2003 LEXUS LS430 Factory Repair Manual

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Page 3929 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 14: Driver Seat ECU - Data List Chart (3 Of 3) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 2.ACTIVE TEST HINT: Using the hand-held tester's ACTIVE TEST allows relay, VSV, actuator, and o

Page 3930 of 4500

LEXUS LS430 2003 Factory Repair Manual time. The DATA LIST can be displayed during the ACTIVE TEST. a. Connect the hand-held tester (with CAN VIM) to the DLC3. b. Turn the ignition switch ON. c. Perform the ACTIVE TEST by following the

Page 3931 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 15: ECU Power Source Circuit (Driver Seat ECU) - Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Page 3932 of 4500

LEXUS LS430 2003 Factory Repair Manual INSPECTION PROCEDURE 1.INSPECT FUSE (D/C CUT, D P/SEAT, MPX-IG, AM1, MPX-B1) a. Remove the D/C CUT fuse from the FL block. b. Remove the D P/SEAT, MPX-IG and AM1 fuses from the driver side J/B.

Page 3933 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 16: Identifying D-IG1 Relay Terminals Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. NG: REPLACE RELAY OK: GO TO NEXT STEP 3.CHECK WIRE HARNESS (DRIVER SEAT ECU - BATTERY AND BODY GROUND) a.

Page 3934 of 4500

LEXUS LS430 2003 Factory Repair Manual Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. Standard: TESTER CONNECTION AND SPECIFIED CONDITION NG: REPAIR OR REPLACE HARNESS AND CONNECTOR OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLE

Page 3935 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 18: Power Source Circuit (Driver Door ECU) - Wiring Diagram Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE 1.INSPECT FUSE (MPX-B1, AM1, MPX-IG, D DOOR) a. Remove the MPX-IG

Page 3936 of 4500

LEXUS LS430 2003 Factory Repair Manual NG: REPLACE FUSE OK: GO TO NEXT STEP 2.INSPECT RELAY (D-IG1) a. Remove the D-IG1 relay from the driver side J/B. b. Measure the resistance of the relay. Standard: TESTER CONNECTION AND SPEC
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