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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 85 (On-Board Diagnostics [Electric Parking Brake]) >> DTC U0001-88: U0100-00: U0101-00: U0121-00: U0151-00: U0155-00: Communication Error

DTC U0001-88: U0100-00: U0101-00: U0121-00: U0151-00: U0155-00: Communication Error

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.
Description
  • 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
  • U0001:88
    • Electric parking brake control module detects the CAN bus communication line (HS-CAN) malfunction 10 times continuously 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 
  • U0001:88
    • 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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