Lexus ES300 (2002 year). Manual — part 312
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DIAGNOSTICS
ABS WITH EBD & BA & TRAC & VSC SYSTEM
05-367
520
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
3
INSPECT BATTERY(TERMINAL VOLTAGE)
(a)
Check the battery positive voltage.
OK: 10 - 14 V
NG
CHECK AND REPLACE CHARGING SYSTEM
OK
4
CHECK VSC WARNING LIGHT
IN CASE OF USING THE HAND-HELD TESTER:
(a)
Select the item ”VSC WARN LIGHT” in the ACTIVE TEST and operate the VSC warning light on the
hand-held tester.
(b)
Check that ”ON” and ”OFF” of the VSC warning light can be shown on the combination meter on the
hand-held tester.
IN CASE OF NOT USING THE HAND-HELD TESTER:
(a)
Turn the ignition switch OFF.
(b)
Disconnect the connector from the skid control ECU.
(c)
Turn the ignition switch ON.
(d)
Check the VSC warning light goes off.
OK
CHECK AND REPLACE SKID CONTROL ECU
ASSY
NG
CHECK AND REPAIR HARNESS OR CONNECTOR
055XJ-02
F41246
Combination Meter
ABS Warning Light
Brake Warning Light
Skid Control Sensor
Brake Actuator
with Skid Control ECU
Stop Lamp Switch
Front Speed Sensor
05-248
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DIAGNOSTICS
ABS WITH EBD SYSTEM
401
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
LOCATION
B-G
F41991
Skid Control ECU
Combination Meter
1
WA
S7
Passenger Side J/B
ABS
R-B
86
57
96
40
C7
6
3A
C7
3A
3B
3B
87
W
Driver Side J/B
From
Ignition SW
B-Y
IG1 Relay
2
8
2E
2A
IA
5
1
1
8
From Battery
2
GAUGE1
2M
2R
W-B
W
W
W
3
05-368
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DIAGNOSTICS
ABS WITH EBD & BA & TRAC & VSC SYSTEM
521
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
ABS WARNING LIGHT CIRCUIT (REMAINS ON)
CIRCUIT DESCRIPTION
If the ECU detects trouble, it lights the ABS warning light while prohibiting ABS control. At this time, the ECU
records a DTC in memory.
Connect terminals Tc and CG of the DLC3 to make the ABS warning light blink and output the DTC.
WIRING DIAGRAM
INSPECTION PROCEDURE
1
RECONFIRM DTC(See page
)
A
Normal Code
B
Malfunction Code
B
REPAIR CIRCUIT INDICATED BY OUTPUT
CODE
A
2
CHECK HARNESS AND CONNECTOR(DLC3 - SKID CONTROL ECU ASSY)
(See page
NG
REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK
CHECK AND REPLACE SKID CONTROL ECU ASSY
055W4-02
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DIAGNOSTICS
ABS WITH EBD & BA & TRAC & VSC SYSTEM
05-369
522
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
ABS WARNING LIGHT CIRCUIT (DOES NOT LIGHT UP)
CIRCUIT DESCRIPTION
Refer to ABS Warning Light Circuit (Remains ON) on page
.
WIRING DIAGRAM
Refer to ABS Warning Light Circuit (Remains ON) on page
.
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using the hand-held tester and start from step 2 in case of not
using the hand-held tester.
1
PERFORM ACTIVE TEST BY HAND-HELD TESTER(ABS WARNING LIGHT
OPERATION)
(a)
Select the item ”ABS WARN LIGHT” in the ACTIVE TEST and operate the ABS warning light on the
hand-held tester.
(b)
Check that ”ON” of the ABS warning light can be shown on the combination meter using the hand-held
tester.
OK
CHECK AND REPLACE SKID CONTROL ECU
ASSY
NG
2
INSPECT COMBINATION METER ASSY(ABS WARNING LIGHT CIRCUIT)
NG
REPAIR COMBINATION METER ASSY
OK
CHECK AND REPAIR HARNESS AND CONNECTOR
055W5-02
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