Programming Chassis Electronic Control Units (ECUs) With
DiagnosticLink
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional

Century Class Conventional
Argosy
Cargo
Columbia
122SD and Coronado

> Business Class M2
> Cascadia
> 108SD/114SD
> New Cascadia

54-308
Freightliner
Service Bulletin

Description of Revisions: This bulletin replaces the version dated
10/31/2019. Figures have been updated and steps have been
revised to clarify vehicle programming.

General Information
IMPORTANT: The process of reading and uploading parameters should not be performed if there are
parameters on the vehicle’s chassis ECUs that are not intended to be recorded in a service record.
Only one service record per ECU, per vehicle, will be stored on the server. Once a new service
record for an ECU is created, the old record is no longer available for download.
There are two different procedures for programming chassis ECUs with DiagnosticLink:
• Updating functioning vehicle chassis ECUs by uploading the parameters of the vehicle’s ECUs to the
server and then downloading these parameters with the updated software.
• Overwriting the parameters and software installed on the ECU with the most recent parameter sets and
software from the server by directly using ’Program Device’ in DiagnosticLink.
Retain the parameter information contained on a vehicle’s chassis ECU when the chassis ECU is functional. A
vehicle’s functioning ECUs should be considered the primary source for parameters. To retain parameters:
1. Read the current vehicle’s chassis ECUs parameters and upload them to the server in the ’Program Device’
window.
2. Then program the chassis ECU with updated software using ’Program Device.’ The parameters just
uploaded will be downloaded with the updated software.
Overwrite the parameters and software installed on the ECU when:
• performing the initial programming of a spare part ECU, or
• when attempting to recover an incorrectly parameterized ECU.
If upgrading an ECU to newer hardware when the current ECU is functional, do the following:
1. Read the current ECU parameters and upload them to the server in the ’Program Device’ window.
2. Install the new ECU hardware.
3. Overwrite the new ECU using ’Program Device.’
This will transfer the parameters from the old ECU to the new ECU.

Programming Chassis ECUs in DiagnosticLink
1. Park the vehicle on a level surface, shut down the engine, and apply the parking brakes. Chock the tires.
2. Connect the vehicle to DiagnosticLink. Make sure that DiagnosticLink is updated to the latest version (8.13
at the time of publication) or newer. To update DiagnosticLink, select ’Tools’ from the top menu and then
select ’Update’ from the dropdown menu. See Fig. 1.

Freightliner Service Bulletin, 02/24/2021

Page 1

54-308
Freightliner
Service Bulletin

Programming Chassis Electronic Control Units (ECUs) With
DiagnosticLink
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional

Century Class Conventional
Argosy
Cargo
Columbia
122SD and Coronado

01/15/2021

> Business Class M2
> Cascadia
> 108SD/114SD
> New Cascadia

f120507

Fig. 1, Updating DiagnosticLink to the Latest Version

2.1

When programming, we recommend configuring DiagnosticLink to connect only to ’Default’ ECUs.
To make this change in DiagnosticLink:
• Select ’Tools’ from the top menu, and then select ’Options’ from the drop down menu.
• Find and select the ’Connection’ tab. See Fig. 2.
• Select the ’Select Defaults’ button on the right side of the window, then select ’Apply.’

Page 2

Freightliner Service Bulletin, 02/24/2021

Programming Chassis Electronic Control Units (ECUs) With
DiagnosticLink
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional

Century Class Conventional
Argosy
Cargo
Columbia
122SD and Coronado

54-308
Freightliner
Service Bulletin

> Business Class M2
> Cascadia
> 108SD/114SD
> New Cascadia

1
2

3

02/01/2021

f120850

1. ’Connection’ Tab

2. ’Select Defaults’ Button

3. ’Apply’ Button

Fig. 2, Configuring DiagnosticLink to Connect to Default ECUs

3. Address any pre-existing conditions or fault codes.

NOTE: In DiagnosticLink an ECU is called a ’device.’
4. Select ’Program Device’ from the upper left-hand side of the window. See Fig. 3.

