2003 LEXUS LS430 Factory Repair Manual

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LEXUS LS430 2003  Factory Repair Manual Fig. 25: Buzzer Problem Symptoms Table 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
HINT: 
Refer to ON
-VEHICLE INSPECTION . 
COMBINATION METER ASSY

Page 1762 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 26: Identifying Terminals Of ECU (Combination Meter Assy) 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
COMBINATION METER ASSY CONNECTOR TERMINALS REFERENCE 
Symbols 
(Terminals No.)Wiring 
Colo

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LEXUS LS430 2003  Factory Repair Manual Body groundBody groundOFFto 5.5 V
RESET (C12-8) - 
Body groundY-G - Body 
groundTRIP RESET signal
Ignition switch ON, TRIP 
RESET switch ON --> 
OFFBelow 1 V --> 4.5 
to 5.5 V
BELT (C12-9) - 
Body gro

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LEXUS LS430 2003  Factory Repair Manual Fig. 27: Identifying Waveform 1 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
Waveform 1 (Reference): 
WAVEFORM 1 (REFERENCE) 
ItemContents
Tool setting5V/DIV, 10 ms/DIV
Vehicle conditionEngine idle

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LEXUS LS430 2003  Factory Repair Manual Fig. 28: Identifying Waveform 2 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
Waveform 2 (Reference):  
WAVEFORM 2 (REFERENCE) 
HINT: 
As vehicle speed increases, the cycle of the signal waveform nar

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LEXUS LS430 2003  Factory Repair Manual Fig. 29: Combination Meter Inner Circuit Diagram 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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LEXUS LS430 2003  Factory Repair Manual Fig. 30: Combination Meter Connector Terminals Reference Chart 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
1.CHECK DLC3 
a. The vehicle's combination meter (ECU) uses CAN and the ISO 9141-2 for

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LEXUS LS430 2003  Factory Repair Manual Fig. 31: Identifying DLC3 Connector Terminals 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
DLC3 CONNECTOR TERMINALS REFERENCE 
HINT: 
If the display shows UNABLE TO CONNECT TO VEHICLE when you have