TSB_CHA084_R8

GROUP
CHA
NUMBER
084 (Rev 8, 10/05/2021)
MODEL
All Applicable
Models with
C-MDPS
DATE
November 2018
TECHNICAL SERVICE BULLETIN
SUBJECT:
PARTIAL REPAIR OF C-MDPS MOTOR, ECU, WORM GEAR
AND/OR STEERING COLUMN HOUSING
 NOTICE
This bulletin has been revised to include additional information. New/revised sections of
this bulletin are indicated by a black bar in the margin area.
This bulletin provides information regarding the partial repair of the Motor Driven Power Steering (MDPS)
Motor, Electronic Control Unit (ECU), Steering Column Housing, or Worm Gear Assembly on some
2010MY~ Kia models listed on page 8, equipped with a Column Motor Driven Power Steering (C-MDPS)
unit . On some vehicles when the steering wheel is rotated a scraping noise can be heard originating from
the lower bearing on the Worm Gear Assembly and does not affect the steering effort. Follow the MDPS
Repair Flowchart (page 2) and the C-MDPS Common Concerns Flowchart (page 3), along with the MDPS
DTC Table (page 4), and procedure outlined in this bulletin before replacing the C-MDPS Motor, ECU,
Worm Gear Assembly, or Steering Column Housing.
 NOTICE
If attempting to perform CHA084 worm gear repair and the parts are not available refer to
CHA111 to perform the worm gear bearing replacement.
WARNING*
To prevent personal injury and damage to the clockspring, keep the steering wheel in the
straight-ahead position whenever disconnecting any portion of the steering column.
 NOTICE
•
•
•
MDPS Repair Flowchart and Common Noise Flowchart are meant to be used as a
reference guide only. See MDPS DTC table for more details.
Note that some DTC(s) may be found in systems other than Electric Power Steering
(EPS) in KDS. They may be found in the Brake/ABS/ESC system. Check all systems for
DTC(s).
Replacing the complete C-MDPS Steering Column Assembly is NOT allowed when the
components failure is identified in the flowchart. In addition, replacing the Steering
Column Housing is NOT allowed when the problem source is the C-MDPS Worm Gear
Assembly (for applicable models).
Printed TSB copy is for reference only; information may be updated at any time.
Always refer to KGIS for the latest information.
Circulate To:
X General Manager

