tow LEXUS LS430 2003 Factory Owner's Manual

TOYOTA
TOYOTA - IMPORTED CARS & TRUCKS
Diagnostic Test TerminalIn Fuse Block
1993-95Under Left Side Of Dash, In Fuse Block
ApplicationConnector Location
Camry
1983-90Next To Brake Master Cylinder
1991Near Left Front Shock Tower
1992-95
4-CylinderNear Wiper Motor
V6Under Left Side Of Dash
Celica
1983-84Next To Battery
1985-95Behind Left Front Shock Tower
Celica SupraRear Of Battery, Near Relay Panel (2-Pin
Connector)
Corolla
Front Wheel Drive
1987Side Of Left Front Shock Tower (2-Pin
Connector)
1988-94Behind Left Front Shock Tower
Rear Wheel Drive
1985-86Side Of Right Front Shock Tower (2-Pin
Connector)
1987Right Rear Corner Of Engine Compartment
Cressida
1988-93
Check ConnectorOn Left Front Shock Tower
Total Diagnostic Communication Link ConnectorUnder Left Side Of Dash
Land Cruiser (1988-94)Near Wiper Motor
MR2
1986-90Near Airflow Meter
1992-95On Right Rear Of Engine Compartment, Near
MAP Sensor
Paseo (1992-95)On Side Of Engine Compartment Fuse/Relay
Block No. 2, Near Battery

Pickup
1984-86Near Ignition Coil, Near Master Cylinder (2-
Pin Connector)
1987-90Right Front Inner Fender Panel, Near Relay
Block
1992-94On Side Of Engine Compartment Fuse/Relay
Block No. 2, Near Battery
Previa
1992-93Under Front Of Driver's Seat
1994
Except SuperchargedUnder Center Console, Near Parking Brake
Lever
SuperchargedUnder Cover, On Top Center Of
Instrument Panel
1995-97On Top Center Of Instrument Panel
RAV4Under Dash, Near Center Console
Starlet
1981-82On Instrument Panel Fuse Block, On Top Of
Dash
1983-84Right Rear Of Engine Compartment
Supra
1986-90Rear Of Battery, Near Relay Panel
1991-92On Left Front Shock Tower
1993-94
DLC No. 1On Right Side Of Firewall
DLC No. 2Under Left Side Of Dash, Near Kick Panel
Tacoma & T100
1993On Side Of Engine Compartment Fuse/Relay
Block No. 2, Near Battery
1994-95
Except OBD-II DLCOn Side Of Engine Compartment
Fuse/Relay Block No. 2, Near Battery
OBD-II DLCUnder Left Side Of Dash
Tercel
1987-90In Engine Compartment, Next To Master
Cylinder
1991-94On Side Of Engine Compartment Fuse/Relay
Block No. 2, Near Battery
1995-98Near Steering Column
VanNear Airflow Meter
4Runner
1985-86Near Ignition Coil, Next To Master Cylinder
(2-Pin Connector)

VOLVO
VOLVO - IMPORTED CARS & TRUCKS
Passat
1992-94Under Center Console, Forward Of Shift
Lever
1995-97On Center Dash, Behind Panel Near
Ashtray
ApplicationConnector Location
C30Under Left Center Of Dash
C70Behind Cover, Below Parking Brake Lever
S40Under Left Center Of Dash
S70Behind Cover, Below Parking Brake Lever
S90Behind Cover, Below Parking Brake Lever
V40Under Left Center Of Dash
V70 (1997-00)Behind Cover Below Parking Brake Lever
V90Behind Cover, Below Parking Brake Lever
240
1986-92Left Rear Corner Of Engine Compartment
1993Behind Left Front Strut Tower
740 & 760
1986-92
Ignition SystemOn Left Front Fender Apron
Fuel Injection (1990-92 Only)Left Rear Corner Of Engine Compartment
780On Left Front Fender, Behind Air Cleaner
Housing
850
1993On Center Console, Forward Of Shift Lever &
Near ECM
1994-95
Non-TurboOn Right Front Strut Tower
TurboBehind Cover, Forward Of Shift Lever
1996-97Behind Cover, Forward Of Shift Lever
940
1991-93
Ignition SystemOn Left Front Fender Apron
Fuel InjectionLeft Rear Corner Of Engine Compartment

