Steering Drift
Steering Drift
Sonata (YF)
Elantra (FD)
Elantra (HD)
Tucson (LM)
1
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.
1
Steering Drift
Engine Room Junction Box MDPS Fuse Location: (Elantra shown)
MDPS Fuse Remove fuse from Junction Box to perform diagnosis.
2
Steering Drift
2 The Absolute Steering Position (ASP) must be Recalibrated whenever: If ASP is not calibrated after a component is replaced with a USED part.
Motor assist will be available and the warning lamp will not blink and active return will not operate.
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
If ASP calibration is performed incorrectly.
The vehicle may set code C1259, but the warning lamp will not illuminate. Motor assist will be available but active return will not operate.
Motor assist will be available, but the
warning lamp will blink and active return will not occur.
Steering Drift
Check for codes in the ESC and EPS Modules Both ESC and EPS modules must be checked for codes prior to Re-Calibration using the GDS, EPS Current Data.
Note: All repairs must also be performed prior to this procedure. Note: All repairs must also be performed prior to this procedure.
DTCs set DTCs set because of the because of the loss of battery loss of battery voltage to the voltage to the MDPS module. MDPS module.
Steering Drift
Monitor Steering Angle in Straight-Ahead Position From EPS Current Data, Monitor present Steering Angle Sensor position with the steering wheel in the Straight-Ahead position.
1 or less
This current data illustrates a misadjusted steering angle sensor.
5 or less
This reading should be <5!
5
Steering Drift
3 ASP Calibration
Using GDS, Using GDS, Navigate to ID Register Navigate to ID Register screen and select ASP screen and select ASP Calibration. Calibration. Follow GDS Calibration instructions and then note the following current data.
Note: Refer to Fix It Right SAS Calibration for number of Steering Angle Sensors and production dates.
Steering Drift
Follow ALL On-Screen Follow ALL On-Screen Instructions to Perform Instructions to Perform Calibration Procedure. Calibration Procedure.
1 2
Steering Drift
3
Follow ALL On-Screen Follow ALL On-Screen Instructions to Perform Instructions to Perform Calibration Procedure. Calibration Procedure.
Steering Drift
Follow ALL On-Screen Follow ALL On-Screen Instructions to Perform Instructions to Perform Calibration Procedure. Calibration Procedure.
Steering Drift
Recheck GDS Current Data When calibration is complete, recheck GDS Current Data. Steering Angle Sensor should display 0 after Recalibration.
Correctly Correctly calibrated calibrated Steering Angle Steering Angle sensor. sensor.
10
Steering Drift
Steering Angle Total degrees
Monitor Left Lock and Right Lock total degrees, before and after calibration.
BEFORE CALIBRATION
Right Lock Right Lock
Left Lock Left Lock
11
Steering Drift
Steering Angle Total degrees
Monitor Left Lock and Right Lock total degrees, before and after calibration.
AFTER CALIBRATION
Right Lock Right Lock
Left Lock Left Lock
12
Steering Drift
Steering Angle Total degrees
Monitor Left Lock and Right Lock total degrees, before and after calibration.
AFTER CALIBRATION
Right Lock Right Lock
518.4 518.4 -511.7 -511.7 +6.7 +6.7 Left Lock and Left Lock and Right Lock are Right Lock are within range: within range: 6.7 < 15 maximum. 6.7 < 15 maximum.
Left Lock Left Lock
13
