2003 LEXUS LS430 Factory Repair Manual

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Page 2601 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 74: Wiring Diagram - Distance Control ECU Power Source Circuit Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE 1.INSPECT CRUISE CONTROL ECU ASSY (DISTANCE CONTROL ECU) a. Di

Page 2602 of 4500

LEXUS LS430 2003 Factory Repair Manual c. Measure the resistance according to the value(s) in the table below. Standard: CRUISE CONTROL ECU TERMINALS RESISTANCE SPECIFICATION NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR Fig. 75: D

Page 2603 of 4500

LEXUS LS430 2003 Factory Repair Manual CIRCUIT DESCRIPTION This circuit provides power to operate the millimeter wave radar sensor. The millimeter wave radar sensor emits radar beams towards an object in front and measures the distance a

Page 2604 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 76: Wiring Diagram - Sensor Power Source Circuit Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE 1.INSPECT MILLIMETER WAVE RADAR SENSOR ASSY a. Disconnect the millimeter wav

Page 2605 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 77: Disconnecting Millimeter Wave Radar Sensor Connector Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. OK: Go To Next Step. 2.CHECK WIRE HARNESS AND CONNECTOR a. Disconnect the ECM E3 connect

Page 2606 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 78: Disconnecting Millimeter Wave Radar Sensor Connector Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. M7-1 (LGND) - Body groundAlways10 kohms or higher M7-2(SGND) - Body groundAlwaysBelow 1 ohms

Page 2607 of 4500

LEXUS LS430 2003 Factory Repair Manual

Page 2608 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 79: Disconnecting ECM E3 Connector Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. NG: REPAIR OR REPLACE WIRE HARNESS OR CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
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