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Electric Parking Brake System Description - Clutch Pedal Stroke Sensor
Overview
The clutch pedal stroke sensor is located in the clutch pedal assembly. The clutch pedal stroke sensor detects the stroke of clutch pedal, and outputs two kinds of voltage values depending on the given angle. The VSA modulator-control unit determines the clutch engagement status from the clutch pedal stroke sensor. In addition, the VSA modulator-control unit sends the clutch pedal stroke sensor value to the PCM via F-CAN. Clutch pedal stroke sensor zero point learning:
The VSA modulator-control unit learns the clutch pedal stroke sensor position when the clutch pedal is fully released. This learning is automatically performed when the ignition switch is turned on without pressing the clutch pedal after you do any of these actions:
Clutch engagement point learning
The clutch engagement point learning is necessary to release the parking brake in an appropriate timing when the drive away assist function operates. When starting the vehicle, the learning is automatically performed based on the clutch pedal position signal, the engine speed signal, and the accelerator pedal position signal. The VSA modulator-control unit learns the clutch pedal position value by calculating the value from the engine speed changing rate when the accelerator pedal signal is lower than the determined threshold. This learning is performed several times whenever the ignition switch is turned on. |
