2003 LEXUS LS430 ECO mode

c. Adjust the laser beam axis
1. Turn the ignition switch to the ON position.
2. Push the cruise control main switch ON-OFF button on.
3. Connect the hand-held tester to the DLC3, and turn the power ON.
Fig. 9: Connecting Hand
-Held Tester To DLC3
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
4. Operate by following the screen menu and select "BEAM AXIS ADJUST" of the Laser Cruise
Control, then press the "ENTER" key.
HINT:
Pressing the "ENTER" key will make the ECM transfer to BEAM AXIS ADJUSTMENT
MODE.
When the ECM transfers to BEAM AXIS ADJUSTMENT MODE, the buzzer sounds for 1
second.

Fig. 27: Measuring To Left And Placing Reflector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
f. Adjust the radar beam axis
1. Turn the ignition switch to the ON position.
2. Push the cruise control main switch ON-OFF button on.
3. Connect the hand-held tester to the DLC3, and turn the power ON.
Fig. 28: Connecting Hand
-Held Tester To DLC3
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
4. Operate by following the screen menu and select "BEAM AXIS ADJUST" of the Radar
Cruise Control, then press the "ENTER" key.
HINT:
Pressing the "ENTER" key will make the ECM transfer to BEAM AXIS
ADJUSTMENT MODE.
When the ECM transfers to BEAM AXIS ADJUSTMENT MODE, the buzzer sounds
for 1 second.

Fig. 8: Main Components Function Chart (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
3.LIMIT CONTROL
a. Low speed limit
The lowest possible limit of the speed setting range is set at approximately 45 km/h (28
mph). The cruise control system cannot be set when the driving vehicle speed is below the
low speed limit. Cruise control operation will be automatically canceled and the stored
vehicle speed will be erased when the vehicle speed goes below the low speed limit (45 km/h
(28 mph)) while the cruise control is in operation.
b. High speed limit (Constant speed control mode)
The highest possible limit of the speed setting range is set at approximately 200 km/h (125
mph). The cruise control system cannot be set when the driving vehicle speed is over the
high speed limit. Speed up using RESUME/ACCEL with the cruise control main switch assy
also cannot be set beyond the high speed limit.
c. Upper speed limit (Vehicle-to-vehicle distance control mode)
The set vehicle speed can be increased up to approximately 85 mph in USA and 135 km/h in
Canada.
4.CRUISE CONTROL OPERATION
The cruise control main switch operates eight functions: SET, COAST, TAP-DOWN, RESUME,
ACCEL, TAP-UP, CANCEL, and MODE. The SET, TAP-DOWN and COAST functions, and the
RESUME, TAP-UP and ACCEL functions are operated with the same switch. The cruise control main
switch assy is an automatic return type switch which turns on only while operating it in each arrow
direction and turns off after releasing it.
The dynamic laser cruise control system has two cruise control modes: the constant speed control mode
and vehicle-to-vehicle distance control mode.
The vehicle-to-vehicle distance control mode is always selected when starting up the dynamic laser
cruise control system.
Operation of the constant speed control mode is the same as that for the conventional type cruise
control system.
a. MODE CONTROL
Pushing the switch to MODE for more than 1 second while driving with the cruise control
main switch ON-OFF button on (RADAR READY is on) switches the mode to the constant

speed control mode.
b. SET CONTROL (Constant speed control mode)
Vehicle speed is stored and constant speed control is maintained when pushing the switch to
SET/COAST while driving with the vehicle speed within the set speed range (between the
low and high speed limits) after pushing the cruise control main switch ON-OFF button on
(RADAR READY is on), and entering the constant speed control mode.
c. SET CONTROL (Vehicle-to-vehicle distance control mode)
Vehicle speed is stored and vehicle-to-vehicle control is maintained when pushing the switch
to SET/COAST while driving with the cruise control main switch ON-OFF button on
(RADAR READY is on), and vehicle speed is within the set speed range (between the low
and high speed limits).
d. COAST CONTROL (Constant speed control mode)
The ECM makes the cruise control demanding throttle opening angle zero degrees and
decelerates the vehicle (the throttle valve is not fully closed due to the idle speed control,
etc.) when SET/COAST on the cruise control main switch is pressed and held while the
constant speed control mode is in operation. Vehicle speed, when the cruise control main
switch is released from SET/COAST, is stored and constant speed control is maintained.
e. COAST CONTROL (Vehicle-to-vehicle distance control mode)
When SET/COAST on the cruise control main switch is pressed and held while the vehicle-
to-vehicle distance control mode is in operation, the stored vehicle speed decreases by
approximately 5 km/h (CANADA) or 5 mph (USA) per second.
f. TAP-DOWN CONTROL (Constant speed control mode)
When tapping down on the cruise control main switch to SET/COAST (for approximately
0.5 second) while the constant speed control mode is in operation, the stored vehicle speed
decreases each time by approximately 1.6 km/h (1 mph). However, when the difference
between the driving and the stored vehicle speeds is more than 5 km/h (3 mph), the vehicle
speed, when the cruise control main switch is released from SET/COAST, will be stored and
constant speed control is maintained.
g. TAP-DOWN CONTROL (Vehicle-to-vehicle distance control mode)
When tapping down on the cruise control main switch to SET/COAST (for approximately
0.5 second) while the vehicle-to-vehicle distance control mode is in operation, the stored
vehicle speed decreases each time by approximately 5 km/h (CANADA) or 5 mph (USA).
h. ACCELERATOR CONTROL (Constant speed control mode)
The throttle valve motor of the throttle position sensor and motor is instructed by the ECM to
open the valve when RESUME/ACCEL on the cruise control main switch is pressed and held
while the constant speed control mode is in operation. Vehicle speed, when the cruise control
main switch is released from RESUME/ACCEL, is stored and constant speed control is
maintained.
i. ACCELERATION CONTROL (Vehicle-to-vehicle distance control mode)
When RESUME/ACCEL on the cruise control main switch is pressed and held while the
vehicle-to-vehicle distance control mode is in operation, the s
tored vehicle speed increases
by approximately 5 km/h (CANADA) or 5 mph (USA) per second.
Pushin
g the cruise control main switch to RESUME/ACCEL while following the vehicle in

