2003 LEXUS LS430 Factory Repair Manual

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Page 2217 of 4500

LEXUS LS430 2003 Factory Repair Manual NG: REPLACE RELAY OK: Go to Next Step. 3.CHECK WIRE HARNESS (PASSENGER DOOR ECU - BATTERY AND BODY GROUND) a. Disconnect the F17 ECU connector. b. Measure the voltage and resistance of the wire

Page 2218 of 4500

LEXUS LS430 2003 Factory Repair Manual NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE CIRCUIT DESCRIPTION This circuit supplies power to operate the rear door LH ECU.

Page 2219 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 48: Rear Door LH ECU Power Source Circuit - Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE 1.INSPECT FUSE (MPX-IG, AM1, RR DOOR LH, MPX-B1, D/C CUT) a. Remov

Page 2220 of 4500

LEXUS LS430 2003 Factory Repair Manual b. Remove the RR DOOR LH and MPX-B1 fuses from the passenger side J/B. c. Remove the D/C CUT fuse from the FL block assy. d. Measure the resistance. Standard: Below 1 ohms NG: REPLACE FUSE OK

Page 2221 of 4500

LEXUS LS430 2003 Factory Repair Manual OK: Go to Next Step. 3.CHECK WIRE HARNESS (REAR DOOR LH ECU - BATTERY AND BODY GROUND) a. Disconnect the R13 ECU connector. b. Measure the voltage and resistance of the wire harness side connecto

Page 2222 of 4500

LEXUS LS430 2003 Factory Repair Manual CIRCUIT DESCRIPTION This circuit supplies power to operate the rear door RH ECU. WIRING DIAGRAM

Page 2223 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 51: Rear Door RH ECU Power Source Circuit -Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE 1.INSPECT FUSE (MPX-IG, AM1, RR DOOR RH, MPX-B1, D/C CUT) a. Remove

Page 2224 of 4500

LEXUS LS430 2003 Factory Repair Manual TERMINALS RESISTANCE REFERENCE NG: REPLACE RELAY OK: Go to Next Step. 3.CHECK WIRE HARNESS (REAR DOOR RH ECU - BATTERY AND BODY GROUND): Go to Next Step. a. Disconnect the R14 ECU connector. b
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