NHTSA ID Number: 10237813
Manufacturer Communication Number: B23-021
TSB/Document Date: 2023-06-15
Summary
Service Bulletin - Due to manufacturing errors, abnormal noise may be heard from the rear when driving straight or making small side-toside turning movements with the steering wheel. The MIL may also illuminate with DTC C1600-94 (PAWS unexpected behavior) and/or C1611-13/C1621-13 (PAWS actuator disconnection L&R).
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TSB/Document ID: B23-021
Replacement Service Bulletin Number:
MFR Communication Date: 2023-06-11
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: STEERING
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
Service Bulletin
23-021
June 9, 2023
Version 1
Warranty Extension: Moaning or Rubbing Noise from P-AWS RTC
Actuators and/or P-AWS Indicator On With DTC C1600-94, C1611-13, or
C1621-13 (Expires 01/31/2024)
AFFECTED VEHICLES
Year
Model
VIN Range
2013–14
RLX
ALL with P-AWS
Check the iN VIN status for eligibility.
BACKGROUND
Due to manufacturing errors, abnormal noise may be heard from the rear when driving straight or making small side-toside turning movements with the steering wheel. The MIL may also illuminate with DTC C1600-94 (PAWS unexpected
behavior) and/or C1611-13/C1621-13 (PAWS actuator disconnection L&R).
Acura
is extending the warranty coverage on the rear toe control actuator for certain 2013-2014 RLX vehicles to
01/31/2024 with no mileage limitation.
CLIENT NOTIFICATION
Owners of affected vehicles will be sent a notification of this campaign.
Do an iN VIN status inquiry to make sure the vehicle is shown as eligible.
CORRECTIVE ACTION
Perform the inspection procedure and, if necessary, replace the RTC actuator(s).
CLIENT INFORMATION:The information in this bulletin is intended for use only by skilled technicians who have the proper tools, equipment, and
training to correctly and safely maintain your vehicle. These procedures should not be attempted by “do-it-yourselfers,” and you should not assume
this bulletin applies to your vehicle, or that your vehicle has the condition described. To determine whether this information applies, contact an
authorized Acura automobile dealer.
©
2023 American Honda Motor Co., Inc. — All Rights Reserved
Page 1 of 8
PARTS INFORMATION
Part Name
Part Number
Quantity
Left RTC Actuator
52345-TY2-A15
1
Right RTC Actuator
52340-TY2-A15
1
93403-08016-08
1 required if replacing one
side
2 required if replacing both
sides
Inner Self-Locking Nut (12mm)
90213-SJ6-004
1 required if replacing one
side
2 required if replacing both
sides
Outer Self-Locking Nut (12mm)
90370-SJA-000
1 required if replacing one
side
2 required if replacing both
sides
Rear Control Arm Adjusting Bolt
90178-TY2-A01
1 required if replacing one
side
2 required if replacing both
sides
Page 2 of 8
WARRANTY CLAIM INFORMATION
Operation
Number
Description
Flat Rate
Time
Defect
Code
Symptom
Code
Template
ID
Failed Part Number
4191L3
REPLACE LEFT RTC
ACTUATOR– Includes
DTC clear, VSA/
Steering position learn,
register actuator and
alignment.
1.3 hr
6A600
UEE00
B23021A
52345-TY2-A13
A
REPLACE RIGHT SIDE 0.2 hr
RTC ACTUATOR - Add
4191L3
REPLACE RIGHT RTC
ACTUATOR– Includes
DTC clear, VSA/
Steering position learn,
register actuator and
alignment.
1.3 hr
A
REPLACE LEFT SIDE
RTC ACTUATOR - Add
0.2 hr
B23021B
6A600
UEE00
B23021C
52340-TY2-A13
B23021D
Skill Level: Repair Technician
Page 3 of 8
INSPECTION PROCEDURE
Noise Inspection
Drive the vehicle forward moving the steering wheel slowly side-to-side to confirm the noise.
Then, drive the vehicle slowly in reverse moving the steering wheel in the same way that caused the vehicle to make
noise when moving forward (the actuators are not operated in reverse).
Did the noise stop in reverse?
YES – go to REPAIR PROCEDURE to replace RTC actuator(s) that are making noise.
NO – If the noise does not stop in reverse, this bulletin does not apply. Continue with normal troubleshooting.
NOTE: Use the ChassisEAR diagnostic tool to assist with isolating the source of the noise.
To Verify DTC
Connect the HDS and check for the following DTCs:
C1600-94 Precision All Wheel Steer System Unexpected Operation,
C1611-13 Left Rear Precision All Wheel Steer Actuator Circuit Open,
C1621-13 Right Rear Precision All Wheel Steer Actuator Circuit Open.
Are any of these DTCs Stored?
YES – go to REPAIR PROCEDURE.
•
If C1611-13 is stored, replace left RTC actuator.
•
If C1621-13 is stored, replace right RTC actuator.
•
If C1600-94 is stored, replace both RTC actuators.
NO – This bulletin does not apply, continue with normal troubleshooting.
REPAIR PROCEDURE
1. Raise the vehicle on a lift and make sure it is securely supported.
2. Depending on the inspection results, remove one or both rear wheel(s).
3. Disconnect the RTC actuator connectors and then remove the bracket mounting bolt.
Page 4 of 8
4. Remove the RTC actuator outer self-locking nut and washer.
5. Mark the position of the adjusting cam plate and adjusting bolt in reference to the frame.
6. Remove the inner self-locking nut, the adjusting cam plate, and the adjusting bolt.
7. Pry on the RTC actuator to remove it from the inner mount.
NOTE: Do not loosen or remove the lower arm bolts.
Page 5 of 8
8. Remove the RTC actuator from the vehicle.
9. Repeat steps 3 through 7 on the opposite side, if necessary.
10. Write down the seven-digit number ID of each new RTC actuator for the neutral position wheel memorization.
Page 6 of 8
11. Install the new RTC actuator.
12. Loosely reinstall the original adjusting cam plate using a new inner self-locking nut and new adjusting bolt.
NOTE: Align the cam positions of the new adjusting bolt and the adjusting cam plate with the marked positions on
the frame.
13. Loosely install the new outer self-locking nut and the original washer, while observing the correct orientation of the
washer in the image above.
Page 7 of 8
14. Install the new actuator harness bracket mounting bolt and torque it to 22 N·m (16 lb-ft), then reattach the actuator
connectors.
15. Tighten the actuator nuts and bolts until they are snug, but do not tighten to final torque at this time.
16. Repeat steps 10 through 15 on the opposite side, if necessary.
17. Install the rear wheel(s).
18. With the vehicle’s weight on the suspension, torque the new installed RTC actuator(s) inner nuts to 57 N·m (42 lbft).
19. With the vehicle’s weight on the suspension, torque the new installed RTC actuator(s) outer nuts to 59 N·m (44 lbft).
20. Connect the HDS to the vehicle and do the Rear Toe Position Sensor Neutral Memorization. Select Precision All
Wheel Steer > Replacement > Continue > Actuator > Right or Left. Then, enter the seven-digit number ID that
you wrote down in step 10.
NOTE: If both RTC actuators were replaced, repeat the Rear Toe Position Sensor Neutral Memorization for the
other side.
21. Do a wheel alignment.
22. Perform the following procedures:
•
VSA Sensor Neutral Position Memorization.
•
Steering Rack End Stop Position Learn.
END
Page 8 of 8
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