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Home >> Mazda >> 2016 >> 6 Touring, Standard Trans >> Repair and Diagnosis (Single Page) >> Brakes >> Parking Brake System >> On-Board Diagnostics [Electric Parking Brake] >> DTC U0001-87; U0001-88; U0100-00; U0101-00; U0121-00; U0151-00; U0155-00: Unit Communication Error >> Notes

DTC U0001-87; U0001-88; U0100-00; U0101-00; U0121-00; U0151-00; U0155-00: Unit Communication Error: Notes

Description
  • U0001:87
    • Unit communication error (HS-CAN)
  • U0001:88
    • Unit communication error (HS-CAN)
  • U0100:00
    • Communication error with PCM
  • U0101:00
    • Communication error with TCM
  • U0121:00
    • Communication error with DSC HU/CM
  • U0151:00
    • Communication error with SAS control module
  • U0155:00

  • Communication error with instrument cluster
Detection condition 
  • U0001:87
    • Electric parking brake control module detects that a CAN signal is not received with the ignition switched ON (engine off or on).
  • U0001:88
    • Electric parking brake control module detects the CAN bus communication line (HS-CAN) malfunction with the ignition switched ON (engine off or on).
  • U0100:00
    • Electric parking brake control module could not receive the CAN signal from the PCM with the ignition switched ON (engine off or on).
  • U0101:00
    • Electric parking brake control module could not receive the CAN signal from the TCM with the ignition switched ON (engine off or on).
  • U0121:00
    • Electric parking brake control module could not receive the CAN signal from the DSC HU/CM with the ignition switched ON (engine off or on).
  • U0151:00
    • Electric parking brake control module could not receive the CAN signal from the SAS control module with the ignition switched ON (engine off or on).
  • U0155:00

  • Electric parking brake control module could not receive the CAN signal from the instrument cluster with the ignition switched ON (engine off or on).
Fail-safe 
  • U0001:87
    • Not applicable
  • U0001:88
    • Not applicable
  • U0100:00
    • Not applicable
  • U0101:00
    • Not applicable
  • U0121:00
    • Not applicable
  • U0151:00
    • Not applicable
  • U0155:00

  • Not applicable
Possible cause 
  • Malfunction in CAN bus communication line
  • Malfunction in CAN communication line between PCM and electric parking brake control module
  • Malfunction in CAN communication line between TCM and electric parking brake control module
  • Malfunction in CAN communication line between DSC HU/CM and electric parking brake control module
  • Malfunction in CAN communication line between SAS control module and electric parking brake control module
  • Malfunction in CAN communication line between instrument cluster and electric parking brake control module
System wiring diagram  Not applicable
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