NHTSA ID Number: 10198183
Manufacturer Communication Number: B20-031
Summary
Service Bulletin – There is 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.
1 Affected Product
Vehicle
| MAKE | MODEL | YEAR |
ACURA | RDX | 2021 |
SYMPTOM
There is 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.
POSSIBLE CAUSE
There is a loose connection in the MOST bus network.
CORRECTIVE ACTION
Install the FAKRA connector set.
PARTS INFORMATION
| Part Name | Quantity | Part Number |
| Rear Pillar Trim Clip | 1 | 91561-TA5-A11 |
| FAKRA Connector Set | 3 | 39817-TJB-AC0 |
|
| ||
TOOL INFORMATION
| Tool Name | Part Number | Quantity |
| Straight FAKRA Puller | 07AAC-THRA200 | 1 |
INSPECTION PROCEDURE
1. 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.
2. Using Touchpad A, select DETAIL INFORMATION & SETTING
3. Scroll down the menu, and select SHUTDOWN REASON.
In this example, the cause of the failure can be identified as Meter:SUDDEN_SIGNAL_OFF.
4. 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.
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 units, make sure the harness is routed correctly because a misrouted harness can put pressure on the connectors, which can cause a connection issue. Do not pull on the units or MOST feeders while the FAKRA connectors are connected.
26. Test-drive the vehicle to confirm the repair.
SEOCONTENT-START
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.
© 2021 American Honda Motor Co., Inc. – All Rights Reserved Page 1 of 10
Service Bulletin
20-031
June 17, 2021 Version 7
Popping/Crackling from the Speakers; Display Blank
Supersedes 20-031, dated February 18, 2021, to revise the information highlighted in yellow.
AFFECTED VEHICLES
Year
Model
Trim Level
VIN Range
2021
RDX
ALL
ALL
REVISION SUMMARY
• Under AFFECTED VEHICLES, 2019–20 models were removed, refer to S/B 21-009, Warranty Extension: 2019-20 RDX MOST Bus Network Connectors
• Under AFFECTED VEHICLES, 2021 models were added.
• Under SYMPTOM, information was updated
• Under INSPECTION PROCEDURE, step 1 was updated.
SYMPTOM
There is 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.
POSSIBLE CAUSE
There is a loose connection in the MOST bus network.
CORRECTIVE ACTION
Install the FAKRA connector set.
PARTS INFORMATION
Part Name
Part Number
Quantity
Rear Pillar Trim Clip
91561-TA5-A11
1
FAKRA Connector Set
39817-TJB-AC0
3
TOOL INFORMATION
Tool Name
Part Number
Quantity
Straight FAKRA Puller
07AAC-THRA200
1
Page 2 of 10
WARRANTY CLAIM INFORMATION
Operation
Number
Description Flat Rate
Time
Defect
Code
Symptom
Code
Template
ID
Failed Part Number
0101Q5 Access the
infotainment, amplifier,
and tuner units, then
replace the affected
FAKRA connectors
(includes test drive).
1.4 hr 03214 03217 B20031B 39540-TJB-A01
Skill Level: Repair Technician
END
SEOCONTENT-END
NHTSA ID Number: 10186937
Manufacturer Communication Number: B20-001
Summary
Service Bulletin – Center Display Unit Stays On with Ignition Turned to OFF and Door Open
1 Associated Document
Manufacturer Communications
B20-001
February 6, 2021
Version 2
NHTSA ID Number: 10186938
Manufacturer Communication Number: B20-031
Summary
Service Bulletin – There is 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, the center display staying on after turning the vehicle to the OFF mode with the door open, or the disclaimer message stuck on.
1 Associated Document
Manufacturer Communications
B20-031
February 6, 2021
Version 4
MC-10186938-0001.pdf 2813.371KB
NHTSA ID Number: 10187295
Manufacturer Communication Number: B20-031
Summary
Service Bulletin – There is 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, 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, the Drive mode not available message appears, or the disclaimer message stuck on.
1 Associated Document
Manufacturer Communications
A20-031
February 10, 2021
Version 5
MC-10187295-0001.pdf 2811.267KB
NHTSA ID Number: 10187542
Manufacturer Communication Number: B20-031
Summary
Service Bulletin – There is 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, 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, the Drive mode not available message appears, or the disclaimer message stuck on.
1 Associated Document
Manufacturer Communications
B20-031
February 18, 2021
Version 6
MC-10187542-0001.pdf 2944.364KB
1 Associated Document
Manufacturer Communications
B20-031
June 17, 2021
Version 7
MC-10198183-0001.pdf 3467.277KB
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