NHTSA ID Number: 10172007
Manufacturer Communication Number: A20-021
TSB/Document Date: 2020-03-03
Summary
Service Bulletin - The HFL
system freezes during or after a phone call.
Service Bulletin
20-021
February 28, 2020
Version 1
Bluetooth® HandsFreeLink® (HFL) Freezes During or After A Call
AFFECTED VEHICLES
Year
Model
VIN Range
2019-20
Civic
LX (2-Door and 4-Door)
ALL
SYMPTOM
The HFL system freezes during or after a phone call.
PROBABLE CAUSE
Some audio units are not updated with the latest software.
CORRECTIVE ACTION
Update the audio unit software.
WARRANTY CLAIM INFORMATION
The normal warranty applies.
Operation
Number
Description
Flat Rate
Time
Defect
Code
Symptom
Code
Template
ID
Failed Part Number
0100A1
Update the audio unit
software.
0.3 hr
03214
03217
A20021A
39171-TBA-A41
Skill Level: Repair Technician
CUSTOMER 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 Honda automobile dealer.
©
2020 American Honda Motor Co., Inc. — All Rights Reserved
Page 1 of 6
REPAIR PROCEDURE
Software Update Procedure
1. Connect a fully charged jumper battery to the vehicle, and leave it connected during the entire update procedure to
maintain steady voltage.
2. Open the Honda Firmware Downloader from the shop's computer.
NOTE
Refer to job aid Honda Firmware Downloader for more information.
3. Insert a USB flash drive into the computer.
NOTE
Make sure the USB flash drive is empty and is formatted to FAT32.
4. Enter this service bulletin number, the VIN of the vehicle you are working on, and select Search.
5. When the software is found, select the Download icon. Once the download is complete, remove the USB flash drive
and take it back to the vehicle.
NOTE
The software download may take up to 10 to 15 minutes depending on the size of the file and the internet speed.
You do not need to stay with the vehicle during this download.
Page 2 of 6
6. Turn the ignition to ON.
7. Before updating the software, write down the customer's audio unit presets.
8. First, verify the software information. With the audio turned off, press buttons 1, 3, and 5, then press the VOL/Power
knob on the audio unit in the order shown.
Page 3 of 6
The Version display screen will appear.
Only update the audio unit software if the software information matches the information shown above and listed
below. If the software information does not match the information shown, no update is needed and continue with
normal system troubleshooting.
NOTICE
Updating the software when the software information does not match what is shown will damage the unit. If that
happens, you will need to replace it.
Software Details
Original Software Version
2019/2020 Civic
System ucom
GA04
HMI ucom
G004
DSP ucom
11C20204
Bluetooth module
HW02-SW03.29.07
9. Press the VOL/Power knob to exit the Version display screen.
Page 4 of 6
10. Turn off the audio unit, then insert the USB flash drive into the USB port. The audio unit will automatically detect the
USB flash drive and start the update. When the update starts, the screen will go black, the buttons will start blinking,
and the audio unit will beep.
NOTE
If the update does not automatically start, or an error occurs, cycle the ignition to reset the audio unit. Then, go back
to step 9.
11. Once the update is complete, you will hear a long beep, the Honda logo will appear, and the screen will return to the
audio screen.
Page 5 of 6
Verifying the Audio Unit Software
1. With the audio unit turned off, press buttons 1, 3, and 5, then press the VOL/Power knob on the audio unit in the
order shown.
The Version display screen will appear.
Make sure the software information matches the information shown above and listed below.
Software Details
Valid Original Software Version
2019/2020 Civic
System ucom
GB04
HMI ucom
G004
DSP ucom
11C20204
Bluetooth module
HW02-SW03.29.07
2. Press the VOL/Power knob to exit the Version display screen.
3. Remove the USB flash drive.
4. Set the clock to the correct time.
5. Press and hold the VOL/Power knob to skip the security code screen.
6. Restore the customer's audio unit presets.
END
Page 6 of 6
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TSB/Document ID: A20-021
Replacement Service Bulletin Number:
MFR Communication Date: 2020-02-28
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
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