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Home >> Mazda >> 2017 >> CX-9 Touring, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> On-Board Diagnostic - Connectivity Master Unit >> DTC U0001-88; U0100-00; U0101-00; U0121-00; U0131-00; U0140-00; U0151-00; U0155-00; U0182-00; U0214-00; U0235-00; U023A-00; Module Communication Errors >> Notes

DTC U0001-88; U0100-00; U0101-00; U0121-00; U0131-00; U0140-00; U0151-00; U0155-00; U0182-00; U0214-00; U0235-00; U023A-00; Module Communication Errors: Notes

DTC U0001:88/U0100:00/U0101:00/U0121:00/U0131:00/U0140:00/U0151:00/U0155:00/U0182:00/U0214:00/U0235:00/U023A:00 (CONNECTIVITY MASTER UNIT) - DETECTION CONDITION & POSSIBLE CAUSE

Description
  • 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 electric power steering (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
  • U0182:00
    • Communication error with auto leveling control module or adaptive front lighting system (AFS) control module
  • U0214:00
    • Communication error with start stop unit
  • U0235:00
    • Communication error with laser sensor
  • U023A:00
    • Communication error with forward sensing camera (FSC)
Detection condition
  • U0001:88
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot detect a CAN bus communication line (HS-CAN) signal for 1 s or more.
      • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) detects malfunction in the CAN bus communication line (HS-CAN) 10 times continuously.
  • U0100:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the PCM for 5 s or more.
  • U0101:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the TCM for 5 s or more.
  • U0121:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the DSC HU/CM for 5 s or more.
  • U0131:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the electric power steering (EPS) control module for 5 s or more.
  • U0140:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the front body control module (FBCM) for 5 s or more.
  • U0151:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the SAS control module for 5 s or more.
  • U0155:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the instrument cluster for 5 s or more.
  • U0182:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the auto leveling control module or adaptive front lighting system (AFS) control module for 5 s or more.
  • U0214:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the start stop unit for 5 s or more.
  • U0235:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the laser sensor for 5 s or more.
  • U023A:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the forward sensing camera (FSC) for 5 s or more.
Fail-safe
  • U0001:88
    • Not applicable
  • U0100:00
    • Not applicable
  • U0101:00
    • Not applicable
  • U0121:00
    • Not applicable
  • U0131:00
    • Not applicable
  • U0140:00
    • Not applicable
  • U0151:00
    • Not applicable
  • U0155:00
    • Not applicable
  • U0182:00
    • Not applicable
  • U0214:00
    • Not applicable
  • U0235:00
    • Not applicable
  • U023A:00
    • Not applicable
Possible cause
  • Malfunction in CAN bus communication line
  • Malfunction in CAN communication line between the PCM and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the TCM and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the DSC HU/CM and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the electric power steering (EPS) control module and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the front body control module (FBCM) and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the SAS control module and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the instrument cluster and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the auto leveling control module or adaptive front lighting system (AFS) control module and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the start stop unit and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the laser sensor and connectivity master unit (CMU)
  • Malfunction in CAN communication line between the forward sensing camera (FSC) and connectivity master unit (CMU)
System wiring diagram Not applicable
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