2003 LEXUS LS430 Factory Repair Manual

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Page 401 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 147: Identifying Location Of Fuse (A/C) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. OK: Go to next step 3.INSPECT AIR CONDITIONING AMPLIFIER (B - BODY GROUND) a. Remove the A/C amplifier as

Page 402 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 148: Inspecting Air Conditioning Amplifier (B - Body Ground) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE CIRCUIT DESCR

Page 403 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 149: 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 not

Page 404 of 4500

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

Page 405 of 4500

LEXUS LS430 2003 Factory Repair Manual <0029004c004a00110003001400180013001d0003002c005100560053004800460057004c0051004a00030024004c005500030026005200510047004c0057004c00520051004c0051004a0003002400500053004f004c0049004c004800550003000b002

Page 406 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 151: Checking Harness And Connector (Air Conditioning Amplifier - Battery) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. OK: Go to next step 4.CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMP

Page 407 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 152: Checking Harness And Connector (Air Conditioning Amplifier - Body Ground) Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. OK: REPLACE AIR CONDITIONING AMPLIFIER (SEE REPLACEMENT ) CIRCUIT

Page 408 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 153: ACC Power Source Circuit Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE 1.INSPECT AIR CONDITIONING AMPLIFIER (ACC - BODY GROUND) a. Remove the A/C amplifier assy with
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