2003 LEXUS LS430 Factory Repair Manual

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LEXUS LS430 2003  Factory Repair Manual B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
C: REPLACE AIR CONDITIONING AMPLIFIER (SEE REPLACEMENT )  
A: Go to next step  
2.INSPECT AIR CONDITIONING AMPLIFIER (TFACEDr - SG

Page 274 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 56: Inspecting Air Conditioning Amplifier (TFACEDR - SG-3) 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
Result:  
AIR CONDITIONING AMPLIFIER (TFACEDR - SG-3) TEST RESULT 
B: PROCEED TO NEXT CIR

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LEXUS LS430 2003  Factory Repair Manual AIR DUCT SENSOR RESISTANCE
HINT: 
As the temperature increases, the resistance decreases. 
Fig. 57: Inspecting Air Duct Sensor
 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
NG: REPLACE AIR DUCT SENS

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LEXUS LS430 2003  Factory Repair Manual Standard:  
AIR CONDITIONING AMPLIFIER - AIR DUCT SENSOR RESISTANCE 
Tester connectionConditionSpecified condition
A13-15 (TFACEDr) - D7-1AlwaysBelow 1 ohms
A13-10 (SG-3) - D7-2AlwaysBelow 1 ohms
A13-

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LEXUS LS430 2003  Factory Repair Manual Fig. 58: Checking Harness And Connector (Air Conditioning Amplifier - Air Duct Sensor) 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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LEXUS LS430 2003  Factory Repair Manual NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
OK: REPLACE AIR CONDITIONING AMPLIFIER (SEE REPLACEMENT )  
CIRCUIT DESCRIPTION 
This sensor detects the register temperature and sends the appropriate signa

Page 279 of 4500

LEXUS LS430 2003  Factory Repair Manual a. Connect the hand-held tester to the DLC3.  
b. Turn the ignition switch to the ON position and push the hand-held tester main switch on.  
c. Select the item below in the DATA LIST, and read the di

Page 280 of 4500

LEXUS LS430 2003  Factory Repair Manual Fig. 61: Inspecting Air Conditioning Amplifier (TFACEPA - SG-4) 
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. 
Result:  
AIR CONDITIONING AMPLIFIER (TFACEPA - SG-4) TEST RESULT 
B: PROCEED TO NEXT CIR