RX400h · Service Manual HEATER & AIR CONDITIONING SYSTEM

ON-VEHICLE INSPECTION

Inspection


INSPECT A/C ROOM TEMPERATURE SENSOR
  1. Remove the A/C room temperature sensor.

  1. E108929E10
    Disconnect the connector from the A/C room temperature sensor.

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

    I040673E01

    Resistance:
    Tester connection
    Condition
    Specified condition
    1 (THR) - 2 (GND)
    10°C (50°F)
    3.00 to 3.73 kΩ
    1 (THR) - 2 (GND)
    15°C (59°F)
    2.45 to 2.88 kΩ
    1 (THR) - 2 (GND)
    20°C (68°F)
    1.95 to 2.30 kΩ
    1 (THR) - 2 (GND)
    25°C (77°F)
    1.60 to 1.80 kΩ
    1 (THR) - 2 (GND)
    30°C (86°F)
    1.28 to 1.47 kΩ
    1 (THR) - 2 (GND)
    35°C (95°F)
    1.00 to 1.22 kΩ
    1 (THR) - 2 (GND)
    40°C (104°F)
    0.80 to 1.00 kΩ
    1 (THR) - 2 (GND)
    45°C (113°F)
    0.65 to 0.85 kΩ
    1 (THR) - 2 (GND)
    50°C (122°F)
    0.50 to 0.70 kΩ
    1 (THR) - 2 (GND)
    55°C (131°F)
    0.44 to 0.60 kΩ
    1 (THR) - 2 (GND)
    60°C (140°F)
    0.36 to 0.50 kΩ

    NOTICE:
    1. Even slightly touching the sensor may change the resistance value. Be sure to hold the connector of the sensor.
    2. When measuring, the sensor temperature must be the same as the ambient temperature.

    HINT:
    As the temperature increases, the resistance decreases (see the graph).

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