2003 LEXUS LS430 Factory Repair Manual

Page 177 of 4500

LEXUS LS430 2003  Factory Repair Manual B: REPAIR CAN COMMUNICATION SYSTEM (SEE PRECAUTION )  
A: Go to next step  
4.INSPECT TRACTION CONTROL SWITCH 
a. Remove the TRAC control switch.  
b. Disconnect the TRAC control switch connector.  
c

Page 178 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 128: Identifying TRAC Control Switch Terminals 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
OK: Go to next step  
5.CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - TRAC OFF SWITCH) 
a. Disconne

Page 179 of 4500

LEXUS LS430 2003  Factory Repair Manual NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
S42-43 (CSW) - T7-8Below 1 ohms
S42-43 (CSW) - Body ground1 Mohms or higher
T7-6 - Body groundBelow 1 ohms

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LEXUS LS430 2003  Factory Repair Manual

Page 181 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 129: Identifying Skid Control ECU Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
OK: Go to next step  
6.INSPECT COMBINATION METER ASSEMBLY (SEE PROBLEM SYMPTOMS TABLE
 ) 
NG: REPAIR OR

Page 182 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 130: Slip Indicator Light Wiring Diagram 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
INSPECTION PROCEDURE 
1.PERFORM ACTIVE TEST BY HAND-HELD TESTER (SLIP INDICATOR LIGHT)

Page 183 of 4500

LEXUS LS430 2003  Factory Repair Manual a. Connect the hand-held tester to the DLC3.  
b. Start the engine.  
c. Select the item "SLIP INDI LIGHT" in the ACTIVE TEST and operate the SLIP indicator light on 
the hand-held tester. 
VE

Page 184 of 4500

LEXUS LS430 2003  Factory Repair Manual B: REPAIR CAN COMMUNICATION SYSTEM (SEE PRECAUTION )  
A: Go to next step  
4.INSPECT COMBINATION METER ASSEMBLY (SLIP INDICATOR LIGHT) (SEE PROBLEM 
SYMPTOMS TABLE ) 
NG: REPAIR OR REPLACE COMBINATIO