General Inspection

Perform troubleshooting before or after servicing the EPS system. The inspection procedure is as follows. Compare the system condition with the normal condition in the table below, and if an abnormal symptom is found, take the necessary action. and inspection.

Test Conditions	Normal condition: The motor should not provide steering assist.
	Symptom	Possible Cause	Remedy
Ignition OFF	The motor provides steering assist.	ASP is not calibrated.	Perform ASP calibration using the scan tool.
		IG Power Supply Circuits	Inspect the IG power supply line.

Test Conditions	Normal condition: The motor should not assist steering, and the warning lamp is illuminated.
	Symptom	Possible Cause	Remedy
IG ON / Engine OFF	The motor provides steering assist.	ASP is not calibrated.	Perform ASP calibration using the scan tool.
		EMS CAN signal not received.	Inspect the CAN line.
	The warning lamp does not illuminate.	Cluster Malfunction	Inspect the cluster and cluster harness.

Test Conditions	Normal condition: The electric motor provides steering assist, and the warning lamp does not illuminate.
	Symptom	Possible Cause	Remedy
IG ON / Engine ON	The warning lamp is illuminated, and the motor does not assist steering.	EPS (Battery Power) and IG Power Supply Malfunction	Inspect the connector and harness for the EPS (constant hot) and the IG power supply line.
		DTC is detected by the system.	Perform a self-diagnosis using a scan tool, and repair or replace as necessary.
	The warning lamp illuminates, and the motor provides steering assist.	ASP is not calibrated.	Perform ASP calibration using the scan tool.
		CAN communication error between EPS and cluster.	Inspect the CAN line.

ASP: Absolute Steering Position, CAN: Controller Area Network, EMS: Engine Management SystemUse caution when performing ASP (Absolute Steering Position) calibration or EPS type recognition.

• Before ASP calibration or EPS type recognition.
• Be careful not to disconnect the cables connected to the vehicle or the scan tool during ASP calibration or EPS type recognition.
• When ASP calibration or EPS Type Recognition is completed, turn the ignition off, wait a few seconds, then start the engine to confirm normal vehicle operation.

ASP Calibration

1. 1
   Select "Steering Wheel Angle Sensor".
2. 2
   Continue the test in accordance with the instructions on the screen.

   

   

3. 3
   Select "EPS Variant Coding".
4. 4
   Continue the test in accordance with the instructions on the screen.

   

   

EPS Type Recognition Procedure