front with the vehicle-to-vehicle distance control mode does not increase the actual vehicle
speed, but changes only the set vehicle speed.
j. TAP-UP CONTROL (Constant speed control mode)
When tapping up on the cruise control main switch to RESUME/ACCEL (for approximately
0.5 second) while the constant speed control mode is in operation, the stored vehicle speed
increases each time by approximately 1.6 km/h (1 mph). However, when the difference
between the driving and the stored vehicle speeds is more than 5 km/h (3 mph), the stored
vehicle speed will not be changed.
k. TAP-UP CONTROL (Vehicle-to-vehicle distance control mode)
When tapping up on the cruise control main switch to RESUME/ACCEL (for approximately
0.5 second) while the vehicle-to-vehicle distance control mode is in operation, the stored
vehicle speed increases each time by approximately 5 km/h (CANADA) or 5 mph (USA).
l. MANUAL CANCEL CONTROL
<00270052004c0051004a000300440051005c00030052004900030057004b0048000300490052004f004f0052005a004c0051004a000300460044005100460048004f005600030057004b00480003004600550058004c005600480003004600520051005700
550052004f00030056005c00560057004800500003005a004b[ile in operation. (The stored
vehicle speed in the ECM is maintained.)
Depressing the brake pedal
<003000520059004c0051004a00030057004b004800030056004b004c004900570003004f0048005900480055000300570052000300440051005c0003005300520056004c0057004c0052005100030048005b0046004800530057000300270003000b001900
57004b000f000300180057004b000f00030044005100470003[4th gears)
Pushing the cruise control main switch to CANCEL
Pushing the cruise control main switch ON-OFF button off (The stored vehicle speed
in the ECM is not maintained.)
m. RESUME CONTROL
If the cruise control operation was cancelled with the stop lamp switch or the CANCEL
switch, and if driving speed is within the limit range, pushing the cruise control main switch
to RESUME/ACCEL restores vehicle speed memorized at the time of cancellation, and
maintains constant speed control. In constant speed mode, once vehicle speed goes below the
low speed limit, RESUME operation is not possible even if accelerating up to the low speed
limit, or more, again.
5.LASER BEAM AXIS ADJUSTMENT
The dynamic laser cruise control system has an automatic adjustment function of the optical axis. Perform
the adjustment of the laser sensor optical axis with the hand-held tester (see ADJUSTMENT
for the
optical axis adjustment).
6.BRAKE CONTROL
The distance control ECU (cruise control ECU) determines the distance between a vehicle in front and
your own, relative speed, target decreasing speed and deceleration rate to transmit a brake demand signal
to the skid control ECU via ECM.
7.DOWNSHIFT CONTROL
While the cruise control system is in operation, the gear may downshift from overdrive (6th) to 5th on an
uphill road. After the gear is shifted down to 5th, if the system determines that the uphill inclination has
become smaller based on throttle opening, the gear automatically returns to overdrive (6th).

Fig. 15: Identifying Cruise Control Main Switch
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
2.INSPECT MODE SWITCH
a. Turn the ignition switch to the ON position.
HINT:
Dynamic laser cruise system is in the default mode.
b. After pushing the ON-OFF button on, push the cruise control main switch to MODE for at least 1
second without any other control. Make sure that only "NORM." and nothing else is indicated on
the display.

