id021200201000
Purpose, Outline
System structural view
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System wiring diagram
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Detection method
Function
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Function |
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DSC HU/CM
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• Calculates the change in tire pressure for each wheel based on the tire rotation speed signal from the ABS wheel-speed sensor and monitors the fluctuation value.
• If the fluctuation value of the tire pressure decreases to the specified value, the system determines that a tire pressure has decreased and turns on the tire pressure monitoring system warning light.
• The tire pressure monitoring system warning light illumination signal is sent to the instrument cluster via a CAN signal.
• If a malfunction occurs in the tire pressure monitoring system, determination is made to flash the tire pressure monitoring system warning light.
• The tire pressure monitoring system warning light flash signal is sent to the instrument cluster via a CAN signal.
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ABS wheel-speed sensor
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• The wheel speed is sent to the DSC HU/CM.
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Ambient temperature sensor
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• The ambient temperature is sent to the PCM.
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PCM
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• The ambient temperature is sent to the DSC HU/CM via a CAN signal.
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Instrument cluster
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Tire pressure monitoring system warning light
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• The tire pressure monitoring system warning light illuminates by the illumination signal from the DSC HU/CM.
• The tire pressure monitoring system warning light flashes for approx. 1 min by the flash signal from the DSC HU/CM, and then it illuminates.
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Tire pressure monitoring system warning alarm
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• The tire pressure monitoring system warning alarm sound is triggered by the warning alarm request signal from the DSC HU/CM.
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Tire pressure monitoring system set switch
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• The initialization signal is sent to the instrument cluster.
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Instrument cluster
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• The initialization signal is sent to the DSC HU/CM via a CAN signal.
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Operation
The tire pressure monitoring system operates as shown in the following figure.
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Mis-use prevention logic
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Tire pressure monitoring system warning light does not illuminate
Tire pressure monitoring system does not operate normally