Warranty Extension: 2019-2020 Acura RDX MOST Bus Network Connectors

NHTSA ID Number: 10190296

Manufacturer Communication Number: B21-009

Summary

Service Bulletin – A loose connection in the MOST bus network is causing a popping or crackling from the speakers, a blank display, or no sound from the audio system. You may also see a Network Loss message, Center Display Unit Stays On with Ignition Turned to OFF and Door Open, display switches between the Day Mode and Night Mode, the Drive mode not available message appears, or Disclaimer is stuck on.

 


B21-009
April 9, 2021
Version 3

Warranty Extension: 2019-20 RDX MOST Bus Network Connectors

Supersedes 21-009, dated February 18, 2021, to revise the information highlighted in yellow.

 

AFFECTED VEHICLES

Year Model Trim Level VIN Range
2019-20RDXALLCheck the iN VIN status for eligibility.

 

REVISION SUMMARY

Under BACKGROUND, the miles were updated.

 

BACKGROUND

A loose connection in the MOST bus network is causing a popping or crackling from the speakers, a blank display, or no sound from the audio system. You may also see a Network Loss message, Center Display Unit Stays On with Ignition Turned to OFF and Door Open, display switches between the Day Mode and Night Mode, the Drive mode not available message appears, or Disclaimer is stuck on.

American HondaeBay logo is extending the warranty for the MOST bus network on these vehicles to 6 years or 74,000 miles from the original date of purchase, whichever comes first.

 

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

Install the FAKRA connector set.

 

PARTS INFORMATION

Part Name Part Number Quantity
Rear Pillar Trim Clip91561-TA5-A11eBay logo1
FAKRA Connector Set39817-TJB-AC0eBay logo3

 

TOOL INFORMATION

NOTE: The tool listed below is a required tool that should be in your dealer inventory. Order additional tools only if your tools are damaged and need replacement.

Tool Name Part Number Quantity
Straight FAKRA Puller07AAC-THRA2001

 

INSPECTION PROCEDURE

1. Check the software version in the audio unit. Go to the HOME screen and select, Settings, System. Scroll to About and select AcuraeBay logo Software System.

Is D.1.2.1 or higher displayed?

Yes – Go to step 2.

No – Using OTA, update the audio unit software to D.1.2.1 or higher, then continue with step 2.

 

2. Turn the ignition to ON, and on the touch pad, press and hold the Back, Home, and Cards List buttons at the same time. Hold until the Dealer Diagnostics menu screen appears in the primary information area. You will hear a tone when you release the buttons.

 

3. Using Touchpad A, select DETAIL INFORMATION & SETTING.

 

4. Scroll down the menu, and select SHUTDOWN REASON.

 

In this example, the cause of the failure can be identified as Meter:SUDDEN_SIGNAL_OFF.

 

5. Write down any failures as they will be collected on the warranty claim. Then, clear the data.

 

REPAIR PROCEDURE

1. Remove the dash side panel and air vent.

 

2. Remove the two screws.

 

3. Remove the lower trim, and disconnect the switch connectors and in-car temp sensor.

4. Remove the lower center cover to expose the infotainment unit.

 

5. Remove the two tie down hooks on the passenger side, then remove the load floor strip.

 

6. Remove the cargo floor lid, cargo bin, then the rear trim panel.

 

7. Remove the bolt from the rear seat cushion.

 

8. While pushing down on the rear seat cushion, pull the seat hook handles to release the hooks.

 

9. Pull back the seat cushion to pull the seat belt buckles from the slits in the seat cushion.

 

10. With rear seat heaters: Disconnect the connectors.

 

11. Remove the rear seat cushion.

 

12. Remove the lower trim.

 

13. Remove the rear passenger seat hinge cover by lifting it up.

 

14. Remove the inner handle cap.

 

15. Pull back and remove the lower side trim panel.

 

16. Remove the two screws.

 

17. Using a rubber mallet, apply a light blow to disengage the quarter pillar trim clip (a must-replace part). Then, remove the quarter pillar trim. Once it is removed, install a new quarter pillar trim clip.

 

18. With rear speaker: Disconnect the rear speaker from the upper quarter pillar trim.

 

19. Disconnect the red and green MOST connectors at the infotainment, stereo amplifier, and tuner units using the straight FAKRA puller. Do not pull on the units while the FAKRA connectors are connected to help prevent communication issues.

NOTE: To avoid mixing up the wires, remove only one FAKRA connector at a time.

 

20. Using a small flat-tip screwdriver, remove the secondary lock, then break off the tab as shown.

 

21. Pull and twist counterclockwise to remove the housing from the wire. Then, discard the housing and lock.

 

22. Select the correct color FAKRA housing, then slide the new terminal onto the wire until it clicks into place.

 

23. Line up the locking tabs of the FAKRA housing to the new terminal, then slide the new terminal into the housing until it clicks.

 

24. Repeat steps 20 thru 23 for the other connectors. Then, install the MOST connectors to the infotainment, amplifier and tuner units.

 

25. Install all the removed parts in the reverse order of removal. When installing the units, make sure the harness is routed correctly as a misrouted harness can put pressure on the connectors which may cause a connection issue. Do not pull on the units while the FAKRA connectors are connected to help prevent communication issues.

 

26. Test-drive the vehicle to confirm the repair. If the repair was not successful, continue with normal troubleshooting based on client symptom(s).

 

END

 


2 Affected Products

Vehicle

MAKEMODELYEAR
ACURAeBay logoRDX2019-2020

 


1 Associated Document

Manufacturer Communications

B21-009
April 9, 2021
Version 3

https://www.nhtsa.gov/recalls?nhtsaId=10190296

MC-10190296-0001.pdf 2982.6KB

 


NHTSA ID Number: 10187544

Manufacturer Communication Number: B21-009

Summary

Service Bulletin – A loose connection in the MOST bus network is causing a popping or crackling from the speakers, a blank display, or no sound from the audio system. You may also see a Network Loss message, Center Display Unit Stays On with Ignition Turned to OFF and Door Open, display switches between the Day Mode and Night Mode, the Drive mode not available message appears, or Disclaimer is stuck on.

 

1 Associated Document

Manufacturer Communications

B21-009
February 18, 2021
Version 1

https://www.nhtsa.gov/recalls?nhtsaId=10187544

MC-10187544-0001.pdf 3024.891KB

 


NHTSA ID Number: 10190300

Manufacturer Communication Number: ONLF9O04052021

Summary

“Owner Notification Letter – On some 2019 RDX models, a loose connection in the MOST bus network may cause the following:

-A popping or crackling from the speakers, a blank display, or no sound from the audio system

-Network Loss and/or Drive Mode Not Available Messages or the disclaimer message stuck on

-The center display staying on after turning the vehicle to the OFF mode with the door open

-Display switches between the Day Mode and Night Mode

On some 2020 RDX models, a loose connection in the MOST bus network may cause the following:

-A popping or crackling from the speakers, a blank display, or no sound from the audio system

-A Network Loss message

For vehicles that display any of the above respective symptoms, American HondaeBay logo is extending the warranty for the MOST bus network on these vehicles to 6 years or 72,000 miles from the original date of purchase, whichever comes first.”

 

1 Associated Document

Manufacturer Communications

Service Bulletin #21-009 Defect 6M100 / Symptom F9O00
April 2021

https://www.nhtsa.gov/recalls?nhtsaId=10190300

MC-10190300-0001.pdf 312.055KB

 


 

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