GROUP
STEERING

Technical Service Bulletin
SUBJECT:

DATE
JANUARY, 2020

NUMBER
20-ST-001H
MODEL(S)
See Below

COLUMN-MOUNTED MDPS REPAIR INFORMATION

THIS TSB SUPERSEDES 19-ST-001H TO INCLUDE NEW MODELS AND COLUMN & HOUSING
ASSY NOISE REPAIR RECOMMENDATION.
Description: This bulletin provides information regarding replacement of the column-mounted Motor
Driven Power Steering (MDPS) system as separate components.

Applicable Vehicles: Accent (RB/HC), Azera (HG), Elantra (MD/UD/AD), Elantra Coupe (JK),
Elantra GT (GD/PD), Ioniq Hybrid/Plug-In/Electric Vehicle (AE HEV/AE PHEV/AE EV),
Kona (OS), Kona EV (OS EV), Palisade (LX2), Santa Fe (TMA), Santa Fe/XL (NC),
Santa Fe Sport (AN), Sonata (YF/LF), Sonata Hybrid/Plug-In (YF HEV/ LF HEV/LF PHEV),
Tucson (LM/TL), Tucson Fuel Cell (LM FCEV), Veloster (FS/JS)

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 System

1

2

4

6
3

5

1. Column & Shaft Assembly (MDPS full assembly)
2. Column & Housing Assembly
3. MDPS Motor
4. MDPS ECU
5. Universal Joint Assembly
6. Electric Power Pack (MDPS Motor and MDPS ECU assembly. Applicable to Palisade (LX2)
and Santa Fe (TMa).

NOTICE


Refer to the applicable parts catalog for specific application part numbers.
Grease for Mando Systems

Remarks
For Mando MDPS vehicles below:
Santa Fe Sport (AN)
Accent (RB/HC)
Tucson (LM/TL)
Tucson Fuel Cell (LM FCEV)
The proper amount of grease is
equivalent to a 50mm bead.
*Each tube of grease can be used
on approximately 15 vehicles.

Part Number: YSBB0-91105-FFF
TSB #: 20-ST-001H

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SUBJECT:

MDPS MOTOR AND ECU REPLACEMENT INFORMATION

Warranty Information:
MODEL

OP CODE OPERATION

OP TIME

CAUSAL NATURE CAUSE
PART
CODE
CODE

Accent (RB/HC)
Azera (HG)
Elantra (MD/UD/AD)
Elantra Coupe (JK)
Elantra GT (GD/PD)
Ioniq (AE HEV/PHEV/EV)
Kona (OS/OS EV)
Santa Fe / XL (NC)
MDPS (EPS)
56330R00
Santa Fe Sport (AN)
Motor
Sonata (YF/LF)
Sonata Hybrid (YF HEV/LF
HEV/LF PHEV)
Tucson (LM/TL)
Tucson Fuel Cell (LM
FCEV)
Veloster (FS/JS)

Please see
WEB LTS for
current LTS
time

56330*

I11

ZZ3

Accent (RB/HC)
Elantra (MD/UD/AD)
Elantra Coupe (JK)
Elantra GT (GD/PD)
Ioniq (AE HEV/PHEV/EV)
Kona (OS/OS EV)
Santa Fe / XL (NC)
Santa Fe Sport (AN)
56345R00
Sonata (YF/LF)
Sonata Hybrid (YF HEV/LF
HEV/LF PHEV)
Tucson (TL)
Tucson Fuel Cell (LM
FCEV)
Veloster (FS/JS)

MDPS-ECU
Assy

Please see
WEB LTS for
current LTS
time

56340*

I11

ZZ3

MDPS-ECU
Assy

Please see
WEB LTS for
current LTS
time

56345*

I11

ZZ3

I11

ZZ3

Azera (HG)
Tucson (LM)

56345R00

Please see
Palisade (LX2)
WEB LTS for
56370R00
56370*
Santa Fe (TMa)
current LTS
time
NOTE: Dealers may claim $0.10 on sublet for reimbursement of grease.
* Refer to applicable parts catalog for full causal part numbers.
Electronic
Power Pack
Assy

TSB #: 20-ST-001H

Page 3 of 6
SUBJECT:

SUBJECT:

MDPS MOTOR AND ECU REPLACEMENT INFORMATION

MODEL

OP CODE OPERATION

OP TIME

Accent (RB/HC)
Steering
Azera (HG)
Column Shaft
56300R0S
Elantra (MD/UD/AD)
Assembly
Elantra Coupe (JK)
(MDPS)
Elantra GT (GD/PD)
Steering
Ioniq (AE HEV/PHEV/EV)
Column &
Kona (OS/OS EV)
56390R00
Housing Assy
Palisade (LX2)
Please see
(C-MDPS)
Santa Fe (TMa)
WEB LTS for
Santa Fe / XL (NC)
current LTS
Santa Fe Sport (AN)
time
Sonata (YF/LF)
Joint And/Or
Sonata Hybrid (YF HEV/LF
Coupling
HEV/LF PHEV)
56400R00
AssyTucson (LM/TL)
Universal
Tucson Fuel Cell (LM
FCEV)
Veloster (FS/JS)

CAUSAL NATURE CAUSE
PART
CODE
CODE

56310*

56390*
I11

ZZ3

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







MDPS Repair Flowchart is meant to be used as reference guide only. See MDPS DTC
table for more details.
It is recommended to replace the column & housing assembly,
o In cases of no DTC(s) with symptoms of binding/sticking steering feel.
o Noise diagnosed to be coming from column & housing assembly.
Refer to the shop manual for other common MDPS noise repairs.
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 #: 20-ST-001H

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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.

 Scraping/growling noise when
turning steering wheel –
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

Replace the
MDPS ECU (or
MDPS Power
Pack Assy).

Motor-Related
C2400
C2401

Replace the
MDPS motor (or
MDPS Power
Pack Assy).

Column & HousingRelated
C1259
C1290

Replace the
column & housing
assy.

Connectors / Wiring Related
C1260, C1261, C1611, C1612, C1616,
C1622, C1628, C1646, C1656, C1692,
C1693, C1696, C1697

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

NOTICE




For cases with multiple DTCs:
o If the DTCs relate to more than a single MDPS component, it is recommended to
replace the full MDPS assembly (56310).
o If the DTCs relate only to a single MDPS component, it is recommended to
replace only the suspect component.
DTCs shown are based on the 5-digit DTC system. For vehicles showing 7-digit DTCs,
refer to the DTC that matches only the first 5-digits.

TSB #: 20-ST-001H

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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

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 #: 20-ST-001H

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
(or Power Pack Assy).

If DTC returns, replace MDPS
motor (or Power Pack Assy).
First replace MDPS ECU (or Power
Pack Assy).
If DTC returns, replace MDPS
motor (if applicable).
If DTC returns, replace MDPS ECU
(or Power Pack Assy).


If DTC returns and MDPS is
inoperable, replace MDPS ECU
(or Power Pack Assy).



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

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