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Home >> Mazda >> 2022 >> MX-5 Miata RF Club >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> On-Board Diagnostic - Electric Supply Unit (ESU) >> DTC B143A-00: Collision Detection Unlock Function Operation [Electrical Supply Unit (ESU)] >> Notes

DTC B143A-00: Collision Detection Unlock Function Operation [Electrical Supply Unit (ESU)]: Notes

DTC B143A-00: (ELECTRICAL SUPPLY UNIT) DETECTION CONDITION AND POSSIBLE CAUSE

Description Collision detection unlock function operation
Detection condition
  • Electrical supply unit (ESU) operates the collision detection unlock function.
Fail-safe Not applicable
Possible cause
CAUTION:
  • The electrical supply unit (ESU) operates the collision detection unlock function in the event of a collision to enhance rescue operation from outside the vehicle. The electrical supply unit (ESU) operates the collision detection unlock function and outputs this DTC simultaneously. Explain to the customer that this may not indicate a malfunction even if this DTC is output.
  • Collision detection unlock function operated due to vehicle collision.
  • Electrical supply unit (ESU) internal malfunction
System wiring diagram Not applicable