steering drift

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• Some Hyundai vehicles equipped with MDPS steering assist may exhibit a mild steering drift under normal driving conditions.

• If the vehicle exhibits this condition, remove the MDPS fuse to eliminate the steering assist and to diagnose this condition. The MDPS fuse is located in the Engine Room Junction Box.

Note: This procedure may set DTCs in the EPS and ESC systems. These codes must be cleared before other operations are performed.

• If the condition is no longer present, the Absolute Steering Position (ASP) Calibration must be performed.

• If the Vehicle continues to drift in either direction, refer to TSB 08-SS-004.

Steering Drift

Elantra (FD) Elantra (HD)

Steering Drift

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Sonata (YF) Tucson (LM)

MDPS FuseRemove fuse from Junction Box to perform diagnosis.

Engine Room Junction Box MDPS Fuse Location: (Elantra shown)

Steering Drift

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If ASP is not calibrated after a component is replaced with aUSED part.• Motor assist will be available and the

warning lamp will not blink and active return will not operate.

If ASP calibration is performed incorrectly.• The vehicle may set code C1259, but the

warning lamp will not illuminate. Motorassist will be available but active returnwill not operate.

The Absolute Steering Position (ASP) must be Recalibrated whenever:• A Wheel Alignment is Performed• The MDPS is replaced• The MDPS Control module is replaced

If ASP is not calibrated after a component is replaced with a NEW part• Motor assist will be available, but the

warning lamp will blink and active returnwill not occur.

Steering Drift

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Note: All repairs must also be performed prior to this procedure.Note: All repairs must also be performed prior to this procedure.

Steering Drift

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DTC’s set because of the loss of battery voltage to the MDPS module.

DTC’s set because of the loss of battery voltage to the MDPS module.

Both ESC and EPS modules must be checked for codes prior to Re-Calibration using the GDS, EPS Current Data.

Check for codes in the ESC and EPS Modules

From EPS Current Data, Monitor present Steering Angle Sensor position with the steering wheel in the Straight-Ahead position.

Monitor Steering Angle in Straight-Ahead Position

Steering Drift

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This reading should be <±5°!

This current data illustrates a misadjusted steering angle sensor.

1° or less

± 5° or less

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Follow GDS Calibration instructions and then note the following current data.

ASP Calibration

Note: Refer to Fix It Right “SAS Calibration” for number of Steering Angle Sensors and production dates.

Steering Drift

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Using GDS, Navigate to ID R egister screen and sele ct ASP

Calibrati on.

Using GDS, Navigate to ID Register screen and sele ct ASP

Calibration.

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Follow ALL On-ScreenInstructions to PerformCalibration Procedure.


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Steering Drift

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Steering Drift

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5 6Follow ALL On-ScreenInstructions to PerformCalibration Procedure.


Steering Drift

When calibration is complete, recheck GDS Current Data. Steering Angle Sensor should display 0° after Recalibration.

Recheck GDS Current Data

Steering Drift

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Correctly calibrated

Steering Angle sensor.

Correctly calibrated

Steering Angle sensor.

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Right LockRight Lock

Left LockLeft Lock

Steering Angle Total degrees

Steering Drift

BEFORE CALIBRATION

• Monitor Left Lock and Right Lock total degrees, before and after calibration.

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Steering Drift


Left LockLeft Lock

AFTER CALIBRATION


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Steering Drift


Left LockLeft Lock

AFTER CALIBRATION


518.4°-511.7°

+6.7°

Left Lock andRight Lock arewithin range:

6.7° < 15° maximum.

518.4°-511.7°

+6.7°

Left Lock andRight Lock arewithin range:

6.7° < 15° maximum.

steering drift

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