2003 LEXUS LS430 Factory Repair Manual

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Page 425 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 168: Rear IG Power Source Circuit Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE HINT: Start the engine before inspection. Check the IG1 relay or battery if the engine does

Page 426 of 4500

LEXUS LS430 2003 Factory Repair Manual FUSE (RR A/C) RESISTANCE NG: CHECK FOR SHORT IN ALL HARNESS AND COMPONENTS CONNECTED TO FAILURE FUSE (RR A/C FUSE) OK: Go to next step 2.INSPECT REAR AIR CONDITIONING AMPLIFIER (IG - GND) a. Re

Page 427 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 169: Inspecting Rear Air Conditioning Amplifier (IG - GND) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 3.CHECK HARNESS AND CONNECTOR (REAR AIR CONDITIONING AMPLIFIER - BATTERY) (SEE ELECTRONIC

Page 428 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 170: Checking Harness And Connector (Rear Air Conditioning Amplifier -Battery) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. OK: Go to next step 4.CHECK HARNESS AND CONNECTOR (REAR AIR CONDITI

Page 429 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 171: Checking Harness And Connector (Rear Air Conditioning Amplifier - Body Ground) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. OK: REPLACE REAR AIR CONDITIONING AMPLIFIER (SEE OVERHAUL ) C

Page 430 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 172: Rear Blower Motor Circuit Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE 1.INSPECT LUGGAGE ROOM J/B ECU (RHR, RFR - BODY GROUND) a. Remove the luggage room J/B with co

Page 431 of 4500

LEXUS LS430 2003 Factory Repair Manual NG: Go to STEP 2 Fig. 173: Inspecting Luggage Room J/B ECU (RHR, RFR - Body Ground) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. OK: Go to STEP 4 2.INSPECT AIR CONDITIONING AMPLIFIER (RHR, RFR1

Page 432 of 4500

LEXUS LS430 2003 Factory Repair Manual NG: Go to STEP 4 Fig. 174: Inspecting Air Conditioning Amplifier (RHR, RFR1) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. OK: Go to next step 3.CHECK HARNESS AND CONNECTOR (LUGGAGE ROOM J/B - R
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