Toyota Yaris: Heating / Air Conditioning / Room Temperature Sensor
Components
COMPONENTS
ILLUSTRATION
*1 | NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY | *2 | COOLER THERMISTOR (ROOM TEMPERATURE SENSOR) |
*3 | ASPIRATOR | - | - |
Removal
REMOVAL
PROCEDURE
1. REMOVE NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY
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2. REMOVE COOLER THERMISTOR (ROOM TEMPERATURE SENSOR)
(a) Disconnect the connector and aspirator. | |
(b) Using a screwdriver with its tip wrapped in protective tape, disengage the claws to remove the cooler thermistor (room temperature sensor). | |
Inspection
INSPECTION
PROCEDURE
1. INSPECT COOLER THERMISTOR (ROOM TEMPERATURE SENSOR)
(a) Check the resistance.
(1) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection | Condition | Specified Condition | H58-1 (+) - H58-2 (-) | 10°C (50°F) | 3.00 to 3.73 kΩ | H58-1 (+) - H58-2 (-) | 15°C (59°F) | 2.45 to 2.88 kΩ | H58-1 (+) - H58-2 (-) | 20°C (68°F) | 1.95 to 2.30 kΩ | H58-1 (+) - H58-2 (-) | 25°C (77°F) | 1.60 to 1.80 kΩ | H58-1 (+) - H58-2 (-) | 30°C (86°F) | 1.28 to 1.47 kΩ | H58-1 (+) - H58-2 (-) | 35°C (95°F) | 1.00 to 1.22 kΩ | H58-1 (+) - H58-2 (-) | 40°C (104°F) | 0.80 to 1.00 kΩ | H58-1 (+) - H58-2 (-) | 45°C (113°F) | 0.65 to 0.85 kΩ | H58-1 (+) - H58-2 (-) | 50°C (122°F) | 0.50 to 0.70 kΩ | H58-1 (+) - H58-2 (-) | 55°C (131°F) | 0.44 to 0.60 kΩ | H58-1 (+) - H58-2 (-) | 60°C (140°F) | 0.36 to 0.50 kΩ | NOTICE: -
Hold the cooler thermistor (room temperature sensor) only by its connector. Touching the sensing portion may change the resistance value.
-
When measuring, the cooler thermistor (room temperature sensor) temperature must be the same as the ambient temperature.
HINT: As the temperature increases, the resistance decreases (see the graph). If the result is not as specified, replace the cooler thermistor (room temperature sensor). |
| *a | Component without harness connected (Cooler Thermistor (Room Temperature Sensor)) | *b | Sensing Portion | *c | Resistance (kΩ) | *d | Temperature (°C (°F)) | *e | Allowable Range | | |
Installation
INSTALLATION
PROCEDURE
1. INSTALL COOLER THERMISTOR (ROOM TEMPERATURE SENSOR)
(a) Engage the claws to install the cooler thermistor (room temperature sensor). | |
(b) Connect the connector and aspirator.
2. INSTALL NO. 1 INSTRUMENT PANEL UNDER COVER SUB-ASSEMBLY
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