1994-95Behind Left Front Strut Tower
960
1992-95On Left Front Strut Tower
1996In Center Console, To Right Of Parking Brake
Lever
1997Behind Cover, Forward Of Shift Lever

Fig. 66: Signal Waveform Graph
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
OK: REPLACE LASER SENSOR (SEE REPLACEMENT
)
CIRCUIT DESCRIPTION
The laser sensor emits laser beams towards an object in front and measures the distance and direction of the
object by receiving the beam reflections. Based on the reflections, the sensor calculates the difference in speed
between your own vehicle and on object in front. This data is transmitted to the cruise control ECU (distance
control ECU).
DTC P1570 PROBLEM SYMPTOM DIAGNOSTIC
HINT:
DTC No.Detection ItemTrouble Area
P1570The ECM outputs this trouble code when it detects the communication
error signal (from the cruise control ECU (distance control ECU) to the
laser sensor) for 0.15 sec. or more while the dynamic laser cruise control
is in operation.laser sensor

CIRCUIT DESCRIPTION
This circuit provides power to operate the laser sensor.
The laser sensor emits laser beams towards an object in front and measures the distance and direction of the
object by receiving the beam reflections. Based on the reflections, the sensor calculates the difference in speed
between your own vehicle and an object in front. This data is transmitted to the cruise control ECU (distance
control ECU).
HINT:
The laser sensor monitors the laser emission and reception by itself. This DTC is detected when it cannot
monitor.
When rain drops or snowflakes strike the laser sensor face, the distance between the vehicle in front and your
own vehicle cannot be measured correctly.
The dynamic laser cruise control system functions by detecting the reflector of the vehicle directly in front. In
the following cases, the system may not be able to detect the vehicle in front and may not properly maintain the
correct vehicle-to-vehicle distance.
The vehicle in front is a tall trailer.
The back of the vehicle in front is extremely dirty.
Emissions from the vehicle in front or from other lanes are heavy.
The vehicle in front has no reflector.
The laser sensor is receiving a strong flash of light (sunlight, etc.).
WIRING DIAGRAM

CIRCUIT DESCRIPTION
This circuit provides power to operate the millimeter wave radar sensor.
The millimeter wave radar sensor emits radar beams towards an object in front and measures the distance and
direction of the object by receiving the beam reflections. Based on the reflections, the sensor calculates the
difference in speed between your own vehicle and an object in front. This data is transmitted to the cruise
control ECU (distance control ECU).
HINT:
The millimeter wave radar sensor monitors the radar emission and reception by itself. This DTC is detected
when it cannot monitor.
When rain drops or snowflakes strike the radar sensor face, the distance between the vehicle in front and your
own vehicle cannot be measured correctly.
The dynamic radar cruise control system functions by detecting the reflector of the vehicle directly in front.
In the following cases, the system may not be able to detect the vehicle in front and may not properly maintain
the correct vehicle-to-vehicle distance.
The vehicle in front is a tall trailer.
Emissions from the vehicle in front or from other lanes are heavy.
WIRING DIAGRAM

Fig. 5: Removing Front Bumper Cover
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
6.REMOVE HEADLAMP CLEANER (FROM MOTOR TO JOINT) HOSE (W/ HEADLAMP
CLEANER)
a. Disconnect the cleaner hose joint from the actuator.
HINT:
Be careful when removing the cleaner hose from the actuator, because washer fluid will spill.
b. Disconnect the cleaner hose from the bumper cover.
7.REMOVE FRONT BUMPER ENERGY ABSORBER
8.REMOVE RADIATOR SUPPORT REINFORCEMENT LOWER
a. Remove the 2 bolts.
b. Unlock the 2 claws and partially remove the reinforcement lower by angling it towards yourself.
HINT:
It is not necessar
y to fully remove the reinforcement lower completely. Partially remove it so that the

Fig. 95: Removing Radiator Support Sub-Assy Upper
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
12.REMOVE COOLER CONDENSER ASSY
a. Push down the 2 condenser brackets.
b. Push the radiator toward the engine.
c. Push the condenser toward the radiator and then pull it upward as shown in Fig. 96
.