2003 LEXUS LS430 Factory Repair Manual

Page 1529 of 4500

LEXUS LS430 2003  Factory Repair Manual WIRING DIAGRAM 
Fig. 20: Front Left Side Sensor Wiring Diagram
 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
INSPECTION PROCEDURE 
1.INSPECT ULTRASONIC SENSOR NO.1 
a. Remove ultrasonic sensor No.1.

Page 1530 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 21: Identifying Ultrasonic Sensor Number-1 Terminals 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
OK: Go To Next Step.  
2.CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSY - 
ULTRASONIC

Page 1531 of 4500

LEXUS LS430 2003  Factory Repair Manual C17-21 (FLS) - Body groundAlways10 kohms or higher
C17-8 (FGND) - Body groundAlways10 kohms or higher

Page 1532 of 4500

LEXUS LS430 2003  Factory Repair Manual

Page 1533 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 22: Identifying Clearance Warning ECU Assy Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR  
OK: REPLACE CLEARANCE WARNING ECU ASSY (SEE REPLACE

Page 1534 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 24: Front Left Sensor Wiring Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
INSPECTION PROCEDURE 
1.INSPECT ULTRASONIC SENSOR NO.1 
a. Remove ultrasonic sensor No.1.  
b. Measure the resis

Page 1535 of 4500

LEXUS LS430 2003  Factory Repair Manual NG: REPLACE ULTRASONIC SENSOR NO.1 (SEE REPLACEMENT )  
OK: Go To Next Step.  
2.CHECK HARNESS AND CONNECTOR (CLEARANCE WARNING ECU ASSY - 
ULTRASONIC SENSOR NO. 1) 
a. Disconnect the C17 connector fr

Page 1536 of 4500

LEXUS LS430 2003  Factory Repair Manual