TECHNICAL SERVICE BULLETIN
DEPARTMENT OF COMPLIANCE

VEHICLE SAFETY AND RECALL MANAGEMENT
BUILDING 11
423 N MAIN ST
MIDDLEBURY, INDIANA 46540-9218

Technical Service Bulletin: 225-1396

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Integrity

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Safety

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Quality

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Customer Service
August 2021

This Notice applies to your vehicle VIN listed above.
Dear Forest River Customer,
Forest River is alerting you to an issue involving certain 2021 Coachmen Nova Class B recreational vehicles. Please see
the information below which describes the issue and provides you with details on the steps you should take to have your
vehicle repaired.
WHAT IS THE ISSUE?
The "TRUTANK" holding tank monitor incorrectly indicates the wrong fill level of the holding tanks.
OWNERS: WHAT SHOULD YOU DO?
Please contact your dealer without delay and request a service appointment to schedule the free repair. The vehicle
Owner is responsible for making arrangements to have the work completed. Please state you have been notified by
Forest River of the issue and provide the TSB number (located at the top of this page) to the dealership. It is also helpful
to give the dealership a copy of this letter when you take your vehicle in for the repair. You may visit
www.forestriverinc.com to search for dealer locations.
HOW LONG WILL THE REMEDY PROCESS TAKE?
The estimated time of repair is .75 hours. However, the dealership may need to keep your vehicle or schedule an
appointment with you for a later date to fit into their regular service schedule.
DEALERS: WHAT SHOULD YOU DO?
Dealer Service Procedures are locate on Dealer Connect. Contact information for FireFly is listed on the remedy
instructions to order the kit.
MAY FOREST RIVER ASSIST YOU FURTHER?
CONTACT
PHONE
FIREFLY CUSTOMER SERVICE
(574) 825-4600
NOVA CLASS B MOTORHOMES
(574) 825-6319
TSB
NUMBER
225-1396

REPAIR CODE

DESCRIPTION

TIME

SB-666-15-00-004087

COMPLETE REMEDY PER INSTRUCTIONS

.75 HRS

WHAT IF YOU HAVE PREVIOUSLY PAID FOR REPAIRS TO YOUR VEHICLE FOR THIS PARTICULAR CONDITION?
If you have already paid for a repair that is within the scope of this service bulletin, you may be eligible for a refund of
previously paid repairs. Refunds will only be provided within the scope of this Technical Service Bulletin.
Please send the service invoice to the following address:
Nova Class B
Forest River, Inc.
Attn: WARRANTY MANAGER
423 N Main St
Middlebury, IN 46540

Sincerely,
Forest River, Inc.
Office of Corporate Compliance

Page 1 of 1

TECHNICAL SERVICE BULLETIN 225-1396 REMEDY INSTRUCTIONS
Make(s): NOVA CLASS B MOTORHOME
Model(s): NAB20C
Model Year(s): 2021
Concern:
The "TRUTANK" holding tank monitor
incorrectly indicates the wrong fill level of
the holding tanks.

Repair Code: SB-666-15-00-004087
Allotted Time: .75 HRS.
Inspection Code: N/A
Allotted Time: N/A
Photo(s) Required: NO
Prior Authorization Required: NO
Part(s) Number: 990-V7.13-225-1396
Part(s) Return: NO

Disconnect the vehicles’ battery Positive and Negative, disconnect any House battery(s) Positive and Negative, if equipped
with a generator ensure it is off and lastly, ensure the vehicle is disconnected from shore power. Block any tires/wheels to
prevent the vehicle from rolling. Failure to do so may result in electrocution, fire or other personal injury, property damage
and/or death.
Please note that this update process requires Bootloader 2V0 touchscreens. Please follow the Screen Removal
Procedures below to ensure that your touchscreen is labeled Bootloader 2V0 as shown. If it is not, please contact:
Firefly Integrations Technical Support Phone: (574) 825-4600 or Email:[email protected]
Tools needed:
•
Wire stripper
•
Crimping tool
•
Screw gun
•
Small Uni-mate De-pinner tool (optional)

Parts required:
•
J11 connector 770583-1 (optional with de-pinner tool)
•
6” 18awg Black uni-mate pigtails
•
WAGO, or Bell cap (Scotch-locks are not acceptable)

Procedure:
•
Disconnect the battery by selecting “Store” on the USE/STORE switch.
•
Access J11 connector at the Firefly G12 Board, located behind the main switch board.
•
Verify/Correct the J11 wiring pinout by de-pinning and re-locating wires, or by replacing the entire connector.
•
Plug the J11 connector back into the G12, reinstall switch panel, and Press “USE” on the USE/STORE switch.
•
Perform the Firefly USB Flash Drive Updating procedure.
•
Once updated, Go to Settings Tab on the Firefly touch screen.
•
Press and Hold the Floorplan box until the screen changes to the floorplan menu. Choose a floorplan other than the current floorplan
selected. Wait 2 seconds, then choose the correct/original floorplan. This is refresh the TruTank program.
•
Go to the Home Tab on the Firefly Touch screen.
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Press and hold the Tank level bars for 30+ Seconds until the screen changes to TruTank diagnostic menu.
•
Look at the “Status:” for each sensor.
o
Valid - OK
o
Invalid – double check J11 Pinout, check wiring at Trutank sensor(red-to-yellow, black-to-blue), Check sensor plumb(+/- 5°)
o
Initializing – Add water to Tank, should switch to Valid.
o
Sensor Error – Faulty Trutank sensor or disconnected wiring.

Page 1 of 1

USB Flash Drive Updating
Please note that this update process requires Bootloader 2V0 touchscreens. Please follow the
Screen Removal Procedures below to ensure that your touchscreen is labeled Bootloader 2V0
as shown. If it is not, please contact:
Firefly Integrations Technical Support
(574) 825-4600
[email protected]

Bootloader Version.

USB Port.
USB Flash Drive

Screen Removal Procedure
Place your fingers along the top of the screen and apply
pressure “down and out” to “pop” the screen out of the wall
mount.
To Reinstall - line the screen back up with the wall mount
and apply pressure to “snap” the screen back onto the wall
mount.

Press down and pull out.

USB Flash Drive Update Procedure
Please note that your Firefly system will reset during the update which will cause all coach lighting to turn
off. You may wish to use a flashlight for additional lighting during the update.

1

Remove the touchscreen from the wall.
Be careful not to drop the touchscreen once it breaks free from the wall mount.

2

Plug the Flash Drive into the USB Port on the back of the Touchscreen. Next, unplug the network cable
from the touchscreen for up to 5 seconds, then plug it back in.

Network Cable
2

3

4

5

6

Once the touchscreen boots back up, tap Manual Load.

Several updates may be required. Tap the first required
config update to begin the installation process (skip any that
say No Update Required). Once the status for the first
required update changes to Update Successful, repeat this
process for any remaining updates.

4

Once all configs have been Updated Successfully, tap Exit.
Now, remove the Flash Drive from the screen and perform a
power cycle once again.

To verify the update, check your GUI and/or LC versions on the
Settings page to ensure that they match what is listed on the
flash drive’s label (label not shown). If they do not, perform the
entire procedure again.
6

7

3

GUI Version: 3.11

5

Logic Controller Version: 3.11

Reinstall the touchscreen (apply pressure to the corners to “snap” it back on the wall mount). The update
is now complete.