X Service Advisors

X Technicians

X Service Manager

X Parts Manager

X Body Shop Manager 
X Fleet Repair

Page 2 of 9
SUBJECT:
REPLACEMENT OF C-MDPS MOTOR, ECU,
WORM GEAR ASSEMBLY AND/OR STEERING COLUMN HOUSING
MDPS Repair Flowchart
Vehicle in for
MDPS related complaint.
NOISE:
Refer to
C-MDPS Common
Noise Concerns
flowchart on page 3.
C-MDPS Worm Gear*
replacement, page 6.
*Mobis C-MDPS only.
•
•
•
MIL is ON:
DTC(s) Present / CAN
Line Error.
See DTC Table on page 4.
Check MDPS connectors and wiring.
Erase DTC(s) and re-check.
If DTC(s) are still present, follow the recommended
repair per DTC stored.
ECU Related:
C1112
C1604
C1623
C1687
C1688
C1704
C1705
C2412
C2413
NO MIL:
No DTC(s) Present
Sticking/Binding
Refer to CHA060 TSB
Motor Related:
C2400
C2401
Column and
Housing
Related:
Connectors/
Wiring
Related:
C1259
C1290
C1260, C1261,
C1611, C1612,
C1616, C1622,
C1628, C1646,
C1656, C1692,
C1693, C1696,
C1697
Replace the Column
and Housing Assy.
Check DTC(s) and Wiring at HECU/MDPS/EMS:
Replace the
MDPS ECU.
Replace the
MDPS Motor.
•
•
•
•
Check connectors for poor connection.
Check for connector corrosion.
Check for connector damage or deformation.
Check the DTC Diagnostic Guide on KGIS.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: CHA084 (Rev 8) Multiple Models November 2018
Page 3 of 9
SUBJECT:
REPLACEMENT OF C-MDPS MOTOR, ECU,
WORM GEAR ASSEMBLY AND/OR STEERING COLUMN HOUSING
C-MDPS
Common Noise Concerns Flowchart
Worm Gear
C-MDPS
Noise Inspection Steps
Video: Worm Shaft Bearing Noise
Applicable Models Only: Mobis C-MDPS
1. Check C-MDPS
Noise present from the column and housing
Noise present from C-MDPS motor
Noise from C-MDPS Worm Shaft Bearing
Problem Found
Replace defective part:
C-MDPS Worm Gear assembly
or Steering Column and Housing
or C-MDPS Motor assembly.
No problem found
2. Check the C-MDPS Mounting Position
Inspect cowl mounting and cross member bolt
Inspect C-MDPS mounting bolts
C-MDPS
C-MDPS Mounts
Problem Found
Retighten bolt
Problem Found
Retighten U-joint bolt
No problem found
3. Check U-Joint Mounting Bolt
Inspect U-joint retaining bolt, check for noise
after disassembling/re-assemble.
U-Joint(s)
No problem found
Tie Rod End
4. Check Tire-Rod End Joint for Free Play
Problem Found
Replace defective part
Problem Found
Retighten bolt
Problem Found
Replace defective part
No problem found
5. Check Steering Gear box Mounting Bolt
Steering Gear Box
No problem found
6. Check Steering Gear Box Noise
Mounts
No problem found
7. Check Steering Wheel
Inspect the condition of the (Driver s Air bag)
DAB wiring (ex. DAB, clock spring,
multifunction switch-MFS )
Problem Found
Replace defective part
Clock
Spring
MFS
 IMPORTANT
The Clockspring must be kept on center during installation of the Clockspring to prevent cable damage, this is also true when
the MDPS column is removed – the steering shaft must be locked in position to prevent the Clockspring cable from becoming
off-center. Failure to follow these instructions may result in a damaged Clockspring and will be subject to a dealer chargeback.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: CHA084 (Rev 8) Multiple Models November 2018
Page 4 of 9
SUBJECT:
REPLACEMENT OF C-MDPS MOTOR, ECU,
WORM GEAR ASSEMBLY AND/OR STEERING COLUMN HOUSING
MDPS DTC TABLE
DTC
Concern
C1102
Battery Voltage Problem
C1603
MDPS Thermal Protection
C1611
CAN Time Out EMS
C1616
CAN BUS OFF
C1622
Vehicle Speed Signal Error
C1696
C1697
SPAS Signal Error
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
C1260
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. C
heck 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 h
ousing assembly.
If DTC returns and MDPS is
inoperable, replace MDPS ECU.
If DTC returns and MDPS
operation is normal, continue
investigation into wiring issues.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: CHA084 (Rev 8) Multiple Models November 2018
Page 5 of 9
SUBJECT:
REPLACEMENT OF C-MDPS MOTOR, ECU,
WORM GEAR ASSEMBLY AND/OR STEERING COLUMN HOUSING
Replacement Procedure for Worm Gear Assembly (Mobis Only):
1.
Remove 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.
A
Note: Be sure mark the steering column
shaft to the intermediate shaft for reassembly purposes.
*Refer to Clockspring Warning on page 1.
2.
Using the worm shaft plug SST (B) loosen
the worm shaft nut (C) and remove the
worm shaft.
C
Torque Specifications for nut (C) Refer
to page 8 for applicable model:
0K563 T9100FFF (34.9mm): 27.5 – 34.7
lb.ft (37.2 – 47.0 N.m (3.8 – 4.8 kgf·m)
0K563 Q2100FFF (42.0mm): 51.7 – 59.0
lb.ft (70.0 – 80.0 N.m (7.2 – 8.2 kgf.m)
