19-ST-001H

GROUP
STEERING
Technical Service Bulletin
SUBJECT:
DATE
APRIL, 2019
NUMBER
19-ST-001H
MODEL(S)
See Below
COLUMN-MOUNTED MDPS REPAIR INFORMATION
THIS TSB SUPERSEDES 18-ST-002-1 TO UPDATE APPLICABLE MODELS LIST (ADDED AE,
OS, JS, PD) AND INCLUDE DIAGNOSTIC FLOWCHART AND DTC TABLE.
Description: This bulletin provides information regarding replacement of the column-mounted Motor
Driven Power Steering (MDPS) system as separate components.
Applicable Vehicles: Veloster (FS/JS), Elantra GT (GD/PD), Elantra Coupe (JK), Elantra
(MD/UD/AD), Sonata (YF/LF), Sonata Hybrid/Plug-In (YF HEV/ LF HEV/LF PHEV), Ioniq Hybrid/PlugIn/Electric Vehicle (AE HEV/AE PHEV/AE EV), Azera (HG), Santa Fe (NC), Accent (RB), Tucson
(LM/TL), Santa Fe Sport (AN), Tucson Fuel Cell (LM FCEV), Kona (OS), Kona EV (OS EV).
NOTICE

Refer to the applicable model shop manual for the detailed diagnostic and repair
service procedures.
Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair
SUBJECT:
MDPS MOTOR AND ECU REPLACEMENT INFORMATION
Parts Information:
Partial parts of MDPS
1
2
4
5
3
1. Column & Shaft Assembly (MDPS full assembly)
2. Column & Housing Assembly
3. MDPS Motor
4. MDPS ECU
5. Universal Joint Assembly
NOTICE

Refer to the applicable parts catalog for specific application part numbers.
Grease for Mando Systems
Remarks
For Mando MDPS systems only:
Santa Fe Sport (AN)
Accent (RB)
Tucson (LM/TL)
Tucson Fuel Cell (LM FCEV)
Veloster (JS)
The proper amount of grease is
equivalent to a 50mm bead.
Part Number: YSBB0-91105-FFF
TSB #: 19-ST-001H
*Each tube of grease can be used
on approximately 15 vehicles.
Page 2 of 5
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SUBJECT:
MDPS MOTOR AND ECU REPLACEMENT INFORMATION
Warranty Information:
MODEL
OPERATION
56330R00
MDPS (EPS) Motor
56330*
56345R00
MDPS-ECU Assy
56340* /
56345*
See
Applicable
Steering Column Shaft
56300R0S
Vehicles
Assembly (MDPS)
list on
Steering Column & Housing
page 1 56390R00
Assy (C-MDPS)
56400R00
Joint And/Or Coupling AssyUniversal
OP TIME
CAUSAL
PART
OP CODE
Please see
WEB LTS for
current LTS
time.
56310*
NATURE CAUSE
CODE
CODE
I11
ZZ3
56390*
56400*
NOTE: Dealers may claim $0.10 on sublet for reimbursement of grease.
* Refer to applicable parts catalog for full causal part numbers.
Service Procedure:
NOTICE





