Inspection [10/2014 - ]: Procedure
- INSPECT AIR CONDITIONING THERMISTOR ASSEMBLY (HUMIDITY SENSOR)
- for Glass temperature sensor:
- Measure the resistance according to the value(s) in the table below.
*a Component without harness connected
(Air Conditioning Thermistor Assembly (Glass Temperature Sensor))*b Heat Conduction Sheet Part *c Resistance (kΩ) *d Temperature (°C (°F)) STANDARD RESISTANCETester Connection Condition Specified Condition T13-1(SEG3) - T13-4(TFG) 10°C (50°F) 5.92 to 6.09 kΩ 15°C (59°F) 4.94 to 5.07 kΩ 20°C (68°F) 4.20 to 4.29 kΩ 25°C (77°F) 3.64 to 3.70 kΩ 30°C (86°F) 3.19 to 3.26 kΩ 35°C (95°F) 2.85 to 2.91 kΩ 40°C (104°F) 2.58 to 2.64 kΩ 45°C (113°F) 2.37 to 2.43 kΩ 50°C (122°F) 2.21 to 2.26 kΩ 55°C (131°F) 2.07 to 2.12 kΩ 60°C (140°F) 1.97 to 2.01 kΩ NOTE:- 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 humidity increases, the voltage increases (see the graph).
- If the resistance is not as specified, replace the air conditioning thermistor assembly (glass temperature sensor).
- Measure the resistance according to the value(s) in the table below.
- for Humidity sensor:
- Remove the air conditioning thermistor assembly (humidity sensor) with the connector still connected.
- Turn the engine switch on (IG).
- Measure the voltage according to the value(s)in the table below.
*a Component without harness connected
(Air Conditioning Thermistor Assembly (Humidity Sensor))*b Heat Conduction Sheet Part *c Voltage (V) *d Relative Humidity (%) STANDARD VOLTAGETester Connection Condition Specified Condition T13-1(SEG3) - T13-3(RH) IG ON
Humidity is 5 to 15 %1.01 V IG ON
Humidity is 15 to 25 %1.37 V IG ON
Humidity is 25 to 35 %1.73 V IG ON
Humidity is 35 to 45 %2.09 V IG ON
Humidity is 45 to 55 %2.45 V IG ON
Humidity is 55 to 65 %2.81 V IG ON
Humidity is 65 to 75 %3.17 V IG ON
Humidity is 75 to 85%3.53 V IG ON
Humidity is 85 to 95 %3.89 V NOTE:- 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 (humidity sensor).
- for Glass surroundings temperature sensor:
- Measure the resistance according to the value(s) in the table below.
*a Component without harness connected
(Air Conditioning Thermistor Assembly (Glass Surroundings Temperature Sensor))*b Heat Conduction Sheet Part *c Resistance (kΩ) *d Temperature (°C (°F)) STANDARD RESISTANCETester Connection Condition Specified Condition T13-1(SEG3) - T13-2(TNG) 10°C (50°F) 5.92 to 6.09 kΩ 15°C (59°F) 4.94 to 5.07 kΩ 20°C (68°F) 4.20 to 4.29 kΩ 25°C (77°F) 3.64 to 3.70 kΩ 30°C (86°F) 3.19 to 3.26 kΩ 35°C (95°F) 2.85 to 2.91 kΩ 40°C (104°F) 2.58 to 2.64 kΩ 45°C (113°F) 2.37 to 2.43 kΩ 50°C (122°F) 2.21 to 2.26 kΩ 55°C (131°F) 2.07 to 2.12 kΩ 60°C (140°F) 1.97 to 2.01 kΩ NOTE:- 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 humidity increases, the voltage increases (see the graph).
If the resistance is not as specified, replace the air conditioning thermistor assembly (glass surroundings temperature sensor).
- Measure the resistance according to the value(s) in the table below.
- for Glass temperature sensor: