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Home >> Mazda >> 2021 >> MX-5 Miata Club, Standard Trans >> Repair and Diagnosis >> Body & Frame >> Door Locks >> On-Board Diagnostic - Retractable Fastback Control Module >> DTC U0001-88/U0100-00/U0101-00/U0155-00: Communication Error [Retractable Hardtop Control Module] >> Notes
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DTC U0001-88/U0100-00/U0101-00/U0155-00: Communication Error [Retractable Hardtop Control Module]: Notes

DTC U0001:88/U0100:00/U0101:00/U0155:00 (RETRACTABLE HARDTOP CONTROL MODULE) DETECTION CONDITION AND POSSIBLE CAUSE

Description
  • U0001:88
    • Module communication error (HS-CAN)
  • U0100:00
    • Communication error with PCM
  • U0101:00
    • Communication error with TCM
  • U0155:00
  • Communication error with instrument cluster
Detection condition
  • U0001:88
    • Retractable hardtop 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
    • Retractable hardtop control module could not receive the CAN signal from the PCM for 5 s or more with the ignition switched ON (engine off or on).
  • U0101:00
    • Retractable hardtop control module could not receive the CAN signal from the TCM for 1 s or more with the ignition switched ON (engine off or on).
  • U0155:00
  • Retractable hardtop control module could not receive the CAN signal from the instrument cluster for 2 s or more with the ignition switched ON (engine off or on).
Fail-safe
  • U0001:88
    • Stops retractable hardtop operation
  • U0100:00
    • Stops retractable hardtop operation
  • U0101:00
    • Stops retractable hardtop operation
  • U0155:00
  • Stops retractable hardtop operation
Possible cause
  • Malfunction in CAN bus communication line
  • Malfunction in CAN line between PCM and retractable hardtop control module
  • Malfunction in CAN line between TCM and retractable hardtop control module
  • Malfunction in CAN line between instrument cluster and retractable hardtop control module
System wiring diagram Not applicable