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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 B1D02-11: Headlight Hi (LH) Circuit Malfunction [Electrical Supply Unit (ESU)] >> Notes

DTC B1D02-11: Headlight Hi (LH) Circuit Malfunction [Electrical Supply Unit (ESU)]: Notes

DTC B1D02-11: (ELECTRICAL SUPPLY UNIT) DETECTION CONDITION AND POSSIBLE CAUSE

Description Headlight HI (LH) circuit malfunction
Detection condition
  • Electrical supply unit (ESU) detects a short to ground in the headlight HI (LH) circuit.
Fail-safe Not applicable
Possible cause
  • Front combination light (LH) connector or terminal malfunction
  • Electrical supply unit (ESU) connector or terminal malfunction
  • Short to ground in wiring harness between front combination light (LH) terminal A and electrical supply unit (ESU) terminal 4A
  • Front combination light (LH) malfunction
  • Electrical supply unit (ESU) malfunction
G14594967Courtesy of MAZDA MOTORS CORP.