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 MANUALSHYUNDAI2013EQUUS ULTIMATEREPAIR AND DIAGNOSIS (SINGLE PAGE)BODY & FRAMEDOOR LOCKSSMART KEY SYSTEMSMART KEY SYSTEMREPAIR PROCEDURESINSPECTIONSERIAL COMMUNICATION STATUS CHECK

2013 Hyundai Equus Ultimate

Serial Communication Status Check

2013 Hyundai Equus UltimateSECTION Serial Communication Status Check

Connect the cable of GDS to the data link connector in driver side crash pad lower panel.
Select the SERIAL COMMUNICATION STATUS CHECK".

Fig 1: Display - Serial Communication Status Check Screen
Courtesy of HYUNDAI MOTOR AMERICA
After IG ON, select the "External serial line".

Fig 2: Display - Serial Communication Line Check Screen
Courtesy of HYUNDAI MOTOR AMERICA
Check the serial communication line with a scanner.

Fig 3: Display - Receiver Communication Line Check Screen
Courtesy of HYUNDAI MOTOR AMERICA
If the smart key runs normal, the communication of IPM, exterior receiver and ESCL (Electronic Steering column Lock) are normal.

Fig 4: Display - ESCL Communication Line Check Screen
Courtesy of HYUNDAI MOTOR AMERICA
If the smart key runs abnormal, check the following items.
1. Disconnection or no response of the exterior receiver communication line.
2. The exterior receiver communication line disconnection and ground connection.
3. The ESCL disconnection or no response
4. The ESCL disconnection and ground connection

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.