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Home >> Mazda >> 2016 >> 6 Touring, Standard Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> On-Board Diagnostic - Radar Unit >> DTC U0001-88; U0100-00; U0101-00; U0121-00; U0131-00; U0140-00; U0151-00; U0155-00; U0214-00; U0235-68; U023A-00: Module Communication Error >> Notes

DTC U0001-88; U0100-00; U0101-00; U0121-00; U0131-00; U0140-00; U0151-00; U0155-00; U0214-00; U0235-68; U023A-00: Module Communication Error: Notes

System malfunction location
  • U0001:88: Module communication error (HS-CAN)
  • U0100:00: Communication error with PCM
  • U0101:00: Communication error with TCM
  • U0121:00: Communication error with DSC HU/CM
  • U0131:00: Communication error with EPS control module
  • U0140:00: Communication error with front body control module (FBCM)
  • U0151:00: Communication error with SAS control module
  • U0155:00: Communication error with Instrument cluster
  • U0214:00: Communication error with start stop unit
  • U0235:68: Communication error with laser sensor
  • U023A:00: Communication error with forward sensing camera (FSC)
Detection condition 
  • U0001:88: Radar unit detects a CAN bus communication line (HS-CAN) malfunction.
  • U0100:00: Radar unit cannot receive the CAN signal from the PCM.
  • U0101:00: Radar unit cannot receive the CAN signal from the TCM.
  • U0121:00: Radar unit cannot receive the CAN signal from the DSC HU/CM.
  • U0131:00: Radar unit cannot receive the CAN signal from the EPS control module.
  • U0140:00: Radar unit cannot receive the CAN signal from the front body control module (FBCM).
  • U0151:00: Radar unit cannot receive the CAN signal from the SAS control module.
  • U0155:00: Radar unit cannot receive the CAN signal from the Instrument cluster.
  • U0214:00: Radar unit cannot receive the CAN signal from the start stop unit.
  • U0235:68: Radar unit cannot receive the CAN signal from the laser sensor.
  • U023A:00: Radar unit cannot receive the CAN signal from the forward sensing camera (FSC).
Fail-safe  U0001:88 
  • Inhibits the Mazda radar cruise control (MRCC) system control
  • Inhibits the forward obstruction warning (SBS) system control

U0100:00 
  • Inhibits the Mazda radar cruise control (MRCC) system control

U0101:00 
  • Inhibits the Mazda radar cruise control (MRCC) system control
  • Inhibits the forward obstruction warning (SBS) system control

U0121:00 
  • Inhibits the Mazda radar cruise control (MRCC) system control
  • Inhibits the forward obstruction warning (SBS) system control
U0131:00 
  • Inhibits the Mazda radar cruise control (MRCC) system control
  • Inhibits the forward obstruction warning (SBS) system control

U0140:00 
  • Inhibits the Mazda radar cruise control (MRCC) system control
  • Inhibits the forward obstruction warning (SBS) system control

U0151:00 
  • Inhibits the Mazda radar cruise control (MRCC) system control
  • Inhibits the forward obstruction warning (SBS) system control

U0155:00 
  • Inhibits the Mazda radar cruise control (MRCC) system control
  • Inhibits the forward obstruction warning (SBS) system control

U0214:00 
  • Inhibits the Mazda radar cruise control (MRCC) system control
  • Inhibits the forward obstruction warning (SBS) system control

U0235:68 
  • Not applicable

U023A:00 
  • Not applicable
Possible cause 
  • Malfunction in CAN bus communication line
  • Malfunction in CAN line between PCM and radar unit
  • Malfunction in CAN line between TCM and radar unit
  • Malfunction in CAN line between DSC HU/CM and radar unit
  • Malfunction in CAN line between EPS control module and radar unit
  • Malfunction in CAN line between front body control module (FBCM) and radar unit
  • Malfunction in CAN line between SAS control module and radar unit
  • Malfunction in CAN line between instrument cluster and radar unit
  • Malfunction in CAN line between start stop unit and radar unit
  • Malfunction in CAN line between laser sensor and radar unit
  • Malfunction in CAN line between forward sensing camera (FSC) and radar unit
System wiring diagram 
  • Not applicable