EMISSIONS RECALL
CONVENTIONAL DCU AND ECU SOFTWARE
ENHANCEMENT

CAMPAIGN NO: AACY0
DATE: 2-14-2019
REFERENCE: QA-190212-N1

SUBJECT VEHICLES: 18MY-20MY Conventional trucks equipped

with a J08 engine

Note: Refer to the appropriate Vehicle Identification Number
in the warranty system to determine vehicle eligibility.
5. Handling of Dealership Inventory
Under 40 Code of Federal Regulations § 1068.101, a dealer cannot
sell, offer for sale, or introduce or deliver for introduction in interstate
commerce a new motor vehicle when it is aware that the vehicle does
not comply with an applicable Federal Motor Vehicle Safety Standard
or contains a defect related to motor vehicle safety. A civil penalty of
up to $44,539 may be assessed for each engine or piece of equipment
in violation. In addition, 49 Code of Federal Regulations §577.13
requires us to provide the following advisory: It is a violation of
Federal law for a dealer to deliver a new motor vehicle or any new or
used item of motor vehicle equipment (including a tire) covered by
this notification under a sale or lease until the defect or
noncompliance is remedied.
We request your assistance to ensure involved vehicles are identified
and not delivered prior to performing the remedy.
OVERVIEW:

Software updates are required for the Engine ECU (Engine
Control Unit) and DCU (Dosing Control Unit) modules. These
updates are intended to address the following items.
1) DPF Feedback Monitor (P24A1 or P24A0)
2) SCR Feedback Monitor (P2BAE)
3) Urea Tank Heater Valve Stuck Open Monitor (P20B2)
4) All Injector (#1-#6) Misfire (P0300)

BEFORE YOU BEGIN:
• Read and understand all instructions and procedures before you begin
the work.
• Read and follow all NOTICES, WARNINGS, and CAUTIONS set forth
in this publication. These alerts help to avoid damage to components,
serious personal injury, or both.
• Park the vehicle on a level and solid surface and apply the parking
brake.
• Confirm the engine is stopped, the starter switch is in the off (LOCK)
position, and the key is removed.
• Wear safety glasses to prevent eye injuries.
• Place wheel chocks in front of and behind all wheels.
•
•

NOTICE: Before beginning these procedures, you MUST install a
battery charger on the vehicle to ensure battery power does not go low
during reprogramming.
NOTICE: Before beginning these procedures, you also MUST be
certain that the laptop battery is fully charged, or a remote AC power
supply is connected to the laptop to ensure the battery power does not
go low during reprogramming.

VEHICLE PREPARATION:
1. Park the vehicle on a flat, level and solid surface.

2. Confirm the engine is stopped, the ignition switch is in the off (LOCK)
position, and the key is removed.

3. Apply the parking brake.

4. Chock all of the wheels.

Engine ECU Software
Part Number

Model
Year

Engine Series

Quantity

89663-E4027A

2018

J08EWU

As Required
By VIN

89663-E4036A
89663-E4626
89663-E4635

J08EVB
2019,
2020

J08EWU
J08EVB

DCU Software
Part Number

Model Year

Quantity

89550-E0445

2018, 2019,
2020

As Required By VIN

PC PREPARATION
PC Power Management
CAUTION: Disable the computer features listed below. Failure to disable
these features may severely damage the vehicle’s control modules.
1. Screen saver
2. Energy saving features
a. Monitor
b. Hard disks
c. System standby

NOTICE: The illustrations above depict what you will see on your computer
screen with regard to the features which must be disabled. The location on
the screen of the features to be disabled will vary, however, based upon the
operating software. Consult your IT (Information Technology) department
as required.

DCU & ECU REPROGRAMMING PROCEDURE
CAUTION: Two modules will be reprogrammed during this procedure. A
battery charger MUST be installed on the vehicle to ensure battery power
does not go low during reprogramming or damage to these modules may
occur. Do not begin this procedure until you install the battery charger.

1. Prepare a DXII compatible interface, such as the Denso DST-i or the

Nexiq USB Link 2 to perform this reprogramming procedure.
To assemble the interface cable, perform the following steps.
(1) Connect the DLC (Diagnostic Link Connector) cable to the interface.
(2) Connect the USB Cable to the interface.
(3) Connect the USB connector to the USB port on your computer.