02/01/2021

f120466a

Fig. 3, Selecting Program Device (ECU)

Freightliner Service Bulletin, 02/24/2021

Page 3

54-308
Freightliner
Service Bulletin

Programming Chassis Electronic Control Units (ECUs) With
DiagnosticLink
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional

Century Class Conventional
Argosy
Cargo
Columbia
122SD and Coronado

> Business Class M2
> Cascadia
> 108SD/114SD
> New Cascadia

5. Remove any ’Request Pending’ downloads and serial numbers in the main window by selecting the
’Request Pending’ list item(s) and then selecting the ’Remove’ button on the right-hand side of the window.
Do not select ’Remove All;’ selecting ’Remove All’ deletes all data pending upload. See Fig. 4.

02/04/2021

f120463a

Fig. 4, Removing Pending Requests

6. Turn the ignition ON and allow time for all the default vehicle ECUs to connect. (Default vehicle ECUs are
listed on the bottom left-hand side of the window under ’Connections’ in Fig. 5.)

2
1

3

02/04/2021

f120839

1. ’Connections’ List
2. ’Parameters’

3. ’Reading parameters’ Progress Bar

Fig. 5, Connecting Default ECUs and Reading Vehicle Parameters on DiagnosticLink

7. If programming functional chassis ECUs, select ’Parameters’ on the upper left-hand part of the window and
then continue with the following substeps.

Page 4

Freightliner Service Bulletin, 02/24/2021

Programming Chassis Electronic Control Units (ECUs) With
DiagnosticLink
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional

Century Class Conventional
Argosy
Cargo
Columbia
122SD and Coronado

54-308
Freightliner
Service Bulletin

> Business Class M2
> Cascadia
> 108SD/114SD
> New Cascadia

If performing the initial programming of a spare part ECU or attempting to recover an incorrectly
parameterized ECU, continue with step 8.
7.1

DiagnosticLink will read the parameters of the vehicle’s connected ECUs. Wait until the ’Reading
parameters . . . ’ bar indicates this process is complete. See Fig. 5.

7.2

Select ’Program Device’ on the upper left-hand part of the window. There should be data to upload;
this data is the parameters of the vehicle’s ECUs that have just been read. Select the ’Connect to
Server’ button to upload the vehicle’s ECUs parameters to the server. See Fig. 6.

1

2

3

02/16/2021

f120840

1. ’Program Device’

2. ’Data to Upload’

3. ’Connect to Server’

Fig. 6, Uploading Parameters of Vehicle ECUs to the Server

7.3

Use your DTNAConnect information to connect to the server. Your sign-in to the server will remain
active until DiagnosticLink is closed. See Fig. 7.

Freightliner Service Bulletin, 02/24/2021

Page 5

54-308
Freightliner
Service Bulletin

Programming Chassis Electronic Control Units (ECUs) With
DiagnosticLink
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional

Century Class Conventional
Argosy
Cargo
Columbia
122SD and Coronado

01/14/2021

> Business Class M2
> Cascadia
> 108SD/114SD
> New Cascadia

f120845

Fig. 7, Login Window

7.4

Page 6

Select ’Add’ to add a download request for the vehicle by entering the vehicle identification number
(VIN). See Fig. 8.

Freightliner Service Bulletin, 02/24/2021

Programming Chassis Electronic Control Units (ECUs) With
DiagnosticLink
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional

Century Class Conventional
Argosy
Cargo
Columbia
122SD and Coronado

> Business Class M2
> Cascadia
> 108SD/114SD
> New Cascadia

01/15/2021

54-308
Freightliner
Service Bulletin

f120841

Fig. 8, Adding the VIN to Download Updated Server Data

7.5

Make sure the correct VIN and hardware information is populated in the window, then select ’OK.’
See Fig. 9.

Freightliner Service Bulletin, 02/24/2021

Page 7

54-308
Freightliner
Service Bulletin

Programming Chassis Electronic Control Units (ECUs) With
DiagnosticLink
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional

01/14/2021

Century Class Conventional
Argosy
Cargo
Columbia
122SD and Coronado

> Business Class M2
> Cascadia
> 108SD/114SD
> New Cascadia

f120842

Fig. 9, Verify VIN and Hardware Information

7.6

There should be a request pending status for the VIN. Select ’Connect to Server’ as shown in Fig.
10, to download the updated software and parameters for the vehicles ECUs.
The server will provide any new software that may be available for this vehicle’s default ECUs as
well as parameter sets based on the parameters that were just uploaded.
When the process is completed, go to step 9.

Page 8

Freightliner Service Bulletin, 02/24/2021

Programming Chassis Electronic Control Units (ECUs) With
DiagnosticLink
FLA COE
FLB COE
FLD Conventional