LEXUS LS430 2003 Factory Repair Manual

SENDING UNITS & SENSORS LOCATION
Rear Door W/Motor Lock Assembly LHIn left rear door. See Fig. 29 .
Rear Door W/Motor Lock Assembly RHIn right rear door. See Fig. 29 .
Seat Belt Motor LHBase of left "B" pillar. See Fig. 30 .
Seat Belt Motor RHBase of right "B" pillar. See Fig. 30 .
Seat Climate Fan Motor Rear LH (Seat Back)In left rear seat back. See Fig. 32 .
Seat Climate Fan Motor Rear LH (Seat Cushion)In left rear seat cushion. See Fig. 32 .
Seat Climate Fan Motor Rear RH (Seat Back)In right rear seat back. See Fig. 32 .
Seat Climate Fan Motor Rear RH (Seat Cushion)In right rear seat cushion. See Fig. 32 .
Shoulder Belt Anchor Motor & Position Sensor
(Left)Near center of left "B" pillar. See Fig. 30 .
Shoulder Belt Anchor Motor (Right)Near center of right "B" pillar. See Fig. 30 .
StarterCenter rear of engine. See Fig. 15 .
Suspension Control Actuator Front LHOn left side of engine compartment. See Fig. 15 .
Suspension Control Actuator Front RHOn right side of engine compartment. See Fig. 15 .
Suspension Control Actuator Rear LHNear base of left "C" pillar. See Fig. 30 .
Suspension Control Actuator Rear RHNear base of right "C" pillar. See Fig. 30 .
Telescopic Motor & Position SensorInside base of steering column. See Fig. 18 .
Tilt Motor & Position SensorInside base of steering column. See Fig. 18 .
Washer MotorOn washer fluid reservoir, below left headlight. See
Fig. 15
.
Water Valve Servo MotorCenter of dash. See Fig. 18 .
ComponentLocation
ABS Speed Sensor Front LHAt left rear of engine compartment. See Fig. 12 .
ABS Speed Sensor & Pad Wear Indicator SW Front
RHRight rear of engine compartment. See Fig. 12 .
ABS Speed Sensor & Pad Wear Indicator SW Rear
RHAt right rear wheel assembly. See Fig. 19 .
ABS Speed Sensor Rear LHAt left rear wheel assembly. See Fig. 19 .
A/C Ambient Temp. SensorBehind left side of bumper fascia. See Fig. 12 .
Acceleration SensorOn left side of luggage compartment, behind left
rear fenderwell. See Fig. 19
.
Accel Position SensorBehind left center of dash. See Fig. 2 .
A/C Pressure SensorOn left front of engine compartment. See Fig. 12 .
A/C Room Temperature SensorBehind left center of dash. See Fig. 2 .
A/C Solar Sensor (Rear)Near center of rear speaker shelf, at base of rear
window. See Fig. 19
.
Airbag Sensor AssemblyFront of center console. See Fig. 2 .
Air Bag Sensor Front LHOn left front of engine compartment. See Fig. 12 .

Air Bag Sensor Front RHOn right front of engine compartment. See Fig. 12 .
Automatic Light Control Sensor & A/C Solar
Sensor (Front)Behind upper center of dash. See Fig. 2 .
Camshaft Position SensorOn front of left cylinder head. See Fig. 12 .
Crankshaft Position SensorOn left front of engine. See Fig. 12 .
Duct Sensor (Driver's Side)Behind upper left side of dash. See Fig. 16 .
Duct Sensor (Front Passenger's Side)Behind upper right side of dash. See Fig. 16 .
Engine Coolant Temp. SensorOn front center of engine. See Fig. 12 .
Engine Oil Level SensorOn left center of engine. See Fig. 12 .
Exhaust Gas SensorOn right side of engine, on exhaust system. See Fig.
12 .
Fuel Pump & Fuel Sender (Main)Under left rear of vehicle, forward of left rear
fenderwell. See Fig. 19
.
Fuel Sender (Sub)Under right rear of vehicle, forward of right rear
fenderwell. See Fig. 19
.
Heated Oxygen Sensor (Bank 1 Sensor 1)On exhaust system, on left side of engine. See Fig.
13 .
Heated Oxygen Sensor (Bank 1 Sensor 2)On exhaust system, below vehicle. See Fig. 16 .