B
0K563 D6100FFF (44.9mm): 81.2 –
103.2 lb.ft (110.0 – 140.0 N.m (11.3 –
14.3 kgf.m)
3.
Loosen the 5mm hex plug (D) and then
remove the anti-rattle plug assembly.
Torque Specifications for plug (D):
7.3 - 9.4 lb.ft (9.8 - 12.8 N.m,
1.0 - 1.3 kgf.m)
D
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: CHA084 (Rev 8) Multiple Models November 2018
Page 6 of 9
SUBJECT:
4.
REPLACEMENT OF C-MDPS MOTOR, ECU,
WORM GEAR ASSEMBLY AND/OR STEERING COLUMN HOUSING
Using a set of vise grips, remove the
worm shaft assembly (E).
Note: Reuse the flexible coupling unless
there is visible damage or wear. Replace
as needed.
E
5.
Apply grease to worm gear shaft (E)
portion only (OK). Grease should not be
applied to the bearing (NG).
Note: Grease is included (20g) with worm
gear assembly.
E
6.
Install the new worm shaft assembly (E)
in the reverse order of removal.
7.
Using a torque wrench and SST (B),
tighten the shaft nut (C).
Refer to torque specifications on step 2.
8.
Re-install all removed parts in the reverse
order of removal.
Note: Be sure to follow the SAS
Calibration, EPS Type Recognition as
outlined on KGIS.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: CHA084 (Rev 8) Multiple Models November 2018
Page 7 of 9
SUBJECT:
REPLACEMENT OF C-MDPS MOTOR, ECU,
WORM GEAR ASSEMBLY 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.
Note: Be sure mark the steering column
shaft to the intermediate shaft for reassembly purposes if removing the
steering column and housing assembly.
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.
Note: Be sure mark the steering column
shaft to the intermediate shaft for reassembly purposes if removing the
steering column and housing assembly.
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.
Note: Be sure mark the steering column
shaft to the intermediate shaft for reassembly purposes.
*Refer to Clockspring Warning on page 1.
 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.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: CHA084 (Rev 8) Multiple Models November 2018
Page 8 of 9
SUBJECT:
REPLACEMENT OF C-MDPS MOTOR, ECU,
WORM GEAR ASSEMBLY AND/OR STEERING COLUMN HOUSING
AFFECTED VEHICLE RANGE:
Model
MDPS Supplier
Model Year Range
Mobis
All Applicable Models
2010MY~
with C-MDPS
Soul (AM), Optima (QF, TF, TF HEV),
Cadenza (VG), and Forte (YD, YDm)
Forte (BD, BDm, YD, YDm), Niro (DE, DE HEV/PHEV/
EV), Optima (JF/JFa, JF HEV/PHEV) Soul (PS,
PS EV), Sorento (UMa) and Cadenza (YG)
Rio (UB, SC), Sportage (SL, QL)
and Sorento (XMa)
Mando
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
REQUIRED TOOL AND WORM GEAR P/N (INCLUDES GREASE):
Model/ Model Year
MDPS Assy
2017-2018 YD(m)
2018-2019 PS/PS EV
2017-2018 JFa/UMa
2017 JF HEV
Refer to EPC
SST Part Number
(Size)
Image
56351 B3AAA FFF
0K563 T9100FFF
(34.9mm)
(NonIntegrated)
56351 C5AAA FFF
0K563 D6100FFF
(44.9mm)
2019-2020 JFa, UMa
2018-2020 JF HEV
2017-2020 YG
2017 DE
Worm Shaft Kit Part
Number
56351 F6AAAFFF
56310-G5100
56310-G5300
56351 F2AAAFFF
See Note Below*
2019-2020 BD(m)
2017 DE
Refer to EPC
56310-G5101
56310-G5301
0K563 Q2100FFF
(42mm)
(Integrated)
56351 G3AAAFFF
See Note Below*
2018-2020 DE/DE EV/
DE PHEV
Refer to EPC
*Note: DE requires the reference to MDPS assembly to ensure the proper part is installed;
Integrated vs. Non-Integrated.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: CHA084 (Rev 8) Multiple Models November 2018
Page 9 of 9
REPLACEMENT OF C-MDPS MOTOR, ECU,
WORM GEAR ASSEMBLY AND/OR STEERING COLUMN HOUSING
SUBJECT:
WARRANTY INFORMATION:
N Code: D61 C Code: ZZ4
Replacement
P/N
Qty.
N/A
0
Op
Time
Replacement
P/N
Qty.
PS, PS
EV, YD
1.4
M/H
56351
B3AAAFFF
JF, JF
HEV, JFa
1.3
M/H
56351
C5AAAFFF
1.1
M/H
56351
F2AAAFFF
Model
All Models
Listed
Claim
Type
W
Causal
P/N
Refer to
EPC
Qty.
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
Labor Op
Code
WARRANTY INFORMATION (WORM GEAR):
N Code: Q55 C Code: ZZ1
Model
Claim
Type
Causal
P/N
Qty.
DE
W
JF, JF
HEV, JFa,
YG
*Refer to
EPC
0
Repair
Description
C-MDPS
Worm Gear
Replacement
(for applicable
models only)
BD, BDm,
DE, DE
PHEV, DE
EV
56351F01
1
1.3
M/H
56351
F6AAAFFF
1.1
M/H
56351
G3AAAFFF
1.2
M/H
UMa
56351
C5AAAFFF
56351
F6AAAFFF
*Note: Refer to EPC for Steering Column and Housing Assembly.
WARNING*
To prevent personal injury and damage to the clockspring, keep the steering wheel in the
straight-ahead position whenever disconnecting any portion of the steering column.
Printed TSB copy is for reference only; information may be updated at any time. Always refer to KGIS for the latest information.
TSB: CHA084 (Rev 8) Multiple Models November 2018