2003 LEXUS LS430 Factory Repair Manual

Page 2569 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 42: Data List Chart - CC (ECM) (2 Of 2) 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
MULTI-INFORMATION DISPLAY CONTROL SWITCH (STEERING PAD SWITCH 
MODULATOR):  
DATA LIST (MULTI-INFORMATION DI

Page 2570 of 4500

LEXUS LS430 2003  Factory Repair Manual a. Connect the hand-held tester to the DLC3.  
b. Turn the ignition switch to the ON position.  
c. According to the display on the tester, perform the "ACTIVE TEST".  
HINT: 
The ignition swi

Page 2571 of 4500

LEXUS LS430 2003  Factory Repair Manual DTC U1102LOST COMMUNICATION WITH RADAR SENSOR
DTC P1572IMPROPER AIMING OF RADAR SENSOR BEAM AXIS
DTC U0126LOST COMMUNICATION WITH STEERING ANGLE SENSOR 
MODULE
DTC U0123LOST COMMUNICATION WITH YAW RAT

Page 2572 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 43: Diagnostic Trouble Code Chart 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Page 2573 of 4500

LEXUS LS430 2003  Factory Repair Manual CIRCUIT DESCRIPTION 
SEE CIRCUIT DESCRIPTION
 . 
Fig. 44: DTC P0500 And P0503 Problem Symptom Diagnostic Chart
 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
WIRING DIAGRAM 
SEE WIRING DIAGRAM
 . 
IN

Page 2574 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 45: DTC P0571 Problem Symptom Diagnostic Chart 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
WIRING DIAGRAM

Page 2575 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 46: Wiring Diagram - Stop Light Switch Circuit Malfunction 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
INSPECTION PROCEDURE 
1.READ VALUE ON HAND-HELD TESTER 
a. Connect the han
d-held tester

Page 2576 of 4500

LEXUS LS430 2003  Factory Repair Manual b. Turn the ignition switch to the ON position, and turn the hand-held tester main switch on.  
c. Select the item "STP LIGHT SW M", "STP LIGHT SW S1" or "STP LIGHT SW S2" in t