Hyundai Elantra: Electric Power Steering / Repair procedures

General Inspection
After or before servicing the EPS system, perform the troubleshooting and test procedure as follows. Compare the system condition with normal condition in the table below and if abnormal symptom is detected, perform necessary remedy and inspection.
Test Conditions
Symptoms
Assist
Time
Warning light
Cause
Inspection Item
IG ON/ Engine ON/ Stationary>IG OFF/ Engine OFF/ Stationary
Steering assist failure
-
-
-
Normal
Steering assist working
120 seconds
Light is on
IG power is supplied even when the IG is switched off.
Steering angle is not initialized
Check IG power line
Use a scan tool to initialize steering angle
Light is off
IG power is supplied even when the IG is switched off.
Steering angle is not initialized  &Failure in cluster.
Check cluster wiring line
Check Ignition power line
Use a scan tool to initialize steering angle
70 seconds
Light is on
CAN BUS OFF or No EMS signals received
Check CAN communication line
Light is off
(CAN BUS OFF or No EMS signals received ) & Failure in cluster
Check CAN communication line
Check cluster wiring line.
IG ON/ Engine OFF/ Stationary
-
Steering assist failure
-
-
-
-
Steering assist working
Duration
Light is on
CAN BUS OFF or No EMS signals received
Check CAN communication line
Light is off
(CAN BUS OFF or No EMS signals received) & Failure in cluster
Check CAN communication line
Check cluster wiring line
When engine is turned on, IG stays at On, but engine goes off
Duration
Light is on
CAN BUS OFF or EMS signals received
Check CAN communication line
120 seconds
Light is off
-
Normal
IG ON/ Engine ON/ Stationary
Steering assist failure
-
Lght is on
Faults in power supply of EPS system and Ignition
Check the power lines of EPS system and Ignition
-
Lght is on
Diagnostic trouble code (DTC) appears
Use scanner to diagnose and troubleshoot
Steering assist working
-
-
-
Normal
-
Lght is on
Diagnostic trouble code (DTC) appears
Use scanner to diagnose and troubleshoot

IG : Ignition
ASP : Absolute Steering Position
CAN : Controller Area Network
EMS : Engine Management System
ASP (Absolute Steering Position) calibration or EPS type recognition
   
Check if the battery is fully charged before ASP calibration or EPS type recognition.
Be careful not to disconnect any cables connected to the vehicle or scan tool during ASP calibration or EPS type recognition.
When the ASP calibration or EPS type recognition is completed, turn the ignition switch off and wait for several seconds, then start the engine to confirm normal operation of the vehicle.
ASP Calibration
1.
Connect self-diagnosis connector(16pins) located in the lower of driver side crash pad to self-diagnosis device.
2.
Turn the self-diagnosis device after key is ON.
3.
After Selecting the "vehicle model" and "system", select the "ASP Calibration" on GDS vehicle selection screen.

EPS Type Recognition
1.
Connect self-diagnosis connector(16pins) located in the lower of driver side crash pad to self-diagnosis device.
2.
Turn the self-diagnosis device after key is ON.
3.
After Selecting the "vehicle model" and "system", select the "EPS Type Recognition" on GDS vehicle selection screen.

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