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Home >> Mazda >> 2021 >> MX-5 Miata Club, Automatic Trans >> Repair and Diagnosis >> Body & Frame >> Door Locks >> On-Board Diagnostic - Retractable Fastback Control Module >> DTC U0402-86: Error Signal Received From TCM [Retractable Hardtop Control Module] >> Notes
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DTC U0402-86: Error Signal Received From TCM [Retractable Hardtop Control Module]: Notes

DTC U0402:86 (RETRACTABLE HARDTOP CONTROL MODULE) DETECTION CONDITION AND POSSIBLE CAUSE

Description Error signal received from TCM
Detection condition
  • The retractable hardtop control module receives an error signal from the TCM with the ignition switched ON (engine off or on).
Fail-safe
  • Stops retractable hardtop operation
Possible cause
  • TCM stores DTCs
  • TCM malfunction
  • Retractable hardtop control module malfunction
System wiring diagram Not applicable