| Description |

| 1. |
General description
WU is a sensor placed in the tire that reports pressure and temperature.
The WU is mounted inside the wheels, fixed to the valve. The angle between
the valve and the housing of the WU is variable.
This allows adaptation to various types of rims.
The Wheel Unit is made of a PCB supporting the electronic hardware and
encapsulated inside a housing which is potted with polyurethane.
It is self-powered by a battery and includes all systems for parameter
measurement (pressure, temperature and centrifugal acceleration and
optionally rotation direction), RF transmission and LF detection.
To achieve the specified battery lifetime, the WU supports various measurement
and transmission timings, depending on WU operation mode.
For RF transmission, WU uses an internal antenna.
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| 2. |
First Block Mode
: When vehicle start driving, Sensor enter Mode First Block.
Typical period of RF emissions is 16 sec. for 40 times for Auto-learning
and Auto-location function.
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| 3. |
Driving Mode
: After 19 min. parking and then finishing Mode First Block mode, WU
enter Driving mode.
Typical period of RF emissions are 64 sec above 4g vehicle speed.
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| 4. |
Parking Mode
: at below 3g Vehicle speed, enter Parking mode.
Typical periodicities of RF emissions are 13 hours.
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TPMS Inspection method Inspection • Find the inspection number by referring to the table above.
Replacement 1. Remove the wheel and tire. 2. Remove the valve core and deflate the tire. 3.
Description The In-car air temperature sensor is built in the heater & A/C control unit. The sensor contains a thermistor which measures the temperature of the inside. The signal decided by the resistance value which changes in accordance with perceived inside temperature, is delivered to heater control unit and accord
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