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Column-Mounted MDPS Repair Information (22-ST-002H)

Publication date: 2022-01-11
Reference number: 22-ST-002H
Supersedes refnos: 18-ST-002, 18-ST-002-1, 19-ST-001H, 20-ST-001H, 20-ST-001H-1, 20-ST-001H-2

COLUMN-MOUNTED MDPS REPAIR INFORMATION

COLUMN-MOUNTED MDPS REPAIR INFORMATION

TECHNICAL SERVICE BULLETIN

Reference Number(s): 22-ST-002H, Date of Issue:  January 11, 2022
HYUNDAI: All Models
GROUP: STEERING
Superceded Bulletin(s): 20-ST-001H-2

REVISION HISTORY

THIS TSB SUPERSEDES 20-ST-001H-2 TO REVISE THE WORM SHAFT BEARING REPAIR INFORMATION, TO INCLUDE THE TORQUE ANGLE SENSOR HARNESS REPLACEMENT, AND TO UPDATE THE APPLICABLE MODELS. 

DESCRIPTION

This bulletin provides information regarding replacement of the column-mounted Motor Driven Power Steering (C-MDPS) system as separate components.

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Applicable Vehicles:  Accent (RB/HC), Azera (HG), Elantra (MD/UD/AD/ADA/CN7/CN7A), Elantra Hybrid (CN7 HEV), 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), Nexo (FE), Palisade (LX2), Santa Cruz (NXT), Santa Fe (TMA), Santa Fe Hybrid/Plug-In (TM HEV/TM PHEV) 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/NX4/NX4A), Tucson HEV (NX4 HEV/NX4 PHEV), Tucson Fuel Cell (LM FCEV), Veloster (FS/JS), Venue (QX)

NOTE: This TSB is to serve as a general guideline for repairs.
  • Refer to the applicable model's shop manual for the detailed diagnostic and repair service procedures.
  • Refer to TSBs that might supersede the information provided in this TSB.

PARTS INFORMATION

PARTS OF C-MDPS SYSTEM 

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  1. Column & Shaft Assembly (C-MDPS full assembly)
  2. Column & Housing Assembly
  3. C-MDPS Motor
  4. C-MDPS ECU
  5. Universal Joint Assembly
  6. Electric Power Pack (C-MDPS Motor and C-MDPS ECU assembly)
  7. Worm Shaft Bearing Kit
  8. Steering Universal Joint Pinch Bolts (Upper and Lower)
  9. Torque Angle Sensor Harness (Cable Assy-Sensor)
GREASE FOR MANDO SYSTEMS REMARKS
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 For Mando C-MDPS vehicles below:
  • Accent (RB/HC)
  • Tucson (LM/TL)
  • Tucson Fuel Cell (LM FCEV)
  • Santa Fe Sport (AN)

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
NOTE:
  • Refer to the applicable parts catalog for specific application part numbers.

SPECIAL SERVICE TOOLS INFORMATION

SPECIAL SERVICE TOOLS INFORMATION

TOOL NAME IMAGE SST NUMBER
Chassis Ears
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 J-39570
NOTE: Chassis Ears are available for order through Bosch: 1-866-539-4248

