2003 LEXUS LS430 Factory Repair Manual

Page 793 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 75: Identifying Stereo Component Amplifier Assy 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: Go to step 2  
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS 
TABLE  
2.CHECK

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LEXUS LS430 2003  Factory Repair Manual Fig. 76: Identifying Radio Receiver Assy Connector 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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LEXUS LS430 2003  Factory Repair Manual Fig. 77: Identifying Stereo Components Amplifier Connector 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR  
OK: REPLACE RADIO RECEIVER ASSY (SEE REPLACEMENT

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LEXUS LS430 2003  Factory Repair Manual Fig. 78: Identifying Stereo Connector Amplifier Connector 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
CIRCUIT DESCRIPTION 
This circuit sends the signal to the stereo component amplifier to mute th

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LEXUS LS430 2003  Factory Repair Manual WIRING DIAGRAM 
Fig. 79: Identifying Radio Receiver Assy 
- Stereo Component Tuner Wiring Diagram 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
INSPECTION PROCEDURE 
1.INSPECT STEREO COMPONENT TUNER

Page 798 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 80: Inspecting Stereo Component Tuner 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS 
TABLE  
2.CHECK HARNESS AND CONNECTOR (RADIO

Page 799 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 81: Identifying Radio Receiver Assy Connector 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Page 800 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 82: Identifying Stereo Receiver Assy Connector 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPAIR OR REPLACE HARNESS OR CONNECTOR  
OK: REPLACE RADIO RECEIVER ASSY (SEE REPLACEMENT
 )  
IN