Lexus ES300 (1997 year). Manual — part 377
F00042
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
Open
Continuity
Continuity
Open
Continuity
(+)
(–)
–
DIAGNOSTICS
ABS & TRACTION CONTROL SYSTEM
DI–285
437
1997 LEXUS ES300 (RM511U)
3
Check ABS & TRAC solenoid relay.
PREPARATION:
Remove ABS & TRAC solenoid relay from Engine Room R/B
No. 3.
CHECK:
Check continuity between each terminal of ABS & TRAC sole-
noid relay.
OK:
Terminals 4 and 6
Continuity (Reference value 80
Ω
)
Terminals 2 and 3
Continuity
Terminals 1 and 3
Open
CHECK:
(a)
Apply battery positive voltage between terminals 4 and 6.
(b)
Check continuity between each terminal of ABS & TRAC
solenoid relay.
OK:
Terminals 2 and 3
Open
Terminals 1 and 3
Continuity
NG
Replace ABS & TRAC solenoid relay.
OK
4
Check for open and short in harness and connector between ABS & TRAC sole-
noid relay and ABS & TRAC ECU (See page
NG
Repair or replace harness or connector.
OK
If the same code is still output after the DTC is deleted, check the contact condition of each con-
nection.
If the connector are normal, the ECU may be defective.
F00082
ALT
Engine Room R/B No. 3
2
ABS & TRAC
Motor Relay
A7
ABS & TRAC Actuator
ABS
4
W–R
MT
R+
GR–L
14
24
MR
A19
1
3
F9
F6
B–G
FL
Block
EB
MAIN
Battery
EA
1
B–G
3
3
3
1
2
3
A7
A7
1
2
3
W–B
W–B
W–B
A19
A19
GR–R
R–W
1
ABS & TRAC ECU
1
ALT
Engine Room R/B No. 3
2
ABS & TRAC
Motor Relay
A7
ABS & TRAC Actuator
ABS
4
W–R
MT
R+
GR–L
14
24
MR
A19
1
3
F9
F6
B–G
FL
Block
EB
MAIN
Battery
EA
1
B–G
3
3
3
1
2
3
A7
A7
1
2
3
W–B
W–B
W–B
A19
A19
GR–R
R–W
1
ABS & TRAC ECU
1
DI–286
–
DIAGNOSTICS
ABS & TRACTION CONTROL SYSTEM
438
1997 LEXUS ES300 (RM511U)
DTC
13, 14
ABS & TRAC Motor Relay Circuit
CIRCUIT DESCRIPTION
The ABS & TRAC motor relay supplies power to the ABS & TRAC pump motor. While the ABS is activated,
the ECU switches the ABS & TRAC motor relay ON and operates the ABS & TRAC pump motor.
DTC No.
DTC Detecting Condition
Trouble Area
13
Conditions (1) to (3) are detected:
(1) Malfunction of motor relay monitor.
(2) Battery voltage will not exceed more than 17.0 V
within 2.16 sec.
(3) Battery voltage will not become less than 9.5 V within
2.16 sec., or after the motor relay is ON and motor
relay monitor does not ON.
ABS & TRAC motor relay
ABS & TRAC motor relay circuit
ECU
14
Motor relay is OFF, and motor relay monitor is ON
continues for 20.16 sec. or more.
Fail safe function: If trouble occurs in the ABS & TRAC motor relay circuit, the ECU cuts off current to the
ABS & TRAC solenoid relay and prohibits ABS control and TRAC control.
WIRING DIAGRAM
DI0C3–01
F00049
1
2
3 4
(+)
(–)
Engine Room
R/B No. 3
1
2
3 4
(+)
(–)
Engine Room
R/B No. 3
1
2
3 4
(+)
(–)
Engine Room
R/B No. 3
1
2
3 4
(+)
(–)
Engine Room
R/B No. 3
F00056
ABS & TRAC
Motor
Relay
M
2
A19
MT
3
2
2
3
ABS & TRAC
Actuator
ECU
ABS & TRAC
Motor
Relay
M
2
A19
MT
3
2
2
3
ABS & TRAC
Actuator
ECU
ABS & TRAC
Motor
Relay
M
2
A19
MT
3
2
2
3
ABS & TRAC
Actuator
ECU
A7
ABS & TRAC
Motor
Relay
A7
M
2
A19
MT
3
2
2
3
ABS & TRAC
Actuator
ECU
–
DIAGNOSTICS
ABS & TRACTION CONTROL SYSTEM
DI–287
439
1997 LEXUS ES300 (RM511U)
INSPECTION PROCEDURE
1
Check voltage between terminal 1 of Engine Room R/B No. 3 (for ABS & TRAC
motor relay) and body ground.
PREPARATION:
Remove ABS & TRAC motor relay from Engine Room R/B No.
3.
CHECK:
Measure voltage between terminal 1 of Engine Room R/B No.
3 (for ABS & TRAC motor relay) and body ground.
OK:
Voltage: 10 – 14 V
NG
Check and repair harness or connector.
OK
2
Check continuity between terminal 2 of ABS & TRAC motor relay and terminal
MT of ABS & TRAC ECU.
CHECK:
Check continuity between terminal 2 of ABS & TRAC motor
relay and terminal MT of ABS & TRAC ECU.
OK:
Continuity
HINT:There is a resistance of 33
Ω
between terminals A7 – 2
and A7 – 3 of ABS & TRAC actuator.
NG
Repair or replace harness or ABS & TRAC
actuator.
OK
F00044
1
2
3
4
1
2
3
4
1
2
3
4
Continuity
Open
Continuity
(+)
(–)
DI–288
–
DIAGNOSTICS
ABS & TRACTION CONTROL SYSTEM
440
1997 LEXUS ES300 (RM511U)
3
Check ABS & TRAC motor relay.
PREPARATION:
Remove ABS & TRAC motor relay from Engine Room R/B No.
3.
CHECK:
Check continuity between each terminal of ABS & TRAC motor
relay.
OK:
Terminals 3 and 4
Continuity (Reference value 62
Ω
)
Terminals 1 and 2
Open
CHECK:
(a)
Apply battery positive voltage between terminals 3 and 4.
(b)
Check continuity between terminals of ABS & TRAC mo-
tor relay.
OK:
Terminals 1 and 2
Continuity
NG
Replace ABS & TRAC motor relay.
OK
4
Check for open and short in harness and connector between ABS & TRAC motor
relay and ABS & TRAC ECU (See page
NG
Repair or replace harness or connector.
OK
If the same code is still output after the DTC is deleted, check the contact condition of each con-
nection.
If the connections are normal, the ECU may be defective.
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст