2003 LEXUS LS430 Factory Repair Manual

Page 121 of 4500

LEXUS LS430 2003  Factory Repair Manual OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS 
TABLE  
4.INSPECT SPEED SENSOR TIP 
a. Remove the front and rear speed sensor.  
b. Check the sensor tip.  
OK: Go to next step  
No s

Page 122 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 87: Identifying Speed Sensor Rotor Location 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
CIRCUIT DESCRIPTION 
Fig. 88: DTC C1241/41 Detecting Condition And Trouble Area
 
Courtesy of TOYOTA MOT

Page 123 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 89: Low Battery Wiring Diagram 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
INSPECTION PROCEDURE 
1.INSPECT FUSE (ABS-IG FUSE) 
a. Remove the ABS-IG Fuse from the driver side J/B.  
b. Measure

Page 124 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 90: Identifying ABS-IG Fuse Location 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: INSPECT FOR SHORT CIRCUIT IN ALL HARNESS AND COMPONENTS CONNECTED 
TO ECU-IG FUSE

Page 125 of 4500

LEXUS LS430 2003  Factory Repair Manual OK: Go to next step  
2.INSPECT BATTERY 
a. Check the battery voltage.  
Standard:  
Voltage: 10 to 14 V  
NG: INSPECT CHARGING SYSTEM (SEE ON
-VEHICLE INSPECTION )  
OK: Go to next step  
3.INSPECT S

Page 126 of 4500

LEXUS LS430 2003  Factory Repair Manual TESTER CONNECTION SPECIFIED CONDITION
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (GND TERMINAL - BODY 
GROUND)  
Fig. 92: Identifying Skid Control ECU Connector Terminals
 
Courtesy of TOYOTA MOTOR SA

Page 127 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 93: Master Cylinder Pressure Sensor Circuit Description 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
Fig. 94: DTC C1246/46 Detecting Condition And Trouble Area
 
Courtesy of TOYOTA MOTOR SALES,

Page 128 of 4500

LEXUS LS430 2003  Factory Repair Manual c. Select the DATA LIST mode on the hand-held tester. 
MEASUREMENT ITEM / RANGE (DISPLAY) DESCRIPTION 
d. Check that the brake fluid pressure value of the master cylinder pressure sensor observed in t