Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSHYUNDAI2011EQUUS SIGNATUREREPAIR AND DIAGNOSISBRAKESPARKING BRAKE SYSTEMELECTRIC PARKING BRAKE SYSTEM DIAGNOSISDTC C1604: ECU HARDWARE ERRORINSPECTION/REPAIRCOMPONENT INSPECTION
2011 Hyundai Equus Signature
Component Inspection
2011 Hyundai Equus SignatureSECTION Component Inspection
- IG "OFF"
- IG "ON"
- Connect scantool and select "Diagnostic Trouble Codes(DTCs)" mode.
- Using a scantool, Clear DTC.
- Using a scantool, Check DTC present.
- Are any DTCs present?
YES
- Substitute with a known-good EPB ECU(inside EPB ASS'Y) and check for proper operation.
- If problem is corrected, replace EPB ECU(inside EPB ASS'Y) and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- This fault may be intermittently caused by poor connection in the EPB ECU.
- Go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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.