Lexus ES300 (2002 year). Manual — part 301
F41242
ABS No. 2
-
DIAGNOSTICS
ABS WITH EBD & BA & TRAC & VSC SYSTEM
05-325
478
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
5
INSPECT FUSE(ABS NO.2 OF ENGINE ROOM J/B)
(a)
Remove ABS No. 2 fuse from the engine room J/B.
(b)
Check continuity of fuse.
OK: Continuity
OK
REPAIR OR REPLACE HARNESS AND
CONNECTOR
NG
REPLACE FUSE
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DIAGNOSTICS
ABS WITH EBD & BA & TRAC & VSC SYSTEM
479
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
DTC
C0278/11 OPEN CIRCUIT IN ABS SOLENOID RELAY
CIRCUIT
DTC
C0279/12 SHORT CIRCUIT IN ABS SOLENOID RELAY
CIRCUIT
CIRCUIT DESCRIPTION
This relay supplies power to each ABS solenoid. After the ignition switch is turned ON, if the initial check is
OK, the relay goes on.
DTC No.
DTC Detecting Condition
Trouble Area
C0278/11
Conditions 1. and 2. continue for 0.2 sec. or more:
1. ECU terminal IG1 voltage is 9.5 V to 17.0 V and the
solenoid relay is ON, however, the contact point of the
solenoid relay is OFF.
2. With solenoid relay ON, ECU terminal IG1voltage
becomes 9.5 V or less and the contact point of the sole-
noid relay does not become ON.
ABS SOL relay
ABS SOL relay circuit
C0279/12
Immediately after ECU terminal IG1 becomes ON, and
solenoid relay is OFF, however, when the condition that
the solenoid relay due to the contact point is ON continues
for 0.2 sec. or more.
055VW-02
F41980
ABS R/B
ABS SOL Relay
ABS No. 3
ALT
Battery
AST
6
R+
1
SR
10
2
3
1A
1
1E
7
1
2
1
2
W
1
Engine Room R/B
B-G
2
2
2
2
5
1
W
BS
GR-R
GR
W-L
23
24
A5
ABS & Traction Actuator
ABS No. 4
1
2
2
2
R
FL MAIN
S5
S8
S8
Skid Control ECU
W-G
1
B-G
Engine Room J/B
AST
-
DIAGNOSTICS
ABS WITH EBD & BA & TRAC & VSC SYSTEM
05-327
480
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
Start the inspection from step 1 in case of using 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 SOLENOID RELAY
OPERATION)
(a)
Select the item ”ABS SOL RELAY” in the ACTIVE TEST and operate the ABS solenoid relay on the
hand-held tester.
(b)
Check the operation sound of the ABS solenoid relay when operating it with the hand-held tester.
OK: The operation sound of the ABS solenoid relay should be heard.
OK
NG
F41243
ABS Solenoid Relay
ABS R/B
F09760
5
Continuity
Open
3
2
1
2
5
1
3
Continuity
2
1
3
5
4
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DIAGNOSTICS
ABS WITH EBD & BA & TRAC & VSC SYSTEM
481
2002 LEXUS ES300 REPAIR MANUAL (RM911U)
2
CHECK TERMINAL VOLTAGE(ABS SOLENOID RELAY 5 TERMINAL OF ABS R/B)
(a)
Remove the ABS solenoid relay from ABS R/B .
(b)
Measure the voltage between terminal 5 of ABS R/B (for
ABS solenoid relay) and body ground.
OK: 10 - 14 V
NG
OK
3
INSPECT ABS SOLENOIDO RELAY
(a)
Check continuity between each terminal of ABS SOL
relay.
OK:
Terminals 1 and 2
Continuity (Reference value 62
Ω
)
Terminals 3 and 5
Open
(b)
Apply battery positive voltage between terminals 1 and 2.
(c)
Check continuity between terminals 3 and 5 of ABS SOL
relay.
OK:
Terminals 3 and 5
Continuity
NG
REPLACE ABS SOLENOIDO RELAY
OK
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