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Home >> Mazda >> 2016 >> 3 Sport, 4D Hatchback, Standard Trans >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> On-Board Diagnostic [Vehicle Control Module - V/C-Module] >> DTC U101C-00; U101D-00; U1A00-88: Radar Sensor Communication Error >> Notes
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DTC U101C-00; U101D-00; U1A00-88: Radar Sensor Communication Error: Notes

System malfunction location
  • U101C:00: Radar sensor communication error
  • U101D:00: Error signal received from radar sensor
  • U1A00:88: CAN communication error (Bus off)
Detection condition 
  • Communication error between radar sensor and vehicle control module (V/C-module)
Fail-safe 
  • Inhibits the Mazda radar cruise control (MRCC) system control
  • Inhibits the forward obstruction warning (FOW) system control
Possible cause 
  • Connector or terminal malfunction
  • Short circuit to power supply or ground in wiring harness between radar sensor and vehicle control module (V/C-module)
  • Open circuit in wiring harness between radar sensor and vehicle control module (V/C-module)
  • Radar sensor malfunction
  • Vehicle control module (V/C-module) malfunction
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