Hyundai i20 Quiz
Body Electrical System

Smart Key System Diagnosis Repair Procedures

In this manual: Body Electrical System
General Information — 17Engine Mechanical System — 79Engine Electrical System — 50Emission Control System — 22Engine/Fuel Control System — 107Clutch System — 27MANUAL TRANSMISSION SYSTEM — 21Drive Shaft and Axle — 18Suspension System — 29Steering System — 21Restraint — 41Braking System — 53Body Work (Interior and Exterior) — 190Body Electrical System — 181Heating, Ventilation and Air Conditioning — 58
44steps
~264min
4/5difficulty
Done 0 of 44

Inspection

Self-Diagnosis Using GDS. Smart Key system malfunctions can be quickly diagnosed using GDS. GDS quickly operates the actuators for input/output value control and performs self-diagnosis. The following three items are critical problems in the SMART KEY system.
  1. SMART KEY Device Input Problem.
  2. SMART KEY Device Problem.
  3. SMART KEY Device Output Problem.
  4. SMART KEY Device Input Problem: Switch Diagnosis
  5. SMART KEY Device Problem: Communication Diagnosis
  6. SMART KEY Device Output Problem: Antenna Diagnosis and Switch Output
  7. Connect the GDS cable to the data link connector in the lower driver-side crash pad cover, GDS plug.
  8. Select the vehicle model and the SMART KEY system.
  9. Select "SMART KEY Device".
  10. After ALL ON, select "Current Data".
  11. You can view the status of each switch on the scan tool after connecting the "Current Data" process.
    Display Description
    Front Left Rocker Switch ON: The button on the door side handle is turned on. Driver.
    Front Right Rocker Switch ON: The button on the door side handle is turned on. Passenger.
    INTERIOR CHEST ON: The external line button is turned on.
    P Position Factor ON: The shift lever is in the P position.
    ALL 1 ON: The ALL switch is in the ALL position.
    SOUND ON: The ALL switch is in the ACC position.
    Push Button Switch ON: Push button switch ON.
    Exterior Buzzer ON: Buzzer ON.
  12. Communication Diagnosis checks whether each connected component is operating normally.
  13. Connect the GDS cable to the data link connector in the lower driver-side crash pad cover to prevent collisions from the driver's side.
  14. After ALL ON, select "DTC".
  15. Connect the GDS cable to the data link connector in the lower driver-side crash pad cover to prevent collisions from the driver's side.
  16. After ALL ON, select "ACTIVATION TEST".
  17. If the smart key LED blinks, the smart key is normal.
  18. If the Smart Key LED does not blink, check the voltage of the Smart Key battery.
  19. Antenna Activation
    • Antenna No. 1 INTERIOR
    • Antenna No. 2 INTERIOR
    • Trunk Antenna
    • BUMPER/Antenna
    • DRIVER DOOR Antenna
    • PASSENGER DOOR Antenna
  20. Connect the GDS cable to the data link connector in the lower driver-side crash pad cover to prevent collisions from the driver's side.
  21. Select "Antenna Status Check".
  22. After ALL ON, select "Antenna Status Check".
  23. Place the Smart Key near the corresponding antenna and use with GDS.
  24. If the Smart Key operates normally, the corresponding antenna, Smart Key (transmission, reception) and external receiver are normal.
  25. Antenna Status
    • Antenna No. 1 INTERIOR
    • Antenna No. 2 INTERIOR
    • Trunk Antenna
    • BUMPER/Antenna
    • DRIVER DOOR Antenna
    • PASSENGER DOOR Antenna
  26. Connect the GDS cable to the data link connector in the lower driver-side crash pad cover to prevent collisions from the driver's side.
  27. Select "Serial Communication Line Control".
  28. Check the serial communication line using the GDS.
  29. If the receiver communication line operates normally, perform "ESCL Line Communication Control".
  30. If the Smart Key operates normally, communication with the Smart Key device, external receiver and ESCL is normal.
  31. If the electronic key does not operate correctly, check the following items.
    • Open circuit or no response from the external receiver communication line.
    • Short to ground of the external receiver communication line.
    • Open circuit in ESCL or no response.
    • Short to ground in ESCL.
  32. Place the Smart Key in the following coverage area and check ALL ON.
  33. If the ignition is on, the antenna operates normally.
  34. Check the ignition mode of the room antenna.
  35. Place the Smart Key in the following coverage area and activate the antenna. Make sure the Smart Key LED blinks.
  36. If the Smart Key LED does not blink, check the antenna in the coverage area.
  37. Connect the GDS cable to the data link connector in the lower driver-side crash pad cover to prevent collisions from the driver's side.
  38. After ALL ON, select "FOB KEY STATUS INFO".
  39. Connect the GDS cable to the data link connector in the lower driver-side crash pad cover to prevent collisions from the driver's side.
  40. After ALL ON, select "SMK STATUS INFO".
  41. Connect the GDS cable to the data link connector in the lower driver-side crash pad cover to prevent collisions from the driver's side.
  42. After ALL ON, select "ESCL STATUS INFO".
  43. Connect the GDS cable to the data link connector in the lower driver-side crash pad cover to prevent collisions from the driver's side.
  44. After ALL ON, select "Override Mode".
The following three diagnostic solutions are the main solutions for most problems. Switch Diagnosis; Communication Diagnosis Using GDS (Automatic Diagnosis); Antenna Activation Diagnosis; Antenna Status Check; Serial Communication Status Check; Room Antenna Activation Control; FOB Status Check; Smart Key Status Check; ESCL Status Check; Neutral Status Control; Input Switch List
NO ITEM NAME UNIT
1 SSB Switch 2 -
2 SOUND -
3 ALL1 -
4 "P" Position Factor -
5 With Brake Switch -
6 AVG Door Lock Switch -
7 Front Door Lock Switch -
8 TRUNK LID SWITCH -
9 Battery Voltage -
10 CHARGING VOLTAGE -
11 Key Out Indicator -
12 IMMOBILIZER LIGHT -
13 Exterior Buzzer -
14 ESCL Activation -

Actuator List
NO ITEM NAME Condition
1 Immobilizer Indicator Ignition Switch ON
Engine Stopped
2 Exterior Buzzer Ignition Switch ON
Engine Stopped
3 Interior Antenna No. 1 Active Ignition Switch ON
Engine Stopped
4 Interior Antenna No. 2 Active Ignition Switch ON
Engine Stopped
5 Trunk Antenna Active Ignition Switch ON
Engine Stopped
6 Bumper Antenna Active Ignition Switch ON
Engine Stopped
7 DRV_DR Antenna Active Ignition Switch ON
Engine Stopped
8 AST_DR Antenna Active Ignition Switch ON
Engine Stopped

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