WARRANTY INFORMATION

WARRANTY INFORMATION

MODEL OP CODE OPERATION OP TIME CAUSAL PART NATURE CODE CAUSE CODE
Accent (RB/HC) Azera (HG)
Elantra (MD/UD/AD/ADA)
Elantra Coupe (JK)
Elantra GT (GD/PD)
Ioniq (AE HEV/PHEV/EV)
Kona (OS/OS EV)
Santa Fe/XL (NC)
Santa Fe Sport (AN)
Sonata (YF/LF)
Sonata Hybrid (YF HEV/LF HEV/LF PHEV)
Tucson (LM/TL)
Tucson Fuel Cell (LM FCEV)
Veloster (FS/JS)
Venue (QX)		 56330R00 C-MDPS (EPS) Motor Please see WEB LTS for current LTS time 56330(1) I11 ZZ3
56345R00 C-MDPS ECU Assy Refer to parts catalog and WEB LTS for applicable part numbers
Elantra (CN7/CN7A)
Elantra Hybrid (CN7 HEV/CN7 PHEV)
Nexo (FE)
Palisade (LX2)
Santa Cruz (NXT)
Santa Fe (TMA)
Santa Fe Hybrid (TM HEV/TM PHEV)
Sonata (DN8A)
Sonata Hybrid (DN8 HEV)
Tucson (NX4A)
Tucson Hybrid (NX4 HEV/NX4 PHEV)		 56370R00 Electronic Power Pack Assy Please see WEB LTS for current LTS time 56370(1) I11 ZZ3
Accent (RB/HC)
Azera (HG)
Elantra
(MD/UD/AD/ADa/CN7/CN7A)
Elantra HEV (CN7 HEV)
Elantra Coupe (JK)
Elantra GT (GD/PD)
Ioniq (AE HEV/PHEV/EV)
Kona (OS/OS EV)
Nexo (FE)
Palisade (LX2)
Santa Cruz (NXT)
Santa Fe (TMA)
Santa Fe Hybrid (TM HEV/TM PHEV)
Santa Fe/XL (NC)
Santa Fe Sport (AN)
Sonata (YF/LF/DN8A)
Sonata Hybrid (YF HEV/LF
HEV/LF PHEV/DN8 HEV)
Tucson (LM/TL/NX4/NX4A)
Tucson Fuel Cell (LM FCEV)
Tucson Hybrid (NX4 HEV/NX4 PHEV)
Veloster (FS/JS)
Venue (QX)		 56300R0S Steering Column Shaft Assembly
(C-MDPS)		 Please see WEB LTS for current LTS time 56310(1) I11 ZZ3
56390R00 Steering Column & Housing Assy
(C-MDPS)		 56390(1)
56400R00 Joint And/Or Coupling Assy-Universal 56400(1)
Accent (RB/HC)
Azera (HG)
Elantra
(MD/UD/AD/ADa/CN7/CN7A)
Elantra HEV (CN7 HEV)
Elantra Coupe (JK)
Elantra GT (GD/PD)
Kona (OS/OS EV)
Nexo (FE)
Palisade (LX2)
Santa Cruz (NXT)
Santa Fe (TMA)
Santa Fe Hybrid (TM HEV/TM PHEV)
Santa Fe/XL (NC)
Santa Fe Sport (AN)
Sonata (YF/LF/DN8A)
Sonata Hybrid (YF HEV/LF HEV/LF PHEV/DN8 HEV)
Tucson (LM/TL/NX4/NX4A)
Tucson HEV (NX4 HEV)
Tucson Fuel Cell (LM FCEV)
Veloster (FS/JS)
Venue (QX)		 56397R00 Cable Assy-Sensor (Torque Angle Sensor, TAS, Harness) Please see WEB LTS for current LTS time 56397(1) I11 ZZ3
Elantra (AD/ADA)
Elantra GT (PD)
Ioniq (AE HEV/PHEV/EV)
Kona (OS/OS EV)
Palisade (LX2)
Santa Fe/XL (NC)
Sonata (LF/DN8A)
Sonata Hybrid (LF HEV/LF PHEV/DN8 HEV)
Veloster (FS)		 Please refer to the latest applicable "C-MDPS Worm Shaft Bearing Noise" TSB Small Bearing Replacement 0.6 M/H 56359-L1AAA
FFF		 Q57 ZZ6
(1) Refer to applicable parts catalog for full causal part numbers. 
NOTE: Dealers may claim $0.10 on sublet for reimbursement of grease.
NOTE: Normal warranty applies.

SERVICE PROCEDURE

NOTE:
  • 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,
    • In cases of no dTC(s) with sympto ms of binding/sticking steering feel.
    • 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 latest applicable "C-MDPS Worm Shaft Bearing Noise" TSB.
  • 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. 

C-MDPS REPAIR FLOWCHART

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NOTE:
  • For cases with multiple DTCs  :
    • If the DTCs relate to more than a single C-MDPS component, it is recommended to replace the full C-MDPS assembly (56310).
    • If the DTCs relate only to a single C-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.
C-MDPS DTC TABLE