Heated Oxygen Sensor (Bank 2 Sensor 1)On exhaust system, on right side of engine. See Fig.
13 .
Heated Oxygen Sensor (Bank 2 Sensor 2)On exhaust system, below vehicle. See Fig. 16 .
Height Control Sensor Front LHInside left front fenderwell, attached to suspension
control arm. See Fig. 13
.
Height Control Sensor Front RHInside right front fenderwell, attached to suspension
control arm. See Fig. 13
.
Height Control Sensor RearUnder center rear of vehicle. See Fig. 28 .
Height Control Sensor Rear LHLeft rear of luggage compartment. See Fig. 28 .
Height Control Sensor Rear RHRight side of luggage compartment. See Fig. 28 .
Knock Sensor LHOn left side of engine. See Fig. 14 .
Knock Sensor RHOn right side of engine. See Fig. 14 .
Laser SensorBehind right side of front bumper fascia. See Fig.
14 .
Magnetic Field SensorBehind center of dash. See Fig. 17 .
Mass Airflow MeterOn right side of engine compartment, near air box.
See Fig. 14
.
Millimeter Wave Radar SensorFront of engine compartment. See Fig. 14 .
Power Seat Motor And Position Sensor (Driver's
Seat Head Rest Control)In right side of driver's seat back. See Fig. 31 .
Power Seat Motor & Position Sensor (Rear
Passenger's LH Seat Head Rest Top & Bottom
Control)
In left side of rear seat. See Fig. 32 .
Power Seat Motor & Position Sensor (Rear
Passenger's RH Seat Head Rest Top & Bottom In right side of rear seat. See Fig. 32 .

Control)
Power Seat Position Sensor (Driver's Seat Cushion
Control)In lower left side of driver's seat cushion. See Fig.
31 .
Power Seat Position Sensor (Driver's Seat Front
Vertical Control)At lower right side of driver's seat cushion. See Fig.
31 .
Power Seat Position Sensor (Driver's Seat Lifter
Control)In driver's seat assembly. See Fig. 31 .
Power Seat Position Sensor (Driver's Seat Reclining
Control)In lower left side of driver's seat. See Fig. 31 .
Power Seat Position Sensor (Driver's Seat Slide
Control)Lower left side of driver's seat. See Fig. 31 .
Power Seat Position Sensor (Rear Passenger's LH
Seat Slide Control)In left side of rear seat. See Fig. 32 .
Power Seat Position Sensor (Rear Passenger's RH
Seat Slide Control)In right side of rear seat. See Fig. 32 .
Rain SensorNear top center of windshield. See Fig. 29 .
Side Air Bag Sensor Front LHNear base of left "B" pillar. See Fig. 30 .
Side Air Bag Sensor Front RHNear base of right "B" pillar. See Fig. 30 .
Side Air Bag Sensor Rear LHNear lower rear of left rear door opening. See Fig.
30 .
Side Air Bag Sensor Rear RHNear lower rear of right rear door opening. See Fig.
30 .
Smoke SensorCenter rear of vehicle. See Fig. 30 .
Steering SensorInside top of steering column. See Fig. 17 .
Telescopic Motor & Position SensorInside base of steering column. See Fig. 2 .
Throttle Position Sensor & MotorOn throttle body. See Fig. 15 .
Tilt Motor & Position SensorInside base of steering column. See Fig. 2 .
Turbine Speed SensorIn transmission. See Fig. 15 .
Ultrasonic Sensor (Front Left)Behind front bumper fascia. See Fig. 15 .
Ultrasonic Sensor (Front Left Center)Behind front bumper fascia. See Fig. 15 .
Ultrasonic Sensor (Front Left Side)Behind front bumper fascia. See Fig. 15 .
Ultrasonic Sensor (Front Right)Behind front bumper fascia. See Fig. 15 .
Ultrasonic Sensor (Front Right Center)Behind front bumper fascia. See Fig. 15 .
Ultrasonic Sensor (Front Right Side)Behind front bumper fascia. See Fig. 15 .
Ultrasonic Sensor (Rear Left)Behind rear bumper fascia. See Fig. 30 .
Ultrasonic Sensor (Rear Left Center)Behind rear bumper fascia. See Fig. 30 .
