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Home >> Hyundai >> 2021 >> Ioniq Hybrid SEL >> Repair and Diagnosis >> Brakes >> Parking Brake System >> Parking Brake System Diagnosis (HEV) >> DTC C1604-04: ECU Hardware Error >> DTC Inspection >> Monitor DTC Status

Monitor DTC Status

  1. Vehicle parked and Ignition switch 'ON'.
  2. Connect GDS and select "DTC Analysis" mode.
  3. Click "DTC Status" on the "Diagnostic Trouble Codes (DTC)" menu bar to see "DTC Information".
  4. If DTC Status is "Present" fault, then go to the next procedure, and if it is "History" fault, then clear DTC and check the same DTC reoccurs.
    G13843623Courtesy of HYUNDAI MOTOR AMERICA
  5. Is parameter displayed "Present" fault?

    YES 

    • Substitute with a known-good EPB Module and check for proper operation. If problem is corrected, replace EPB Module, and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
    • Perform actuation by EPB switch and check whether it is operating correctly.

    NO