Tuesday, February 19, 2019

2010 Lexus Truck RX 350 AWD V6-3.5L (2GR-FE) B CODE Page 417


NG -- REPLACE AMBIENT TEMPERATURE SENSOR



OK -- Continue to next step.



3. CHECK HARNESS AND CONNECTOR (AMBIENT TEMPERATURE SENSOR - A/C AMPLIFIER)



(a) Disconnect the A/C amplifier connector.



(b) Measure the resistance according to the value(s) in the table below.



Standard Resistance:



Text in Illustration



NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR



OK -- REPLACE A/C AMPLIFIER



Up to 08/2009



HEATING / AIR CONDITIONING: AIR CONDITIONING SYSTEM: B1413/13: Evaporator Temperature Sensor Circuit



B1413/13 - Evaporator Temperature Sensor Circuit



DESCRIPTION



The evaporator temperature sensor is installed on the evaporator in the air conditioning unit to detect the cooled air temperature that has passed



through the evaporator and to control the air conditioning. It sends appropriate signals to the A/C amplifier. The resistance of the evaporator



temperature sensor changes in accordance with the cooled air temperature that has passed through the evaporator. As the temperature decreases, the



resistance increases. As the temperature increases, the resistance decreases.



The A/C amplifier applies voltage (5 V) to the evaporator temperature sensor and reads voltage changes as the resistance of the evaporator



temperature sensor changes. This sensor is used for frost prevention.

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