2003 LEXUS LS430 Factory Repair Manual

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LEXUS LS430 2003 Factory Repair Manual WIRELESS DOOR LOCK CONTROL SYSTEM DIAGNOSTIC TROUBLE CODE (DTC)
IDENTIFICATION
DTCDescription
DTC B1242With Smart-Key: WIRELESS DOOR LOCK TUNER CIRCUIT
MALFUNCTION
Without Smart-Key: WIRELESS DOOR

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LEXUS LS430 2003 Factory Repair Manual PRECAUTION
SYSTEM NAME AND PAGE REFERENCE
Keep in mind the following points when inspecting the dynamic laser cruise control system.
As there is a limitation to the vehicle-to-vehicle distance cont

PRECAUTION
SYSTEM NAME AND PAGE REFERENCE
Keep in mind the following points when inspecting the dynamic laser cruise control system.
As there is a limitation to the vehicle-to-vehicle distance controlling capability, do not overly rely on the
dynamic laser cruise control system.
Do not neglect to pay constant attention to the vehicle-to-vehicle distance and the traffic conditions when
using the dynamic laser cruise control system. Decelerate with the brake pedal, or accelerate with the
accelerator pedal, according to the situation, to keep an appropriate distance with the vehicle in front.
When the vehicle in front decelerates rapidly or another vehicle pulls out in front of the vehicle,
decelerating in time to avoid a collision may not be possible without additional braking.
The dynamic laser cruise control system is designed to assist in maintaining an appropriate distance with
the vehicle in front. However, the system alone is not sufficient. It is imperative that the driver pays
attention at all times.
The laser sensor has functions to automatically detect dirt on the sensor face and inform the driver, but it
is not perfect. Keep the sensor face clean.
The dynamic laser cruise control system does not work, or give vehicle-approaching warning, for vehicles
which are stopped or driving at significantly slower speeds. Always pay attention to those other vehicles.
The laser sensor detection area is narrow at close range, so detection of a vehicle pulling out just in front
may be delayed, or a motorcycle running on the side of the same lane may not be detected. The distance
to the vehicle in front may not be maintained properly due to these reasons.
Even if ACCEL is operated to increase the set vehicle speed, the vehicle does not accelerate because the
speed is controlled in accordance with the speed of the vehicle in front while driving with the vehicle-to-
vehicle distance control mode on (follow-up cruising). However, as the set vehicle speed has been
increased by ACCEL operation, the vehicle keeps accelerating when there is no vehicle in front. Check
the set speed with the set vehicle speed indication on the display.
The controlled vehicle distance may be shorter than the set vehicle distance when cruising on a long
downhill road.
Push the cruise control main switch ON-OFF button off and reset the cruise control if the master warning
light comes on, the CRUISE main indicator light blinks, and the fail indication is shown on the display
with a "pong" sound during dynamic laser cruise control operation.
System NameSee Procedure
Front Power Seat Control SystemINITIALIZATION

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LEXUS LS430 2003 Factory Repair Manual The vehicle-approaching warning buzzer does not sound in the constant speed control mode because the
existence of the vehicle in front and the distance to it are not judged as in the vehicle-to-vehic

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LEXUS LS430 2003 Factory Repair Manual Fig. 1: Identifying Dynamic Laser Cruise Control System Electrical Location (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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LEXUS LS430 2003 Factory Repair Manual Fig. 2: Identifying Dynamic Laser Cruise Control System Electrical Location (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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LEXUS LS430 2003 Factory Repair Manual Fig. 3: Wiring Diagram - Dynamic Laser Cruise Control System
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Input and output signals of each ECU.

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LEXUS LS430 2003 Factory Repair Manual Fig. 4: ECU Input And Output Signals Chart (1 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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LEXUS LS430 2003 Factory Repair Manual Fig. 5: ECU Input And Output Signals Chart (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
1.GENERAL
a. The dynamic laser cruise control system has two cruise control modes: the constant spee

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