2003 LEXUS LS430 replacement

LS430 SPECIFICATIONS INDEX
SystemSpecification/Procedure
Air Conditioning
ServiceSERVICE DATA
TorqueTORQUE SPECIFICATION
Axle Nut/Hub Nut
Front69 N.m (700 kgf.cm, 51 ft.lbf)
Rear290 N.m (2,960 kgf.cm, 214 ft.lbf)
BatteryNA
Brakes
Bleeding
SequenceBLEEDING
Disc BrakesSERVICE DATA
TorqueTORQUE SPECIFICATION
Charging
GeneratorSERVICE DATA
TorqueTORQUE SPECIFICATION
Drive Belts
AdjustmentREPLACEMENT
Belt RoutingDRIVE BELT
Engine Cooling
General Service
SpecificationsSERVICE DATA
Radiator Cap
PressureStandard Value
93 to 123 kPa (0.95 to 1.25 kgf/cm
2 , 13.5 to 17.8 psi)
Minimum Standard Value
78 kPa (0.8 kgf/cm
2 , 11.4 psi)
Thermostat R & ITHERMOSTAT
Water Pump R &
IWATER PUMP
Engine Mechanical
CompressionSERVICE DATA
Oil Pressureat idle, 29 kPa (0.3 kgf.cm2 , 43 psi) or more
at 3,000 rpm, 294 to 588 kPa (3.0 to 6.0 kgf.cm
2 , 43 to 85 psi)
OverhaulSERVICE DATA
TorqueTORQUE SPECIFICATION

Fig. 47: Normal Signal Waveform
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE REPLACEMENT
)
4.INSPECT FRONT SPEED SENSOR

f. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION SPECIFIED CONDITION LH:
TESTER CONNECTION SPECIFIED CONDITION RH:
NG: REPLACE FRONT SPEED SENSOR (SEE REPLACEMENT
)
Tester ConnectionSpecified Condition
(Connector A-1) - Body ground1 Mohms or higher
(Connector A-2) - Body ground1 Mohms or higher
Tester ConnectionSpecified Condition
(Connector A-1) - Body ground1 Mohms or higher
(Connector A-2) - Body ground1 Mohms or higher

As the vehicle speed (Wheel revolution speed) increases, a cycle of the waveform narrows and the
fluctuation in the output voltage becomes greater.
When noise is identified in the waveform on the oscilloscope, error signals are generated due to the
speed sensor rotor's scratches, looseness or foreign matter attached to it.
NG: Go to step 7
Fig. 51: Normal Signal Waveform

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE REPLACEMENT
)
7.INSPECT FRONT SPEED SENSOR INSTALLATION
a. Check the speed sensor installation.
OK: Go to next step

There is no clearance between the sensor and the front steering knuckle.
NG: REPLACE FRONT SPEED SENSOR
Fig. 52: Inspecting Front Speed Sensor Gap

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE REPLACEMENT
)
CIRCUIT DESCRIPTION

fluctuation in the output voltage becomes greater.
When noise is identified in the waveform on the oscilloscope, error signals are generated due to the
speed sensor rotor's scratches, looseness or foreign matter attached to it.
NG: Go to step 7
OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE REPLACEMENT
)
4.INSPECT REAR SPEED SENSOR
Fig. 56: Inspecting Rear Speed Sensor

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Remove the rear seat cushion and seatback.
b. Make sure that the speed sensor connector and the wire harness side connector are securely
connected.
c. Disconnect the speed sensor connector.
d. Measure the resistance accordin
g to the value (s) in the table below.

Standard:
TESTER CONNECTION SPECIFIED CONDITION LH:
TESTER CONNECTION SPECIFIED CONDITION RH:
e. Measure the resistance according to the value (s) in the table below.
Standard:
TESTER CONNECTION SPECIFIED CONDITION LH:
TESTER CONNECTION SPECIFIED CONDITION RH:
NG: REPLACE REAR SPEED SENSOR (SEE REPLACEMENT
)
OK: Go to next step
5.CHECK HARNESS AND CONNECTOR (REAR SPEED SENSOR - SKID CONTROL ECU)
Tester ConnectionSpecified Condition
(A31-1) - (A31-2)0.6 to 1.8 kohms
Tester ConnectionSpecified Condition
(A30-1) - (A30-2)0.6 to 1.8 kohms
Tester ConnectionSpecified Condition
(A31-1) - Body ground1 Mohms or higher
(A31-2) - Body ground1 Mohms or higher
Tester ConnectionSpecified Condition
(A30-1) - Body ground1 Mohms or higher
(A30-2) - Body ground1 Mohms or higher

OK: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE REPLACEMENT )
7.INSPECT REAR SPEED SENSOR INSTALLATION
Fig. 59: Inspecting Rear Speed Sensor Gap

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
a. Check the sensor installation.
OK: Go to next step
There is no clearance between the sensor and rear axle carrier.
The installation bolt is tightened properly.
Torque: 8.0 N.m (82 kgf.cm, 71 in..lbf)