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HOMESERVICE MANUALSACURA2018TLX BASE, 2.4L ENGREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESTRACTION CONTROLVSA SYSTEM - DIAGNOSTICS (1 OF 2)VSA DTC ADVANCED DIAGNOSTICSDTC ADVANCED DIAGNOSTICS: VSA RELATED DTCS (2018-19)DTC U3000-49: ECU INTERNAL CIRCUIT FAILURE
2018 Acura TLX Base, 2.4L Eng

DTC U3000-49: ECU Internal Circuit Failure

2018 Acura TLX Base, 2.4L EngSECTION DTC U3000-49: ECU Internal Circuit Failure
Confirmation Procedure Basic Condition:
  • 12 volt battery voltage 9.6 - 16.5 V
  • ABS/VSA function not in operation

With the Driving Pattern:

  • 1.

    Start the engine.

  • 2.

    Test-drive the vehicle at 25 mph (40 km/h) or more.

    (Be careful of the surrounding traffic conditions.)
Execution Initial Diagnosis/Regular Diagnosis
Duration About 1 second
DTC Type
  • 1 drive cycle
  • Brake system indicator (red) on (Dependent upon the conditions)
  • Brake system indicator (amber) on (Dependent upon the conditions)
  • ABS indicator on (Dependent upon the conditions)
  • VSA indicator on (Dependent upon the conditions)
Fail Safe Action
  • Stop CAN function (Dependent upon the conditions)
  • Degrade EBD performance (Dependent upon the conditions)
  • Stop ABS function or Degrade ABS performance (Dependent upon the conditions)
  • Stop engine drag torque control function
  • Stop starting assist brake function
  • Stop TCS function (Fade out) (Dependent upon the conditions)
  • Stop VSA function
  • Stop brake assist function
  • Stop hill start assist function
  • Stop agile handling assist function
  • Stop parking cooperation assist function
  • Stop automatic brake hold function or fade out (Dependent upon the conditions)
  • Stop ACC function
  • Stop CMBS function
Possible Cause
  • 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:

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