DTC Description First Inspection Method Repair Recommendations
C1102 Battery voltage problem Check battery voltage condition. Recharge battery voltage.
C1603 MDPS thermal protection Investigate driving conditions DTC is set. This DTC protects motor from overheating. No replacement necessary.
C1611 CAN time out EMS
  1. Check GDS condition.
  2. Check wiring and connector condition.
  3. Check ECU CAN line.
  4. Check C-MDPS ground.
 Check EMS CAN line.
C1616 CAN BUS OFF Check the chassis CAN line.
C1622 Vehicle speed signal error Check the EMS (Engine ECU).
C1696, C1697 SPAS signal error Check SPAS and associated wiring. Repair as necessary. Erase DTC(s).
Full C-MDPS assy is not to be replaced.
C1612, C1646 TCU signal error Check TCU and associated wiring.
C1628, C1656 Instrument cluster signal error Check instrument cluster and associated wiring.
C1692, C1693 VSM signal error Check VSM and associated wiring.
C1259 Steering angle sensor signal error Reset steering angle sensor calibration and erase DTC(s). Check wiring (torque angle sensor TAS, see below for details)  and connector condition. If DTC returns, replace column & housing assembly.
If a problem is found with TAS wiring, replace TAS Harness.
C1260 Steering angle sensor signal error Reset steering angle sensor calibration. If DTC returns, inspect wiring and connector condition.
C1261 Zero-setting error
C1290 Torque sensor signal error First erase DTC, then check wiring (torque angle sensor (TAS), see below for details) 
and connector condition.		 If DTC returns, replace column & ho using assembly.
If a problem is found with TAS wiring, replace TAS Harness.
C1112 Torque sensor voltage error Check wiring and connector condition between torque sensor and ECU. If DTC returns, replace C-MDPS ECU (or Power Pack Assy).
C1704 ECU fail-safe relay fault First erase DTC, then check wiring and connector at ECU.
C1705 ECU hardware error
C1604 ECU over/discharge error
C2413 ECU hardware error
C2400 Motor signal error If DTC returns, replace MDPS motor (or Power Pack Assy).
C2401 Motor circuit error
C2412 Motor voltage supply error First erase DTC, check wiring and connector between ECU and motor. First replace C-MDPS ECU (or Power Pack Assy). If DTC returns, replace C-MDPS motor (if applicable).
C1623 CAN time out SAS
  1. Check C-MDPS power connector and fuse.
  2. Check C-MDPS ground line.
  3. Check C-MDPS ECU/VSM CAN line.
  4. Communication status with GDS.
  5. Check for C1259 -> if present with these DTCs, replace column and housing assembly.
 If DTC returns, replace C-MDPS ECU (or Power Pack Assy).
C1687 CAN time out VSM
C1688 VSM signal error If DTC returns and C-MDPS is inoperable, replace C-MDPS ECU (or Power Pack Assy). If DTC returns and C-MDPS operati on is normal, continue investigation into wiring issues.
For TMa,  if C1688 occurs along with C1700, replace Power Pack Assy.

TORQUE ANGLE SENSOR (TAS) HARNESS INSPECTION

In the presence of DTC C1259 (steering angle sensor signal error) and/or C1290 (torque sensor signal error), inspect the condition of the TAS harness.

Remove the grommet (A) and check the wiring on both TAS side (B) and ECU side (C). Check for damage, push-back, or improper connection.

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Replace this harness with the applicable TAS harness found in the parts catalog if any issues are found.

STEERING NOISE REPAIR INFORMATION

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C-MDPS ASSEMBLY NOISE INFORMATION

NOTE:
  • Use Chassis Ears (SST #J-39570) attached to the areas shown below to isolate source of noise within C-MDPS assembly.
  • One way to verify that the source of noise is the column & housing assembly is to remove the part, and turn the assembly with the C-MDPS motor removed, as shown below.

Method #1

Use intermediate shaft to turn steering column.

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Method #2

Use pliers with a shop towel to turn steering column.

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  1. Small bearing noise - Growling/grinding/bearing noise

    https://youtu.be/22PI3hAEfnk 

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    Check for this noise at the worm gear area, as shown.

    If the noise source is confirmed from this location:

    → Refer to the latest applicable "C-MDPS Worm Shaft Bearing Noise" TSB.

  2. Ticking noise -

    Check for this noise on the column & housing as shown.

    If the noise source is confirmed from this location:

    → Replace the column & housing assembly. 

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  3. Motor noise -

    Check the motor for noise.

    If the noise source is confirmed from this location:

    → Replace the C-MDPS motor or C-MDPS Electric Power Pack (as appropriate). 

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