POWER BRAKE UNIT VACUUM SENSOR [SKYACTIV-G 2.5T]

id0140h0004600


Purpose

•  The PCM determines whether to enable engine start/enable engine restart of the i-stop control based on high/low vacuum in the power brake unit.

Function

•  Detects the vacuum in the power brake unit and sends it to the PCM as a power brake unit vacuum signal.

Power brake unit vacuum sensor characteristic

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Construction

•  The power brake unit vacuum sensor is located on the power brake unit.
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•  A piezoelectric element has been adopted for the detection area of the power brake unit vacuum sensor.
•  A piezoelectric element generates voltage when force such as vibration or pressure is applied to it. Using this characteristic, the sensor outputs the vacuum in the power brake unit as voltage.

Operation

1.  The power brake unit vacuum sensor detects (1) the vacuum in the power brake unit.

2.  The power brake unit vacuum sensor sends (2) the detected vacuum in the power brake unit to the PCM as a power brake unit vacuum signal.

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Fail-safe

DTC No.

Fail-safe function
P0555:00
•  Flashes the i-stop warning light (amber) and inhibits engine-stop by operating the i-stop function.