20-ST-001H-1 Service Bulletin/Repair Instructions

GROUP

STEERING
Technical Service Bulletin

SUBJECT:
DATE

AUGUST, 2020
NUMBER

20-ST-001H-1

MODEL(S)

See Below
COLUMN-MOUNTED MDPS REPAIR INFORMATION
THIS TSB SUPERSEDES 20-ST-001H TO INCLUDE ADDITIONAL C-MDPS COMPONENTS,

DIAGNOSTIC, AND REPAIR INFORMATION.

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/DN8a), Sonata Hybrid/Plug-In (YF HEV/ LF HEV/LF PHEV/DN8

HEV), 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:
C-MDPS COMPONENT REPLACEMENT INFORMATION
Parts Information:

Partial Parts of C-MDPS System
7
8
1.

2.

3.

4.

5.

6.
Column & Shaft Assembly (C-MDPS full assembly)

Column & Housing Assembly

C-MDPS Motor

C-MDPS ECU

Universal Joint Assembly

Electric Power Pack (C-MDPS Motor and C-MDPS ECU assembly. Applicable to Palisade (L

X2) and Santa Fe (TMa).

7. Worm Gear Assembly

8. Steering Universal Joint Pinch Bolts (Upper and Lower)
NOTICE


Refer to the applicable parts catalog for specific application part numbers.

Grease for Mando Systems
Remarks

For Mando C-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.
Part Number: YSBB0-91105-FFF
TSB #: 20-ST-001H-1
*Each tube of grease can be used

on approximately 15 vehicles.
Page 2 of 13

SUBJECT:
C-MDPS COMPONENT REPLACEMENT INFORMATION
SUBJECT:
Special Service Tools Information:

Tool Name
Image
SST Number
Chassis Ears
J-39570
NOTICE


Chassis Ears are available for order through Bosch: 1-866-539-4248
TSB #: 20-ST-001H-1
Page 3 of 13

SUBJECT:
SUBJECT:
C-MDPS COMPONENT 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)

C-MDPS

56330R00

Santa Fe Sport (AN)

(EPS) 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)
C-MDPSECU Assy
Please see

WEB LTS for

current LTS

time
56340*
I11
ZZ3
C-MDPSECU Assy
Please see

WEB LTS for

current LTS

time
56345*
I11
ZZ3
I11
ZZ3
Azera (HG)

Tucson (LM)
56345R00
Palisade (LX2)

Please see

Electronic

Santa Fe (TMa)

WEB LTS for

56370R00 Power Pack

56370*

Sonata (DN8a)

current LTS

Assy

Sonata Hybrid (DN8 HEV)

time

NOTE: Dealers may claim $0.10 on sublet for reimbursement of grease.

* Refer to applicable parts catalog for full causal part numbers.
TSB #: 20-ST-001H-1
Page 4 of 13

SUBJECT:
SUBJECT:
C-MDPS COMPONENT REPLACEMENT INFORMATION
MODEL
OP CODE
OPERATION
OP TIME
CAUSAL NATURE CAUSE

PART

CODE

CODE
Accent (RB/HC)

Steering

Azera (HG)

Column Shaft

56300R0S

56310*

Elantra (MD/UD/AD)

Assembly

Elantra Coupe (JK)

(C-MDPS)

Elantra GT (GD/PD)

Steering

Ioniq (AE HEV/PHEV/EV)

Column &

56390R00

56390*

Kona (OS/OS EV)

Housing Assy

Palisade (LX2)

(C-MDPS)

Please see

Santa Fe (TMa)

WEB LTS for

Santa Fe / XL (NC)

current LTS

Santa Fe Sport (AN)

time

Sonata (YF/LF/DN8a)

Joint And/Or

Sonata Hybrid (YF

Coupling

HEV/LF HEV/LF

56400R00

56400*

AssyPHEV/DN8 HEV)

Universal

Tucson (LM/TL)

Tucson Fuel Cell (LM

FCEV)

Veloster (FS/JS)

Elantra (AD/ADa)

Elantra GT (PD)

Please see

Please see

Ioniq (AE HEV/PHEV/EV)

applicable

applicable

Kona (OS/OS EV)

“MDPS Worm MDPS Worm “MDPS Worm

Palisade (LX2)

Gear Bearing

Gear

Gear Bearing

56390*

Santa Fe / XL (NC)

Noise” TSB

Assembly

Noise” TSB

Sonata (LF/DN8a)

20-ST-003H Replacement 20-ST-003H

Sonata Hybrid (LF HEV/LF

Or

Or

PHEV/DN8 HEV)

20-ST-002H-1

20-ST-002H-1

Veloster (FS/JS)

NOTE: Dealers may claim $0.10 on sublet for reimbursement of grease.

* Refer to applicable parts catalog for full causal part numbers.
TSB #: 20-ST-001H-1
I11
ZZ3
Q57
ZZ7
Page 5 of 13

SUBJECT:
SUBJECT:
C-MDPS COMPONENT REPLACEMENT INFORMATION
Service Procedure:
NOTICE













C-MDPS Repair Flowchart is meant to be used as reference guide only. See C-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.

 However, if the noise is diagnosed to be coming from the worm shaft

bearing, refer to the applicable “C-MDPS Worm Shaft Bearing Noise” TSB

20-ST-003H or 20-ST-002H-1

If the pinch bolts on either ends of the steering universal joint assembly are removed,

the bolts cannot be reused during reassembly.

Refer to the shop manual for other common C-MDPS noise repairs.

If a C-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-1
Page 6 of 13

SUBJECT:
SUBJECT:
C-MDPS COMPONENT REPLACEMENT INFORMATION

C-MDPS Repair Flowchart

Vehicle in dealer for C-MDPSrelated concern.
Noise – See C-MDPS Noise Repair

Information in this TSB.


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

https://youtu.be/ZCxFSskN-Rg

– Refer to the appropriate

“C-MDPS Worm Shaft Bearing

Noise” TSB, 20-ST-003H or

20-ST-002H-1

1. Check C-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

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