
VSV
Cap
ECM
-
DIAGNOSTICS
SFI SYSTEM (1MZ-FE)
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2002 LEXUS ES300 REPAIR MANUAL (RM911U)
CIRCUIT DESCRIPTION
Active control engine mount (ACM) system dampens engine vibration at low engine speed using ACM VSV.
The VSV is controlled by a pulse signal transmitted to the VSV from the engine control module (ECM). In
normal operation, the frequency of this pulse signal is correctly matched to engine speed to effectively damp-
en engine vibration.
WIRING DIAGRAM
INSPECTION PROCEDURE
1
CHECK VACUUM HOSE
(a)
Check whether the cap of vacuum hose is missing or not.
(b)
Do not repair the hose with a cap by cutting it. If the hose
is damaged, be sure to replace whole vacuum hose as-
sembly.
(c)
Check the air/vacuum hose for looseness, disconnection
and blockage.
NG
REPAIR OR REPLACE VACUUM HOSE
OK
A61611
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DIAGNOSTICS
SFI SYSTEM (1MZ-FE)
337
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
2
PERFORM ACTIVE TEST BY OBD II SCAN TOOL OR HAND-HELD
TESTER(ACTIVE CONTOROL ENGINE MOUNT)
(a)
Warm up engine to normal operating temperature.
(b)
Connect the hand-held tester to the DLC3.
(c)
Select the ACM inhibit active test on the hand-held tester.
(d)
Shift transmission into ”N” or ”P” range.
(e)
Check whether or not engine vibration is increased while the ACM inhibit active test is in the ”ON” state.
Result: Engine vibration is increased.
NG
OK
3
CHECK INTAKE MANIFOULD VACUUM PRESSURE
(a)
Warm up engine to normal operating temperature.
(b)
Chock the 4 wheels.
(c)
Fully apply the parking brake.
(d)
Keep your foot pressing firmly on the brake pedal.
(e)
Shift transmission into ”D” position.
(f)
Disconnect the vacuum hose.
(g)
Check that disconnected hose applies suction to your fin-
ger intermittently.
OK
SYSTEM OK
NG
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