Service Bulletin

19-021

April 5, 2019

Version 1

Metallic Buzz or Rattle Under Vehicle
AFFECTED VEHICLES
Year

Model

Trim

VIN Range

2016-18

HR-V

ALL AWD

ALL

SYMPTOM
While driving at speeds between 20 and 55 mph (engine speeds between 2500 and 3500 rpm), you may hear a
metallic buzz or rattle (similar to a heat shield rattle) from under the vehicle when gently letting up on the accelerator
pedal.
POSSIBLE CAUSE
This noise is not a durability problem, but rather a drivetrain system vibration. To fix this issue, there is software to
reduce the chance of this noise from occurring.
CORRECTIVE ACTION
Test-drive the vehicle. Then, confirm that the noise is similar to the sound clip in INSPECTION PROCEDURE. If the
sound is similar, update the AWD control unit software.
WARRANTY CLAIM INFORMATION
The normal warranty applies.
Operation
Number

Description

Flat Rate
Time

Defect
Code

Symptom
Code

Template
ID

Failed Part Number

2195B1

Update the AWD unit.

0.2 hr

03214

04201

A19021A

48311-54A-3050

A

Test-drive the vehicle.

0.2 hr

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.
©

2019 American Honda Motor Co., Inc. — All Rights Reserved

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SOFTWARE INFORMATION
NOTE
Unnecessary or incorrect repairs resulting from a failure to update the i-HDS are not covered under warranty.
i-HDS Software Version: 1.004.064 or later
J2534 Software Information:
•

PC Application Version 1.1.0.6 or later

•

Database update 04-MAR-2019 or later

Before beginning the repair, make sure that both the i-HDS and J2534 software are updated as listed above.
Do only the update listed in this service bulletin.
You cannot apply the updates with the MVCI as a standalone tool. To update the software you must use the MVCI
or the DST-i interface in conjunction with the J2534 Rewrite PC application on the i-HDS.
For more information about updating the i-HDS, the MVCI, and vehicle systems, refer to Service Bulletin 01-023,
Updating Control Units/Modules.
Year/Model

Software
System

Program ID (or later)

Program P/N (or later)

2016-18 HR-V

AWD

4A3050

48311-54A-305

INSPECTION PROCEDURE
1. To duplicate the noise, drive at speeds between 20 and 55 mph (engine speed between 2500 and 3500 rpm), then
gently let up on the accelerator pedal.
2. Listen for a noise, and compare it to the sound clip here.
•

If it is similar, go to REPAIR PROCEDURE.

•

If it is not similar, this bulletin does not apply. Continue with normal system troubleshooting.

REPAIR PROCEDURE
1. Update the AWD software using the i-HDS J2534 rewrite software with the MVCI or DST-i. Refer to Service Bulletin
01-023, Updating Control Units/Modules.
NOTES
•

Connect a fully charged jumper battery to the vehicle, and leave it connected during the entire procedure to maintain
steady voltage.

•

You cannot update the vehicle using the MVCI as a standalone tool.

•

Do not use the MongoosePro VCI tool.

•

Never turn the ignition to OFF or ACCESSORY during the update. If there is a problem with the update, leave the
ignition turned to ON.

•

To prevent AWD control unit damage, do not operate anything-electrical (headlights, audio system, brakes, A/C,
power windows, door locks, etc.) during the update.

END

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