LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Hyundai >> 2012 >> Equus Signature >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Intelligent ACCEL Pedal Diagnosis >> C1604 ECU Hardware Error >> Component Inspection
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Component Inspection

  1. Using a GDS, Clear DTC.
  2. IG Key "ON" or Engine "ON'.
  3. Using a GDS, Clear DTC present.
  4. Using a GDS, Check DTC present.
  5. Are any DTCs present?

    YES 

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

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

    NO 

    Fault is intermittently caused was repaired and memory was not cleared.

    Go to "VERIFICATION OF VEHICLE REPAIR " procedure