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HOMESERVICE MANUALSLEXUS2012CT 200H L4-1.8L (2ZR-FXE) HYBRIDREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGHUMIDITY SENSORTESTING AND INSPECTION
2012 Lexus CT 200h L4-1.8L (2ZR-FXE) Hybrid
Humidity Sensor: Testing and Inspection
2012 Lexus CT 200h L4-1.8L (2ZR-FXE) HybridSECTION Testing and Inspection
HEATING / AIR CONDITIONING: HUMIDITY SENSOR: INSPECTION
1. INSPECT AIR CONDITIONING THERMISTOR ASSEMBLY
(a) for Glass temperature sensor
(1) Remove the air conditioning thermistor assembly (glass temperature sensor).
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NOTICE:
* Hold the sensor only by its connector. Touching the sensor may change the resistance value.
* When measuring, the sensor temperature must be the same as the ambient temperature.
HINT
As the temperature increases, the resistance decreases (see the graph).
If the resistance is not as specified, replace the air conditioning thermistor assembly (glass temperature sensor).
Text in Illustration
(b) for Glass surroundings temperature sensor
(1) Remove the air conditioning thermistor assembly (glass surroundings temperature sensor).
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
NOTICE:
* Hold the sensor only by its connector. Touching the sensor may change the resistance value.
* When measuring, the sensor temperature must be the same as the ambient temperature.
HINT
As the temperature increases, the resistance decreases (see the graph).
If the resistance is not as specified, replace the air conditioning thermistor assembly (glass surroundings temperature sensor).
Text in Illustration
(c) for Glass humidity sensor
(1) Remove the air conditioning thermistor assembly (glass humidity sensor) with the connector still connected.
(2) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
NOTICE:
* Do not touch the sensor as body heat will affect the inspection results. When performing the inspection, hold the sensor by its connector.
* Allow the sensor to acclimate to the ambient temperature and humidity before performing the inspection.
* The specified voltages in the table above are based on inspections performed when the ambient temperature is 25°C (77°F).
HINT
As the humidity increases, the voltage increases (see the graph).
If the voltage is not as specified, replace the air conditioning thermistor assembly (glass humidity sensor).
Text in Illustration
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.