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Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
159 15. DTC P0504 Unreliable comparison between main and auxiliary brake pedal signals
Fault Description: The brake switch detects the brake pedal action and sends the signal to ECU. The brake switch is Diagnosis Hint: Check the wiring connector for poor contact, distorted or damaged terminal. Terminal ECU
K17 Main brake switch signal
K80 Auxiliary brake switch signal
Main brake switch Auxiliary brake switch |