| TUCSON(LM) >2011 > G 2.0 DOHC > Steering System > 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 condition | Normal condition: Motor must not supply steering assist.
Symptom | Possible cause | Remedy
IG Off | Motor supplies steering assist. | ASP is not calibrated. | Perform the ASP calibration using a scan tool.
IG power supplies | Inspect the IG power supply line.
Test condition | Normal condition: Motor must not supply steering assist, Warning lamp is illuminated.
Symptom | Possible cause | Remedy
IG On/Engine Off | Motor supplies steering assist. | ASP is not calibrated. | Perform the ASP calibration using a scan tool.
EMS CAN signal is not received. | Inspect the CAN line.
Warning lamp is not illuminated. | Cluster fault | Inspect the cluster and cluster harness
Test condition | Normal condition: Motor supplies steering assist, Warning lamp is not illuminated.
Symptom | Possible cause | Remedy
IG On/Engine On | Warning lamp is illuminated and Motor dose not supply steering assist. | EPS (Hot at all times) and IG power supply fault | Inspect the connector and harness for EPS (Hot at all times) and IG power supply line.
DTC is detected by system. | Perform the self test using a scan tool and repair or replace.
Warning lamp is illuminated and Motor supplies steering assist. | ASP is not calibrated. | Perform the ASP calibration using a scan tool.
CAN communication between EPS and cluster is fault. | Inspect the CAN line.
ASP: Absolute Steering Position CAN: Controller Area Network EMS: Engine Management System
The following symptoms may be occurred during normal vehicle operation and if there is no EPS warning light illumination, it is not malfunction of EPS system.
• | After turning the ignition switch on, the steering wheel becomes heavier while it performs EPS system diagnostics, for about 2 seconds, then it becomes normal steering condition.
• | After turning the ignition switch on or off, EPS relay noise may occur but it is normal.
• | When it is steered, while the vehicle is stopped or in low driving speed, motor noise may occur but it is normal operating one.
Caution when 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.
Scan tool (Hi-Scan Pro) installation
1. | Attach the CAN interface module to the Hi-Scan Pro main body and securely tighten the two bolts.
2. | Install the CAN interface module to the Data Link Cable and securely tighten the two bolts.
ASP calibration procedure
1. | Plug DLC cable from a scan tool into the vehicle's data link connector located under the instrument panel on the driver's side.
2. | Turn the ignition switch ON position.
3. | Turn the steering wheel so that the front wheel can face straight ahead.
4. | Select a model and ELECTRIC POWER STEERING.
5. | Select the ASP CALIBRATION and press ENTER.
6. | Check the massage on the screen and press ENTER'.
7. | Confirm the vehicle condition (IG On) and then turn the steering wheel until massage changes to the next screen.
8. | When the massage is displayed on the screen as follows, turn the steering wheel so that the front wheel can face straight ahead and then press ENTER.
9. | When the calibration is completed, the massage will be displayed on the screen as follows.
EPS type recognition procedure
1. | Plug DLC cable from a scan tool into the vehicle's data link connector located under the instrument panel on the driver's side.
2. | Turn the ignition switch ON position.
3. | Select a model and ELECTRIC POWER STEERING.
4. | Select the EPS type recognition and press ENTER.
5. | Select the affected area and press ENTER.
6. | When the EPS type recognition is completed, the massage will be displayed on the screen as follows.