LEXUS LS430 2003 Factory Repair Manual

Fig. 25: Vehicle Overview
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Fig. 26: Front Seats

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 27: Rear Seat
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 28: Vehicle Overview
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 29: Vehicle Overview
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 30: Vehicle Overview
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 31: Front Seats
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 32: Rear Seat Assembly
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

PRECAUTION
SYSTEM REFERENCE TABLE
HINT:
Initialization can not be completed by only disconnecting the battery terminal.
DEFINITION OF TERMS
DEFINITION OF TERMS REFERENCE
System NameProceed To
Front Power Seat Control SystemINITIALIZATION
TermDefinition
Monitor descriptionDescription of what the ECM monitors and how it
detects malfunctions (monitoring purpose and its
details).
Related DTCsA group of diagnostic trouble codes that are output
by the ECM based on the same malfunction
detection logic.
Typical enabling conditionPreconditions that allow the ECM to detect
malfunctions. With all preconditions satisfied, the
ECM sets the DTC when the monitored value(s)
exceeds the malfunction threshold(s).
Sequence of operationThe priority order that is applied to monitoring, if
multiple sensors and components are used to detect
the malfunction. While another sensor is being
monitored, the next sensor or component will not
be monitored until the previous monitoring has
concluded.
Required sensor/componentsThe sensors and components that are used by the
ECM to detect malfunctions.
Frequency of operationThe number of times that the ECM checks for

PART AND SYSTEM NAME LIST
This reference list indicates the part names used in this article along with their definitions.
PART AND SYSTEM REFERENCE TABLE
malfunctions per driving cycle. "Once per driving
cycle" means that the ECM detects malfunction
only one time during a single driving cycle.
"Continuous" means that the ECM detects
malfunction every time when enabling condition is
met.
DurationThe minimum time that the ECM must sense a
continuous deviation in the monitored value(s)
before setting a DTC. This timing begins after the
"typical enabling conditions" are met.
Malfunction thresholdsBeyond this value, the ECM will conclude that
there is a malfunction and set a DTC.
MIL operationMIL illumination timing after a defect is detected.
"Immediately" means that the ECM illuminates
MIL the instant the ECM determines that there is a
malfunction. "2 driving cycle" means that the ECM
illuminates MIL if the same malfunction is detected
again in the 2nd driving cycle.
Component operating rangeNormal operation range of sensors and solenoids
under normal driving conditions. Use these ranges
as a reference. They cannot be used to judge if a
sensor or solenoid is defective or not.
Part and system nameDefinition
Toyota HCAC system, Hydrocarbon adsorptive
Catalyst (HCAC) system, HC adsorptive three-way
catalystHC adsorptive three-way catalytic converter
Variable Valve Timing sensor, VVT sensorCamshaft position sensor
Variable valve timing system, VVT systemCamshaft timing control system
Camshaft timing oil control valve, Oil control valve
OCV, VVT, VSVCamshaft timing oil control valve
Variable timing and lift, VVTLCamshaft timing and lift control
Crankshaft position sensor "A"Crankshaft position sensor
Engine speed sensorCrankshaft position sensor
THAIntake air temperature
Knock control moduleEngine knock control module
Knock sensorEngine knock sensor
Mass or volume air flow circuitMass air flow sensor circuit
Vacuum sensorManifold air pressure sensor
Internal control module, Control module, Engine Power train control module

control ECU, PCM
FC idleDeceleration fuel cut
Idle air control valveIdle speed control
VSV for CCV, Canister close valve VSV for
canister controlEvaporative emissions canister vent valve
VSV for EVAP, Vacuum switching valve assembly
No. 1, EVAP VAV, Purge VSVEvaporative emissions canister purge valve
VSV for pressure switching valve, Bypass VSVEvaporative emission pressure switching valve
Vapor pressure sensor, EVAP pressure sensor,
Evaporative emission control system pressure
sensorFuel tank pressure sensor
Charcoal canisterEvaporative emissions canister
ORVR systemOn-boad refueling vapor recovery system
Intake manifold runner controlIntake manifold tuning system
Intake manifold runner valve, IMRV, IACV (runner
valve)Intake manifold tuning valve
Intake control VSVIntake manifold tuning solenoid valve
AFSAir fuel ratio sensor
O2 sensorHeater oxygen sensor
Oxygen sensor pumping current circuitOxygen sensor output signal
Oxygen sensor reference ground circuitOxygen sensor signal ground
Accel position sensorAccelerator pedal position sensor
Throttle actuator control motor, Actuator control
motor, Electronic throttle motor, Throttle control
motorElectronic throttle actuator
Electronic throttle control system, Throttle actuator
control systemElectronic throttle control system
Throttle/pedal position sensor, Throttle/pedal
position switch, Throttle position sensor/switchThrottle position sensor
Turbo press sensorTurbocharger pressure sensor
Turbo VSVTurbocharger pressure control solenoid valve
P/S pressure switchPower-steering pressure switch
VSV for ACMActive control engine mount
Speed sensor, Vehicle speed sensor "A", Speed
sensor for skid control ECUVehicle speed sensor
ATF temperature sensor, Trans, fluid temp, sensor,
ATF temperature sensor "A"Transmission fluid temperature sensor
Electronic controlled automatic transmission, ECTElectronically controlled automatic
Intermediate shaft speed sensor "A"Counter gear speed sensor
Part and system nameDefinition
Output speed sensorOutput shaft speed sensor
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Speed sensor (NT), Turbine speed sensorInput turbine speed sensor