RESUME, TAP-UP and ACCEL functions are operated with the same switch. The cruise control main
switch assy is an automatic return type switch which turns on only while operating it in each arrow
direction and turns off after releasing it.
The dynamic radar cruise control system has two cruise control modes: the constant speed control mode
and vehicle-to-vehicle distance control mode.
The vehicle-to-vehicle distance control mode is always selected when starting up the dynamic radar
cruise control system.
Operation of the constant speed control mode is the same as that for the conventional type cruise
control system.
a. MODE CONTROL
Pushing the switch to MODE for more than 1 second while driving with the cruise control
main switch ON-OFF button on (RADAR READY is on) switches the mode to the constant
speed control mode.
b. SET CONTROL (Constant speed control mode)
Vehicle speed is stored and constant speed control is maintained when pushing the switch to
SET/ COAST while driving with the vehicle speed within the set speed range (between the
low and high speed limits) after pushing the cruise control main switch ON-OFF button on
(RADAR READY is on), and entering the constant speed control mode.
c. SET CONTROL (Vehicle-to-vehicle distance control mode)
Vehicle speed is stored and vehicle-to-vehicle control is maintained when pushing the switch
to SET/ COAST while driving with the cruise control main switch ON-OFF button on
(RADAR READY is on), and vehicle speed is within the set speed range (between the low
and high speed limits).
d. COAST CONTROL (Constant speed control mode)
The ECM makes the cruise control demanding throttle opening angle zero degrees and
decelerates the vehicle (the throttle valve is not fully closed due to the idle speed control,
etc.) when SET/COAST on the cruise control main switch is pressed and held while the
constant speed control mode is in operation. Vehicle speed, when the cruise control main
switch is released from SET/COAST, is stored and constant speed control is maintained.
e. COAST CONTROL (Vehicle-to-vehicle distance control mode)
When SET/COAST on the cruise control main switch is pressed and held while the vehicle-
to-vehicle distance control mode is in operation, the stored vehicle speed decreases by
approximately 5 km/h (CANADA) or 5 mph (USA) per second.
f. TAP-DOWN CONTROL (Constant speed control mode)
When tapping down on the cruise control main switch to SET/COAST (for approximately
0.5 second) while the constant speed control mode is in operation, the stored vehicle speed
decreases each time by approximately 1.6 km/h (1 mph). However, when the difference
between the driving and the stored vehicle speeds is more than 5 km/h (3 mph), the vehicle
speed, when the cruise control main switch is released from SET/COAST, will be stored and
constant speed control is maintained.
g. TAP-DOWN CONTROL (Vehicle-to-vehicle distance control mode)
When tappin
g down on the cruise control main switch to SET/COAST (for approximately

0.5 second) while the vehicle-to-vehicle distance control mode is in operation, the stored
vehicle speed decreases each time by approximately 5 km/h (CANADA) or 5 mph (USA).
h. ACCELERATOR CONTROL (Constant speed control mode)
The throttle valve motor of the throttle position sensor and motor is instructed by the ECM to
open the valve when RESUME/ACCEL on the cruise control main switch is pressed and held
while the constant speed control mode is in operation. Vehicle speed, when the cruise control
main switch is released from RESUME/ACCEL, is stored and constant speed control is
maintained.
i. ACCELERATION CONTROL (Vehicle-to-vehicle distance control mode)
When RESUME/ACCEL on the cruise control main switch is pressed and held while the
vehicle-to-vehicle distance control mode is in operation, the stored vehicle speed increases
by approximately 5 km/h (CANADA) or 5 mph (USA) per second.
Pushing the cruise control main switch to RESUME/ACCEL while following the vehicle in front
with the vehicle-to-vehicle distance control mode does not increase the actual vehicle speed, but
changes only the set vehicle speed.
j. TAP-UP CONTROL (Constant speed control mode)
When tapping up on the cruise control main switch to RESUME/ACCEL (for approximately
0.5 second) while the constant speed control mode is in operation, the stored vehicle speed
increases each time by approximately 1.6 km/h (1 mph). However, when the difference
between the driving and the stored vehicle speeds is more than 5 km/h (3 mph), the stored
vehicle speed will not be changed.
k. TAP-UP CONTROL (Vehicle-to-vehicle distance control mode)
When tapping up on the cruise control main switch to RESUME/ACCEL (for approximately
0.5 second) while the vehicle-to-vehicle distance control mode is in operation, the stored
vehicle speed increases each time by approximately 5 km/h (CANADA) or 5 mph (USA).
l. MANUAL CANCEL CONTROL
<00270052004c0051004a000300440051005c00030052004900030057004b0048000300490052004f004f0052005a004c0051004a000300460044005100460048004f005600030057004b00480003004600550058004c005600480003004600520051005700
550052004f00030056005c00560057004800500003005a004b[ile in operation. (The stored
vehicle speed in the ECM is maintained.)
Depressing the brake pedal
<003000520059004c0051004a00030057004b004800030056004b004c004900570003004f0048005900480055000300570052000300440051005c0003005300520056004c0057004c0052005100030048005b0046004800530057000300270003000b001900
57004b000f000300180057004b000f00030044005100470003[4th gears)
Pushing the cruise control main switch to CANCEL
Pushing the cruise control main switch ON-OFF button off (The stored vehicle speed
in the ECM is not maintained.)
m. RESUME CONTROL
If the cruise control operation was cancelled with the stop lamp switch or the CANCEL
switch, and if driving speed is within the limit range, pushing the cruise control main switch
to RESUME/ACCEL restores vehicle speed memorized at the time of cancellation, and
maintains constant speed control. In constant speed mode, once vehicle speed goes below the
low speed limit, RESUME operation is not possible even if accelerating up to the low speed
limit, or more, again.
5.BRAKE CONTROL