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Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
87 2)Working Principle The signal of vehicle speed sensor provides vehicle speed signal to the ECU, based on which the ECU calculates the 3)Measurement analysis
10. Clutch switch 1) Overview The clutch switch is located on the upper portion of the clutch pedal and is mainly functioned for cruise control and 2) Working Principle The clutch switch is installed at the clutch pedal and transmits the operation signal of clutch pedal to the engine ECU. 3) Measurement analysis
4) Malfunction Mode Short-circuit or open-circuit of sensor; Unstable sensor signal; Sensor signal is out of range. 5) Troubleshooting Use Sunray special diagnosis instrument to check the trouble code and determine the malfunction position. Mainly Input signal of vehicle speed sensor |