Steering Angle Sensor
Signal Error

C1261

Zero-Setting Error

C1290

Torque Sensor Error

C1112

Torque Sensor Voltage Error

C1704

ECU Fail-Safe Relay Fault

C1705

ECU Hardware Error

C1604

ECU Over/Discharge Error

C2413

ECU Hardware Error

C2400

Motor Signal Error

C2401

Motor Circuit Error

C2412

Motor Voltage Supply Error

C1623
C1687

C1688

Inspection Procedure

Recommendation

Check battery voltage condition.

Recharge battery voltage.

Investigate driving conditions if DTC
is set. This DTC protects the motor
from overheating.

No replacement necessary.

Check GDS condition.
Check wiring and connector condition.
Check ECU CAN line.
Check MDPS ground.

Check EMS Can line.
Check the chassis CAN line.
Check the EMS

Check SPAS and associated wiring.
Repair as necessary.
Erase DTC(s).
MDPS Assy is not to be replaced.

Reset steering angle sensor calibration
and erase DTC(s).
Check wiring and connector condition.

If DTC returns, replace column
and housing assembly.

Reset steering angle sensor calibration.

If DTC returns, inspect wiring and
connector condition.

First, erase DTC, then check wiring
And connector condition.

If DTC returns, replace column
And housing assembly.

Check wiring and connector condition
Between torque sensor and ECU.
If DTC returns, replace the
MDPS ECU.
First, erase DTC.
Then check the wiring and connector
at the ECU.
If DTC returns, replace the
MDPS motor.
First, erase DTC.
Then check the wiring and connector
between the ECU and motor.

First replace MDPS ECU.
If DTC returns, replace the
MDPS motor.

CAN Time Out SAS

1.

CAN Time Out VSM

2.
3.
4.

If DTC returns, replace the
MDPS ECU.

VSM Signal Error

5.

Check MDPS power connector
and fuse.
Check MDPS ground line.
Check MDPS ECU/VSM CAN line.
Check communication status
with GDS.
Check for DTC C1259.
If present, replace the column and
housing assembly.

TSB: CHA084 (Rev 4) Multiple Models November 2018

If DTC returns and MDPS is
inoperable, replace MDPS ECU.
If DTC returns and MDPS
operation is normal, continue
investigation into wiring issues.

Page 5 of 6
SUBJECT:

REPLACEMENT OF C-MDPS MOTOR, ECU AND/OR
STEERING COLUMN HOUSING

Replacement Procedure for MDPS Motor:
1. Replace the MDPS motor by referring to
the “Steering System → Motor Driven
Power Steering → MDPS Motor →
Repair Procedures” chapter in the
applicable Shop Manual on KGIS.

Replacement Procedure for MDPS ECU:
1. Replace the MDPS ECU by referring to
the “Steering System → Motor Driven
Power Steering → MDPS ECU → Repair
Procedures” chapter in the applicable
Shop Manual on KGIS.

Replacement Procedure for Steering Column & Housing:
1. Replace the MDPS column and housing
by referring to the “Steering System →
Motor Driven Power Steering → MDPS
Column and Housing → Repair
Procedures” chapter in the applicable
Shop Manual on KGIS.

 IMPORTANT
Ensure all steps are closely followed within the Service information as additional
KDS-related procedures are required. Ensure the Steering Angle Sensor (SAS) is
calibrated and there are no DTCs after replacement of the MDPS Motor and/or
ECU. Verify proper operation of the steering system and vehicle.
TSB: CHA084 (Rev 4) Multiple Models November 2018

Page 6 of 6

REPLACEMENT OF C-MDPS MOTOR, ECU AND/OR
STEERING COLUMN HOUSING

SUBJECT:

AFFECTED VEHICLE RANGE:
Model

MDPS Supplier

Soul (AM)
Optima (QF, TF, TF HEV)
Cadenza (VG)
Forte (YD, YDm)

Mobis (Old)

Forte (BD, BDm, YD, YDm)
Niro (DE, DE HEV/PHEV/EV)
Optima (JF/JFa, JF HEV/PHEV)
Soul (PS, PS EV)
Sorento (UMa)
Cadenza (YG)

Mobis (New)

Rio (UB, SC)
Sportage (SL, QL)
Sorento (XMa)

Mando

Model Year Range

All Applicable Models
2010MY~
with C-MDPS

REQUIRED PART:
Part Name

Part Number

C-MDPS Motor

Refer to EPC

C-MDPS ECU

Refer to EPC

Steering Column Housing

Refer to EPC

Figure

WARRANTY INFORMATION:
N Code: D61 C Code: ZZ4
Model

Claim
Type

Causal
P/N

Qty.

Refer to
EPC
All
Models
Listed

W

Refer to
EPC

Refer to
EPC

1

Repair
Description

Labor
Op Code

Op
Time

C-MDPS Motor
Replacement

56330R00
56331R00

Refer
to
LTS

C-MDPS ECU
Replacement

56345R00

Refer
to
LTS

Steering Column
Housing Replacement

56391R00

Refer
to
LTS

TSB: CHA084 (Rev 4) Multiple Models November 2018

Replacement
P/N

Qty.

N/A

0