2003 LEXUS LS430 Factory Repair Manual

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Page 249 of 4500

LEXUS LS430 2003 Factory Repair Manual DTC B1442AIR INLET DAMPER CONTROL SERVOMOTOR CIRCUIT DTC B1451COMPRESSOR SOLENOID CIRCUIT DTC B1461EMISSION GAS NOX SENSOR CIRCUIT

Page 250 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 34: Diagnostic Trouble Code Information Chart Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. HINT: *1 If the room temperature is approximately -20°C (-4°F) or lower, DTC B1411/11 may be output

Page 251 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 36: Room Temperature Sensor Circuit Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. INSPECTION PROCEDURE 1.READ VALUE ON HAND-HELD TESTER a. Connect the hand-held tester to the DLC3. b. Turn t

Page 252 of 4500

LEXUS LS430 2003 Factory Repair Manual AIR CONDITIONER TEST RESULT B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C: REPLACE AIR CONDITIONING AMPLIFIER (SEE REPLACEMENT ) A 2.INSPECT COOLER (ROOM TEMPERATURE SENS

Page 253 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 37: Identifying Terminals Of A14 A/C Room Temperature Sensor Connector Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. HINT: As the temperature increases, the resistance decreases (see the graph

Page 254 of 4500

LEXUS LS430 2003 Factory Repair Manual Fig. 38: Resistance/Temperature Graph Courtesy of TOYOTA MOTOR SALES, U.S.A., INC. NG: REPLACE COOLER (ROOM TEMPERATURE SENSOR) THERMISTOR OK: Go to next step 3.INSPECT AIR CONDITIONING AMPLIFIE

Page 255 of 4500

LEXUS LS430 2003 Factory Repair Manual B: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE C: REPLACE AIR CONDITIONING AMPLIFIER (SEE REPLACEMENT ) Fig. 39: Inspecting Air Conditioning Amplifier (TR - SG-2) Courtesy o

Page 256 of 4500

LEXUS LS430 2003 Factory Repair Manual NG: REPAIR OR REPLACE HARNESS OR CONNECTOR Tester connectionConditionSpecified condition A13-16 (TR) - A14-1AlwaysBelow 1 ohms A13-9 (SG-2) - A14-2AlwaysBelow 1 ohms A13-16 (TR) - Body groundAlways10
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