Ultrasonic Sensor (Rear Right)Behind rear bumper fascia. See Fig. 30 .
Ultrasonic Sensor (Rear Right Center)Behind rear bumper fascia. See Fig. 30 .
Vapor Pressure SensorBelow right rear of vehicle. See Fig. 30 .
Vehicle Speed SensorOn transmission. See Fig. 15 .
VVT Sensor LHOn left side of engine. See Fig. 15 .
VVT Sensor RHOn right side of engine. See Fig. 15 .

SOLENOIDS & SOLENOID VALVES LOCATION
SWITCHES LOCATION
Washer Level SensorOn washer fluid reservoir, below left headlight. See
Fig. 15
.
Yaw Rate SensorBelow rear of center console. See Fig. 18 .
ComponentLocation
Camshaft Timing Oil Control Valve LHOn front of left cylinder head. See Fig. 12 .
Camshaft Timing Oil Control Valve RHOn front of right cylinder head. See Fig. 12 .
Electronically Controlled Transmission SolenoidOn left side of transmission. See Fig. 12 .
Front Height Control ValveOn right front of engine compartment. See Fig. 13 .
Heated Control Exhaust ValveRight front of vehicle, behind bumper. See Fig. 13 .
PPS SolenoidOn left front of engine compartment. See Fig. 15 .
Rear Height Control ValveNear front of engine compartment. See Fig. 29 .
Rear Magnetic ValveIn rear luggage compartment. See Fig. 29 .
Tension Reducer Solenoid LHNear base of left "B" pillar. See Fig. 30 .
Tension Reducer Solenoid RHNear base of left "B" pillar. See Fig. 30 .
VSV (ACIS)On right rear of engine. See Fig. 15 .
VSV (Canister Closed Valve)On right side of engine compartment. See Fig. 15 .
VSV (EVAP)On left rear of engine. See Fig. 15 .
VSV (Pressure Switching Valve)Below right rear of vehicle. See Fig. 30 .
ComponentLocation
Brake Fluid Level Warning SwitchOn brake master cylinder reservoir. See Fig. 12 .
Brake Pedal Load Sensing SwitchOn brake pedal bracket, above brake pedal. See Fig.
2 .
Buckle SW Front LHInside of left front seat belt buckle. See Fig. 31 .
Buckle SW Front RHInside of right front seat belt buckle. See Fig. 31 .
Climate Control Seat SW (Rear)In rear seat assembly. See Fig. 32 .
Door Courtesy SW Front LHAt left "B" pillar. See Fig. 19 .
Door Courtesy SW Front RHAt right "B" pillar. See Fig. 19 .
Door Courtesy SW Rear LHAt left "C" pillar. See Fig. 19 .
Door Courtesy SW Rear RHAt right "C" pillar. See Fig. 19 .
Door Key Lock Motor & Door Unlock Detection
SW Front RHIn right front door. See Fig. 19 .
Door Key Lock & Unlock SW & Door Lock Motor
& Door Unlock Detection SW Front LHIn driver's door. See Fig. 19 .
Door Lock Motor & Door Unlock Detection SW

MISCELLANEOUS LOCATION
Rear LHIn left rear door. See Fig. 19 .
Door Lock Motor & Door Unlock Detection SW
Rear RHIn right rear door. See Fig. 19 .
Engine Hood Courtesy SWNear hood latch, on front center of engine
compartment. See Fig. 12
.
Head Rest Limit SW Rear LHIn rear seat assembly. See Fig. 32 .
Head Rest Limit SW Rear RHIn rear seat assembly. See Fig. 32 .
Luggage Compartment Door Key Unlock SWIn luggage compartment. See Fig. 28 .
Luggage Electrical Key SWIn luggage compartment decklid. See Fig. 28 .
Oil Pressure SwitchOn lower left front of engine. See Fig. 15 .
Parking Brake SwitchBehind left end of dash, on parking brake
mechanism. See Fig. 17
.
Park/Neutral Position SwitchOn right side of transmission. See Fig. 15 .
Power Seat Control SW (Rear Seat)Left side of rear seat. See Fig. 32 .
Pressure SwitchLower left side of dash. See Fig. 17 .
Rear Armrest Courtesy SWIn rear seat. See Fig. 32 .