2. Connect the DLC cable to the vehicle’s DLC connector. The DLC

connector is found under the dash on the left side of the steering column.

3. On your computer, locate the “Hino DX2” icon and open it.

4. Hino DX2 will prompt you for a “User ID” and “Password”. Enter your

User ID, and password and then select the “Login” icon. Verify that the DX2
has software version 1.1.19.2 or later.

5. Insert the ignition key into the starter switch and turn the key to the

“ON” position.

6. Select the “Reprogramming” icon.

7. Select “600 Series” under the “Vehicle Classification” drop down menu.

8. Select “DCU (Doser)” under the “System Classification” drop
down menu and then select the “OK” icon.
9. Follow the prompts to update the DCU to the latest software
level using the Hino Diagnostic eXplorer II (Hino DX2). Refer to
the following table for the appropriate software part number for
the application.
DCU Software
89550-E0445

2018, 2019, 2020

As Required By VIN

10. Once DCU reprogramming is complete, turn the starter
switch to the “LOCK” position and remove the key for one minute.

11. After waiting one minute, insert the ignition key into the
starter switch and turn the key to the “ON” position.

12. Again, select the “Reprogramming” icon.

13. Select “600 Series” under the “Vehicle Classification” drop down
menu.

14. Select “Engine J-Series” under the “System Classification” drop down

menu and then select the “OK” icon.

15. Follow the prompts to update the engine ECU to the latest software

level using the Hino Diagnostic eXplorer II (Hino DX2). Refer to the
following table for the appropriate software part number for the application.
Engine ECU Software

16. Once ECU reprogramming is complete, turn the starter switch to the
“LOCK” position and remove the key for one minute.

17. After waiting one minute, insert the ignition key into the starter switch

and turn the key to the “ON” position.

18. During ECU software reprogramming, other DTC’s may have been

set. These DTC’s will need to be cleared prior to completing this campaign.
Select the “Diagnosis” icon.

19. Check mark the “Device Classification”. This should automatically
check mark the remaining devices. Select the “Read Out” icon.

20. Select the “Delete All” icon.

21. Select the “Delete” icon.

22. Select the “OK” icon.

23. From the Engine ECU Data Monitor and Active Test menu, select

Active Test Setting>Urea SCR Related Memory Reset> then follow the
prompts to complete the reset.

24. Select the “New Diagnosis” icon.

25. Select the “OK” icon.

26. Turn the starter switch to the “LOCK” position and remove the key.

REPAIR LABEL INSTALLATION PROCEDURE
Once all above steps in this recall procedure have been
completed, apply a recall label to the left door jamb above the
VIN label. Fill in the Campaign No, Dealer code, and Repair date.
Proceed to the Final Inspection Procedure, below.

CALIFORNIA VEHICLES ONLY:
When an Emissions Recall is performed by a California Dealer a “Proof of
Correction” certificate must be completed and provided to the vehicle
owner to submit to the California Department of Motor Vehicles if requested
during vehicle registration. If the “Proof of Correction” certificate is not
provided, an owner may not be able to renew the vehicle registration. If not
requested by the DMV, the form should be retained for the Owner’s
records. A downloadable form can be found on Hinonet/ Service/ Print
Forms under the description “Proof of Correction”.

FINAL INSPECTION:
•
•

•

The Engine ECU and DCU module software were updated to the latest
levels as outlined by this recall procedure.
When reprogramming, DTC’s may have inadvertently been set. Make
certain that all codes logged as a result of the ECU reprogramming
have been cleared from the Engine ECU, Transmission ECU, ABS ECU
and DCU prior to releasing the truck back to the customer.
The Urea SCR Related Memory Reset was performed.

CLAIM APPLICATION
Conventional ECU and DCU Reprogramming:
a) Campaign No: AACY0
b) Labor charge: 1.2 hrs.
c) Warranty code: 86311
d) Trouble code: 98
e) Operation code: 86350AOT
f) Original failed part: 9999999999