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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 67 (On-Board Diagnostic - Connectivity Master Unit) >> DTC U0001-88; U0100-00; U0101-00; U0104-00; U0121-00; U0131-00; U0140-00; U0151-00; U0155-00; U0182-00; U0214-00; U0235-00; U023A-00: Module Communication Error >> Notes

DTC U0001-88; U0100-00; U0101-00; U0104-00; U0121-00; U0131-00; U0140-00; U0151-00; U0155-00; U0182-00; U0214-00; U0235-00; U023A-00: Module Communication Error: Notes

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
    • Module communication error (HS-CAN)
  • U0100:00
    • Communication error with PCM
  • U0101:00
    • Communication error with TCM
  • U0104:00
    • Communication error with vehicle control module (V/C-module)
  • 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
  • U0182:00
    • Communication error with 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)
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  .
  • U0104:00
    • With the ignition switched ON (engine off or on), the connectivity master unit (CMU) cannot receive a CAN signal from the vehicle control module (V/C-module) 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 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 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 function 
  • U0001:88
    • Not applicable
  • U0100:00
    • Not applicable
  • U0101:00
    • Not applicable
  • U0104:00
    • 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 vehicle control module (V/C-module) 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 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 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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