Rear Sunshade SW (Rear)In center of rear seat. See Fig. 32 .
Stoplight SwitchAbove brake pedal, on bracket. See Fig. 18 .
ComponentLocation
A/C AmplifierIn luggage compartment. See Fig. 4 .
Airbag Squib (Front Passenger Airbag Assembly)Right side of dash. See Fig. 2 .
Airbag Squib (Steering Wheel Pad)In steering wheel. See Fig. 2 .
Curtain Shield Airbag Squib LHLeft "C" pillar. See Fig. 19 .
Curtain Shield Airbag Squib RHRight "C" pillar. See Fig. 19 .
Data Link Connector 3Below left side of dash. See Fig. 16 .
Door Oscillator Front LHIn left front door. See Fig. 19 .
Door Oscillator Front RHIn right front door. See Fig. 19 .
Door Oscillator Rear LHIn left rear door. See Fig. 19 .
Door Oscillator Rear RHIn right rear door. See Fig. 19 .
GeneratorRight front of engine. See Fig. 13 .
Horn (High)On center radiator support. See Fig. 13 .
Horn (Low)On center radiator support. See Fig. 13 .
Ignition Coil & Ignitor No. 1Above No. 1 spark plug. See Fig. 14 .
Ignition Coil & Ignitor No. 2Above No. 2 spark plug. See Fig. 14 .
Ignition Coil & Ignitor No. 3Above No. 3 spark plug. See Fig. 14 .
Ignition Coil & Ignitor No. 4Above No. 4 spark plug. See Fig. 14 .
Ignition Coil & Ignitor No. 5Above No. 5 spark plug. See Fig. 14 .
Ignition Coil & Ignitor No. 6Above No. 6 spark plug. See Fig. 14 .

Ignition Coil & Ignitor No. 7Above No. 7 spark plug. See Fig. 14 .
Ignition Coil & Ignitor No. 8Above No. 8 spark plug. See Fig. 14 .
Injector No. 1Left side of intake manifold. See Fig. 14 .
Injector No. 2Right side of intake manifold. See Fig. 14 .
Injector No. 3Left side of intake manifold. See Fig. 14 .
Injector No. 4Right side of intake manifold. See Fig. 14 .
Injector No. 5Left side of intake manifold. See Fig. 14 .
Injector No. 6Right side of intake manifold. See Fig. 14 .
Injector No. 7Left side of intake manifold. See Fig. 14 .
Injector No. 8Right side of intake manifold. See Fig. 14 .
Junction Connector No. 1Left front of engine compartment. See Fig. 14 .
Junction Connector No. 2Left front of engine compartment. See Fig. 14 .
Junction Connector No. 3Left front of engine compartment. See Fig. 14 .
Junction Connector No. 4Left front of engine compartment. See Fig. 14 .
Junction Connector No. 7Below engine room No. 1 J/B & engine room No. 1
R/B. See Fig. 14
.
Junction Connector No. 8Behind left end of dash. See Fig. 16 .
Junction Connector No. 9Behind left end of dash. See Fig. 16 .
Junction Connector No. 21Forward of left rear fenderwell. See Fig. 28 .
Junction Connector No. 26Near center of rear speaker shelf, at base of rear
window. See Fig. 28
.
Junction Connector No. 27Forward of right rear fenderwell. See Fig. 28 .
Junction Connector No. 31Behind left rear seat back. See Fig. 32 .
Junction Connector No. 33Left front of engine compartment. See Fig. 14 .
Junction Connector No. 34Left front of engine compartment. See Fig. 14 .
Junction Connector No. 35Left side of dash. See Fig. 16 .
Junction Connector No. 49Right rear of vehicle. See Fig. 28 .
Junction Connector No. 50Right rear of vehicle. See Fig. 28 .
Junction Connector No. 51 & 52Right rear of vehicle. See Fig. 28 .
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& 17Behind upper center of dash. See Fig. 16 .
Junction Connectors No. 18Behind upper right side of dash. See Fig. 16 .
Junction Connectors No. 22 & 23Rearward of left rear fenderwell. See Fig. 28 .
Junction Connectors No. 24 & 25On left rear of luggage compartment lid. See Fig.
28 .