In cases of no DTC(s) with symptoms of binding/sticking steering feel, it is
recommended to replace the column & housing assembly.
MDPS Repair Flowchart is meant to be used as reference guide only. See MDPS
DTC table for more details.
If an MDPS component is replaced, but the concern is not resolved, please
contact the Hyundai Technical Assistance Hotline at 1-800-325-6604 for further
assistance.
Note that some DTCs may be found in systems other than EPS (electric power
steering) in GDS. They may be found in the Brake/ABS/ESC system. Check all
systems for DTCs.
Always refer to the applicable model shop manual for detailed information
regarding DTC diagnosis and component replacement procedures.
TSB #: 19-ST-001H
Page 3 of 5
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SUBJECT:
MDPS MOTOR AND ECU REPLACEMENT INFORMATION
MDPS Repair Flowchart
Vehicle in dealer for MDPS-related
complaint.
Noise – Refer to shop
manual for common
MDPS noise repairs.
Warning Lamp Illuminated – DTC(s)
present / CAN Line Error
No DTC(s), Sticking /
Binding – Replace column
& housing assy.
1. Check MDPS connectors and
wiring.
2. Erase DTC(s) and re-check.
3. If DTC(s) still present, follow
these recommended repairs.
ECU-Related
C1112
C1604
C1623
C1687
C1688
C1704
C1705
C2412
C2413
Motor-Related
C2400
C2401
Replace the
MDPS ECU.
Replace the
MDPS motor.
Column & HousingRelated
C1259
C1290
Connectors / Wiring Related
C1260, C1261, C1611, C1612, C1616,
C1622, C1628, C1646, C1656, C1692,
C1693, C1696, C1697
Replace the
column &
housing assy.
Check DTC(s) and Wiring at
HECU / MDPS / EMS
• Check connectors for
poor connection.
• Check for connector
corrosion.
• Check for connector
damage or deformation.
• Check the DTC
Diagnostic Guide on
HyundaiTechInfo.com
TSB #: 19-ST-001H
Page 4 of 5
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SUBJECT:
MDPS MOTOR AND ECU REPLACEMENT INFORMATION
MDPS DTC Table
DTC
Issue
First Inspection Method
C1102
Battery voltage problem
C1603
MDPS thermal protection
C1611
C1616
CAN time out EMS
CAN BUS OFF
C1622
Vehicle speed signal error
Check battery voltage condition.
Investigate driving conditions
DTC is set. This DTC protects
motor from overheating.
1. Check GDS condition.
2. Check wiring and
connector condition.
3. Check ECU CAN line.
4. Check MDPS ground.
Check SPAS and associated
wiring.
Check TCU and associated
wiring.
Check instrument cluster and
associated wiring.
Check VSM and associated
wiring.
Reset steering angle sensor
calibration and erase DTC(s).
Check wiring and connector
condition.
Reset steering angle sensor
calibration.
First erase DTC, then check
wiring and connector condition.
Check wiring and connector
condition between torque sensor
and ECU.
C1696,
C1697
C1612,
C1646
C1628,
C1656
C1692,
C1693
SPAS signal error
TCU signal error
Instrument cluster signal error
VSM signal error
C1259
Steering angle sensor signal error
C1260
C1261
Steering angle sensor signal error
Zero-setting error
C1290
Torque sensor signal error
C1112
Torque sensor voltage error
C1704
C1705
C1604
C2413
C2400
C2401
ECU fail-safe relay fault
ECU hardware error
ECU over/discharge error
ECU hardware error
Motor signal error
Motor circuit error
First erase DTC, then check
wiring and connector at ECU.
C2412
Motor voltage supply error
First erase DTC, check wiring
and connector between ECU
and motor.
C1623
C1687
CAN time out SAS
CAN time out VSM
C1688
VSM signal error
Repair Recommendations
Recharge battery voltage.
No replacement necessary.
Check EMS CAN line.
Check the chassis CAN line.
Check the EMS (Engine ECU).
Repair as necessary.
Erase DTC(s).
MDPS assembly is not to be
replaced.
If DTC returns, replace column &
housing assembly.
If DTC returns, inspect wiring and
connector condition.
If DTC returns, replace column &
housing assembly.
If DTC returns, replace MDPS ECU.
1. Check MDPS power
connector and fuse.
2. Check MDPS ground line.
3. Check MDPS ECU / VSM
CAN line.
4. Communication status with
GDS.
5. Check for C1259 -> if present
with these DTCs, replace
column and housing assembly.
TSB #: 19-ST-001H
If DTC returns, replace MDPS
motor.
First replace MDPS ECU.
If DTC returns, replace MDPS
motor.
If DTC returns, replace MDPS ECU.

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 5
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