2003 LEXUS LS430 cruise control

PRECAUTION
REPLACEMENT
1.SEPARATE BATTERY NEGATIVE TERMINAL
2.REMOVE INSTRUMENT PANEL UNDER COVER SUB-ASSY NO. 2 (See step 21 in
REPLACEMENT
)
3.REMOVE INSTRUMENT PANEL GARNISH SUB-ASSY (See step 22 in REPLACEMENT
)
4.REMOVE GLOVE COMPARTMENT PLATE (See step 23 in REPLACEMENT
)
5.REMOVE CHOKE KNOB HOLE COVER (See REPLACEMENT
)
6.REMOVE INSTRUMENT PANEL FINISH PANEL (See step 26 in REPLACEMENT
)
7.REMOVE CRUISE CONTROL ECU ASSY
a. Disconnect the connector.
b. Remove the nut and cruise control ECU (distance control ECU) assy.

Fig. 1: Removing Cruise Control ECU Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
8.INSTALL CRUISE CONTROL ECU ASSY
a. Install the cruise control ECU (distance control ECU) assy with the nut.
Torque: 5.5 N.m (56 kgf.cm, 49 in.lbf)
9.INITIALIZE DISTANCE CONTROL ECU
a. Be sure to perform the following procedures after replacing the distance control ECU.
1. Turn the ignition switch to the ON position.
2. Push the cruise main switch ON-OFF button on.

3. With the brake pedal depressed, push the cruise control main switch to RES/ACC 3 times within 3
seconds. Check that the VSC buzzer sounds at this time.
REPLACEMENT
1.SEPARATE BATTERY NEGATIVE TERMINAL
2.REMOVE ENGINE UNDER COVER NO. 1 (See REPLACEMENT
)
3.REMOVE FRONT WHEEL OPENING EXTENSION PAD LH (See REPLACEMENT
)
4.REMOVE FRONT FENDER LINER LH (See REPLACEMENT
)
5.REMOVE FRONT WHEEL OPENING EXTENSION PAD RH (See REPLACEMENT
)
6.REMOVE FRONT FENDER LINER RH (See REPLACEMENT
)
7.REMOVE FRONT BUMPER COVER (See step 5 in REPLACEMENT
)
8.REMOVE FRONT BUMPER REINFORCEMENT SUB-ASSY (See step 9 in REPLACEMENT
)
9.REMOVE LASER SENSOR
a. Disconnect the connector and remove the laser sensor.

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. 41: Result Description Chart
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
REPLACEMENT
1.SEPARATE BATTERY NEGATIVE TERMINAL
2.REMOVE SWITCH & VOLUME CASE
3.REMOVE STEERING WHEEL COVER LOWER NO. 2
4.REMOVE HORN BUTTON ASSY (See step 5 in REPLACEMENT
)
5.REMOVE STEERING WHEEL ASSY (See step 7 in OVERHAUL
)
6.REMOVE CRUISE CONTROL MAIN SWITCH ASSY
a. Remove the 2 screws and steering wheel damper.
Fig. 42: Removing Steering Wheel Damper

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
b. Disconnect the connectors.
c. Remove screw (A) and disengage the claw.

Fig. 43: Removing Screw (A) And Disengaging Claw
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
d. Remove 2 screws (B) and the steering wheel LWR cover.
e. Remove the 2 screws and cruise control main switch ass
y.

Fig. 44: Removing Cruise Control Main Switch Assy
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
7.INSPECT STEERING WHEEL CENTER POINT
8.INSTALL STEERING WHEEL ASSY (See step 96 in OVERHAUL
)
9.INSTALL HORN BUTTON ASSY (See step 6 in REPLACEMENT
)
10.CONNECT BATTERY NEGATIVE TERMINAL
11.INSPECT HORN BUTTON ASSY
12.INSPECT SRS WARNING LIGHT