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Home › Hyundai › 2012 › Equus Signature › Repair and Diagnosis › Brakes › Traction Control › Electronic Stability Control Diagnosis › DTC C1604: ECU Hardware Error › Component Inspection

Component Inspection

  1. Ignition "OFF" & Engine "OFF".
  2. Ignition "ON" & Engine "OFF".
  3. Connect GDS and select "Diagnostic Trouble Codes (DTCs)" mode.
  4. Using a GDS, Clear DTC.
  5. Using a GDS, Check DTC present.
  6. Are any DTCs present?

    YES 

    Substitute with a known-good HECU and check for proper operation.

    If problem is corrected, replace HECU and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    In a case of replacing HECU, operate each sensor's calibration by scantool, including the steering angle sensor's calibration.

    NO 

    This fault may be intermittently caused by poor connection in the HECU or HECU connector or was repaired and HECU memory was not cleared. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.

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