Junction Connectors No. 28, 29 & 30Rearward of right rear fenderwell. See Fig. 28 .
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43Center of dash. See Fig. 16 .
Junction Connectors No. 44, 45, 46, 47, 48Right side of dash. See Fig. 16 .
Knee Airbag Squib LHLower left side of dash. See Fig. 17 .
Knee Airbag Squib RHLower right side of dash. See Fig. 17 .
Luggage Oscillator (Inner)Left rear of luggage compartment. See Fig. 28 .

CONNECTORS LOCATION
Luggage Oscillator (Outer)Behind right side of rear bumper. See Fig. 28 .
Noise FilterOn luggage room J/B. See Fig. 11 .
Noise Filter (Ignition) (Left Bank)On left rear of engine. See Fig. 15 .
Noise Filter (Ignition) (Right Bank)On right front of engine. See Fig. 15 .
Noise Filter (Rear Window Defogger)Behind left headlight. See Fig. 15 .
Pretensioner Front LHNear base of left "B" pillar. See Fig. 29 .
Pretensioner Front RHNear base of right "B" pillar. See Fig. 29 .
Pretensioner Rear LHNear base of left "C" pillar. See Fig. 29 .
Pretensioner Rear RHIn right rear door. See Fig. 29 .
Rear Window DefoggerAt rear window. See Fig. 29 .
RheostatLeft side of dash. See Fig. 18 .
Room Oscillator (Front)In center console. See Fig. 18 .
Room Oscillator (Rear)Center of passenger compartment. See Fig. 29 .
Seat Heater Front LHIn left front seat. See Fig. 31 .
Seat Heater Front RHIn right front seat. See Fig. 31 .
Seat Heater Rear LHIn left rear seat. See Fig. 32 .
Seat Heater Rear LHIn left side of rear seat. See Fig. 32 .
Seat Heater Rear RHIn right rear seat. See Fig. 32 .
Seat Heater Rear RHIn right side of rear seat. See Fig. 32 .
Short Connector 1Left front of engine compartment. See Fig. 15 .
Short Connector 2Left front of engine compartment. See Fig. 15 .
Short Connector 8 (Height Control)Right end of dash. See Fig. 18 .
Short Connector 9 (Height Control)Right end of dash. See Fig. 18 .
Short Connector 43Right end of dash. See Fig. 17 .
Short Connector 43Right end of dash. See Fig. 18 .
Side Airbag Squib LHIn left front seat. See Fig. 31 .
Side Airbag Squib RHIn right front seat. See Fig. 31 .
Stereo Component AmplifierOn right side of luggage compartment, behind trim.
See Fig. 4
.
Telephone Transceiver & Speaker RelayOn right side of luggage compartment. See Fig. 4 .
Theft Deterrent HornOn right rear of engine compartment. See Fig. 15 .
Transponder Key AmplifierOn right side of steering column. See Fig. 18 .
Vibrator LHIn left rear seat. See Fig. 32 .
Vibrator RHIn right rear seat. See Fig. 32 .
ComponentLocation
BA1 (White, 6 Pin)At left "B" pillar. See Fig. 23 .
BA2 (White, 10 Pin)At left "B" pillar. See Fig. 23 .

BB1 (White, 6 Pin)At right "B" pillar. See Fig. 23 .
BB2 (White, 10 Pin)At right "B" pillar. See Fig. 23 .
BC2 (White, 16 Pin)Left rear of luggage compartment. See Fig. 23 .
BD1 (White, 10 Pin)Behind left side of rear bumper. See Fig. 23 .
BE3 (White, 16 Pin)Behind right rear bumper. See Fig. 23 .
BE4 (Gray, 22 Pin)Behind right rear bumper. See Fig. 23 .
BF2 (White, 20 Pin)Under driver's seat. See Fig. 26 .
BG3 (White, 20 Pin)Under passenger seat. See Fig. 26 .
BH2 (White, 25 Pin)Lower left side of rear seat. See Fig. 27 .
BH3 (White, 17 Pin)Lower left side of rear seat. See Fig. 27 .
BI2 (White, 25 Pin)Right rear seat bottom. See Fig. 27 .
BI3 (White, 17 Pin)Right rear seat bottom. See Fig. 27 .
BJ1 (White, 10 Pin)In left front door. See Fig. 25 .
