2003 LEXUS LS430 sensor

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

This function minimizes the loss of the ECT functions when any malfunction occurs in each sensor or
solenoid.
Fig. 40: Identifying Fail
-Safe Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
*1: Al (Artificial Intelligence) -SHIFT control
In addition to the switching of the shift pattern through the pattern select switch, the AI-SHIFT control
enables the ECM to estimate the road conditions and the driver's intention in order to automatically select
the optimal shift pattern. As a result, a comfortable ride has been realized.
a. Fail-safe operation for electronically malfunctioning shift solenoid valve (S1, S2, S3, S4 and SR):
HINT:
Fail-safe operation in the event of an electric system malfunction.
Fail safe function:
If either of the shift solenoid valve circuits has an open or short failure, the ECM turns the other
shift solenoid "ON" and "OFF" in order to shift into the gear positions shown in the table below.
In case of a short circuit, the ECM stops sending current to the short circuited solenoid.
Even if starting the engine again in the fail-safe mode, the gear position remains in the same
position.

b. Fail-safe operation for mechanically malfunction:
HINT:
Fail-safe operation in the event of a mechanical system malfunction.
Fail safe function:
The ECM controls the gear position as shown in the table below when malfunctions occur.
Fig. 43: Identifying Mechanical Malfunction Chart

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
DATA LIST/ACTIVE TEST
1.DATA LIST
HINT:
According to the DATA LIST displayed by the hand-held tester, you can read the value of the switch,
sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of
troubleshooting is one method to shorten labor time.

Fig. 46: Test Item Reference Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
HINT:
The pressure values in ACTIVE TEST and HYDRAULIC TEST are different from each other.
DIAGNOSTIC TROUBLE CODE CHART
If a DTC is displayed during the DTC check, check the parts listed in the table below.
DTC LIST
DTCDescription
DTC P0705, P0850TRANSMISSION RANGE SENSOR CIRCUIT
MALFUNCTION (PRNDL INPUT),
PARK/NEUTRAL SWITCH INPUT CIRCUIT
DTC P0710, P0712, P0713TRANSMISSION FLUID TEMPERATURE
SENSOR "A" CIRCUIT LOW/HIGH INPUT
DTC P0711TRANSMISSION FLUID TEMPERATURE
SENSOR "A" PERFORMANCE
DTC P0717TURBINE SPEED SENSOR CIRCUIT NO SIGNAL
DTC P0724BRAKE SWITCH "B" CIRCUIT HIGH
DTC P0729GEAR 6 INCORRECT RATIO
DTC P0748PRESSURE CONTROL SOLENOID "A"
ELECTRICAL (SHIFT SOLENOID VALVE SL1)

Fig. 48: Diagnostic Trouble Code Reference Chart (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
DTC P0705, P0850: TRANSMISSION RANGE SENSOR CIRCUIT MALFUNCTION (PRNDL INPUT),
PARK/NEUTRAL SWITCH INPUT CIRCUIT

P0850:
MONITOR STRATEGY TABLE - P0850
TYPICAL ENABLING CONDITIONS
P0705:
TYPICAL ENABLING CONDITIONS TABLE - P0705
P0850:
All of following conditions are met
TYPICAL ENABLING CONDITIONS TABLE - P0850
TYPICAL MALFUNCTION THRESHOLDS
P0705:
Required sensors/ComponentsPark/neutral position switch
Frequency of operationContinuous
DurationCondition (A) and (B) 2 sec. Condition (C) 60 sec.
MIL operation2 driving cycles
Sequence of operationNone
Related DTCsP0850: Park/neutral position switch/Verify switch
input
Required sensors/ComponentsPark/neutral position switch
Frequency of operationContinuous
Duration30 sec.
MIL operation2 driving cycle
Sequence of operationNone
The monitor will run whenever this DTC is not
present.See LIST OF DISABLE A MONITOR
Ignition switchON
Battery voltage10.5 V or more
The monitor will run whenever this DTC is not
present.See LIST OF DISABLE A MONITOR
Vehicle speed70 km/h (43.47 mph) or more
Engine speed1,000 rpm or more and 2,500 rpm or less
Intake air amount per revolution0.8 g/rev or more
Battery voltage8 V or more
Ignition switchON
StarterOFF

According to the DATA LIST displayed by the hand-held tester, you can read the value of the switch, sensor,
actuator and so on without parts removal. Reading the DATA LIST as the first step of troubleshooting is one
method to shorten labor time.
a. Turn the ignition switch off.
b. Connect the hand-held tester together with the CAN VIM (controller area network vehicle interface
module) to the DLC3.
c. Turn the ignition switch to the ON position.
d. Push the "ON" button of the OBD II scan tool or the hand-held tester.
e. Select the item "DIAGNOSIS/ENHANCED OBD II/DATA LIST".
f. According to the display on tester, read the "DATA LIST".
Fig. 51: Test Item Reference Chart

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
1.INSPECT PARK/NEUTRAL POSITION SWITCH ASSY
a. Disconnect the park/neutral position switch connector.
b. Measure resistance according to the value(s) in the table below when the shift lever is moved to
each position.