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Connect the cable of GDS to the data link connector in driver side crash pad lower panel.
Select the "Serial Communication Line Check".

Fig 1: Scantool Display - ID Register
Courtesy of HYUNDAI MOTOR AMERICA
After IGN ON, select the "Receiver Communication Line Check".

Fig 2: Scantool Display - Receiver Communication Line Check
Courtesy of HYUNDAI MOTOR AMERICA
Check the serial communication line with a GDS.
If the receiver communication line runs normal, check the "ESCL Communication Line Check".

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

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.

Safety Warning

Serial Communication Status Check