BK1 (White, 10 Pin)In right front door. See Fig. 25 .
BL1 (White, 10 Pin)In left rear door. See Fig. 25 .
BM1 (White, 10 Pin)Right "B" pillar. See Fig. 25 .
BN1 (White, 2 Pin)Right front floor pan. See Fig. 25 .
BO1 (White, 11 Pin)Left rear of luggage compartment. See Fig. 25 .
BP1 (White, 4 Pin)Left rear of luggage compartment. See Fig. 25 .
BQ1 (White, 10 Pin)Left rear luggage compartment. See Fig. 25 .
BR1 (Gray, 3 Pin)Left rear luggage compartment. See Fig. 25 .
BS1 (White, 8 Pin)Left side of rear seat. See Fig. 27 .
BT1 (White, 20 Pin)Center of rear seat. See Fig. 27 .
BT2 (White, 10 Pin)Center rear seat. See Fig. 27 .
BU1 (White, 20 Pin)Center of rear seat. See Fig. 27 .
BV1 (White, 8 Pin)In right rear seat back. See Fig. 27 .
EA1 (Black, 8 Pin)Under left headlight. See Fig. 3 .
EB1 (White, 14 Pin)Inside ECU box. See Fig. 3 .
EB2 (White, 10 Pin)Inside ECU box. See Fig. 3 .
EC1 (White, 3 Pin)Behind intake manifold. See Fig. 3 .
EC2 (Black, 6 Pin)Center rear of engine compartment. See Fig. 3 .
ED1 (Black, 6 Pin)Right front of engine compartment. See Fig. 3 .
IA1 (White, 17 Pin)At left kick panel. See Fig. 20 .
IB1 (Yellow, 2 Pin)At left side of dash. See Fig. 20 .
IB5 (White, 18 Pin)Left end of dash. See Fig. 20 .
IB6 (White, 18 Pin)Left end of dash. See Fig. 20 .
IB7 (White, 25 Pin)Left end of dash. See Fig. 20 .
IC4 (Gray, 22 Pin)Left end of dash. See Fig. 20 .
IC5 (White, 17 Pin)Left end of dash. See Fig. 20 .
ID2 (White, 20 Pin)Left end of dash. See Fig. 20 .
IE1 (White, 2 Pin)At left kick panel. See Fig. 20 .
IF3(Wht 14P )

GROUNDS LOCATION
Under center console. See Fig. 22 .
IF4 (White, 25 Pin)Under center console. See Fig. 22 .
IF5 (White, 22 Pin)Under center console. See Fig. 22 .
IG3 (White, 18 Pin)Right side of dash. See Fig. 22 .
IG4 (White, 25 Pin)Right side of dash. See Fig. 22 .
IH1 (Yellow, 2 Pin)At right side of dash. See Fig. 22 .
IH4 (White, 22 Pin)Right side of dash. See Fig. 22 .
II1 (White, 22 Pin)At right side of dash. See Fig. 22 .
II2 (White, 9 Pin)At right side of dash. See Fig. 22 .
IJ1 (White, 17 Pin)At right kick panel. See Fig. 22 .
IK1 (White, 4 Pin)Center of dash. See Fig. 22 .
ComponentLocation
BLAt left rear floor partition panel. See Fig. 24 .
BMAt left rear quarterpanel. See Fig. 24 .
BNAt right rear floor partition panel. See Fig. 24 .
BOAt right rear quarterpanel. See Fig. 24 .
BPAt left rear seat back. See Fig. 27 .
BQAt right rear seat back. See Fig. 27 .
EAAt right radiator side support. See Fig. 3 .
EBUnder fusible link block. See Fig. 3 .
ECAt left radiator side support. See Fig. 3 .
EDAt top left of dash. See Fig. 3 .
EEOn right cylinder head. See Fig. 3 .
EFOn left cylinder head. See Fig. 3 .
IGAt left side of dash. See Fig. 21 .
IHAt right side of shift lever. See Fig. 21 .
IIAt right side of shift lever. See Fig. 21 .
IJAt right dash brace. See Fig. 21 .
IKAt right side of dash. See Fig. 21 .
IRUnder right front seat. See Fig. 21 .

Fig. 1: Engine Compartment
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.