DTC 51-12: Motor Power Source Circuit Malfunction

2015 Acura TLX Base, 2.4L EngSECTION DTC 51-12: Motor Power Source Circuit Malfunction
Confirmation Procedure Operating Condition:
  • 1.

    Turn the vehicle to the ON mode.

Execution Initial Diagnosis/Regular Diagnosis
Duration About 1 second
DTC Type
  • 1 drive cycle
  • ABS indicator on
  • VSA indicator on
  • Brake system indicator (amber) on
  • Brake system indicator (red) on
Fail Safe Action
  • Stop ABS function
  • Stop VSA function
  • Stop TCS function
  • Stop hill start assist function
  • Stop engine drag torque function
  • Stop brake assist function
  • Stop automatic brake hold function
  • Stop agile handling assist function
  • Stop ACC/CMBS function (With ACC)
Possible Cause
  • Open or Short to ground between the VSA modulator-control unit and the under-hood fuse/relay box (+B ABS/VSA MTR line)
  • Blown fuse (Under-hood fuse/relay box No. A1-3 (40 A))
  • VSA modulator-control unit internal failure
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.