NHTSA ID Number: 10190985
Manufacturer Communication Number: SB54-322
TSB/Document Date: 2021-04-28
Summary
Updated Freightliner
Service Bulletin for Adjusting Automatic Temperature Control Range with Optimized Idle. This bulletin replaces the version dated 12/06/2019. Tables 3 and 4 have been updated. Steps to change and match HVAC desired settings have been updated.
Cascadia
108SD/114SD
> New Cascadia
f120507
Fig. 1, Updating DiagnosticLink to the Latest Version
IMPORTANT: Before performing this procedure, make sure to address any pre-existing conditions or
fault codes first.
3. Select "Program Device." See Fig. 2. If there are any items in the section "Request Pending" downloads,
they should be removed. To remove them, select the "Request Pending" list item, then press the "Remove
All" button. See Fig. 3.
02/01/2021
f120466a
Fig. 2, Program Device Screen
Page 4
Freightliner Service Bulletin, 04/19/2021
Adjusting Automatic Temperature Control Range with
Optimized Idle
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
54-322
Freightliner
Service Bulletin
f120463
Fig. 3, Removing Pending Requests
4. Once all controllers are connected, read the vehicle parameters. See Fig. 4.
12/17/2020
f120455
Fig. 4, Reading Vehicle Parameters on DiagnosticLink
5. Select "Program Device." There should be data to upload. Click "Connect to Server" to upload vehicle
parameters to the server. See Fig. 5.
Freightliner Service Bulletin, 04/19/2021
Page 5
54-322
Adjusting Automatic Temperature Control Range with
Optimized Idle
Freightliner
Service Bulletin
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
1
2
12/14/2018
1. Program Device
f120456
2. Connect to Server
Fig. 5, Uploading Vehicle Parameters
6. Click "Add" to add a download request for the vehicle. See Fig. 6.
12/14/2018
f120457
Fig. 6, Adding the VIN to Download Updated Server Data
7. Make sure the correct VIN and hardware is populated, then click OK. See Fig. 7.
Page 6
Freightliner Service Bulletin, 04/19/2021
Adjusting Automatic Temperature Control Range with
Optimized Idle
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional
Century Class Conventional
Argosy
Cargo
Columbia
122SD and Coronado
Freightliner
Service Bulletin
Business Class M2
Cascadia
108SD/114SD
> New Cascadia
12/11/2018
54-322
f120458
Fig. 7, Verifying Correct VIN Hardware
8. There should be a request pending status for the VIN. Click "connect to server" to download the updated
unit data. See Fig. 8. The server will provide any new software available on the server as well as updated
parameter sets for the new software, adjusted for the parameter set that was just uploaded from the
vehicle.
Freightliner Service Bulletin, 04/19/2021
Page 7
54-322
Freightliner
Service Bulletin
Adjusting Automatic Temperature Control Range with
Optimized Idle
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
12/14/2018
f120459
Fig. 8, Downloading Updated Unit Data
9. Once the data has been downloaded, click "Next". See Fig. 9.
12/14/2018
f120460
Fig. 9, Clicking Next
NOTE: This new logic prevents nuisance engine starts, giving the operator more control.
10. Update HVAC_R01T and HVAC_F01T to the "Newest" software level, 18.44.1. If "Newest" is not available,
the ECU may already have the correct software. Verify that the software version is 18.44.1, or higher, in
DiagnosticLink Identification. See Fig. 10.
Page 8
Freightliner Service Bulletin, 04/19/2021
Adjusting Automatic Temperature Control Range with
Optimized Idle
FLA COE
FLB COE
FLD Conventional
Business Class
FLC 112 Conventional
Century Class Conventional
Argosy
Cargo
Columbia
122SD and Coronado
Freightliner
Service Bulletin
Business Class M2
Cascadia
108SD/114SD
> New Cascadia
10/15/2019
54-322
f120598
Fig. 10, Verifying the Software Level
IMPORTANT: After a programming, some fault codes may become active and some ECUs may not
auto connect. Cycling the ignition may clear the faults and connect the ECUs.
11. Turn the ignition to the OFF position, unplug and restart DiagnosticLink, and wait one minute.
12. Cycle the ignition 3 times, waiting 30 seconds between key off and key on.
13. Turn the key to the ON position and connect the vehicle to DiagnosticLink.
14. Go to "Actions" and select "ICUC Automatic Configuration." Click "Start."
15. Turn the ignition to the OFF position, unplug from the diagnostic port, and start DiagnosticLink. Wait one
minute.
16. Connect DiagnosticLink, turn the key to the ON position. Clear inactive faults, and troubleshoot any active
faults.
17. To maintain pairing of the rear and front HVAC controllers, both the front and rear parameters
Par_HVAC_Controller_Hysteresis need to be set the same. Select the desired temperature range for the
rear HVAC as shown in Fig. 11. After making the change, set the same temperature range for the Front
HVAC as shown in Fig. 12. See Table 4 for pairing values.
10/15/2019
f120599
Fig. 11, Changing the Rear HVAC Hysteresis to the Desired Setting
Freightliner Service Bulletin, 04/19/2021
Page 9
54-322
Freightliner
Service Bulletin
Adjusting Automatic Temperature Control Range with
Optimized Idle
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
03/10/2021
f120599a
Fig. 12, Changing the Front Hysteresis to Match the Rear Hysteresis Setting to Maintain Pairing
18. Change parameter Par_HVAC_Controller_Lo_Temp_set_R01T to the desired setting as shown in Table 2.
See Fig. 13.
10/15/2019
f120600
Fig. 13, Changing the Rear Temperature Setting to the Desired Setting
19. Change parameter Par_HVAC_Controller_Lo_Temp_Set on HVAC_F01T to desired settings to match
HVAC_R01T setting. See Fig. 14.
Page 10
Freightliner Service Bulletin, 04/19/2021
Adjusting Automatic Temperature Control Range with
Optimized Idle
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
54-322
Freightliner
Service Bulletin
03/10/2021
f120601
Fig. 14, Changing the Front Temperature Setting to Match the Rear Desired Setting
20. After arming Optimized Idle, a 3 minute delay is imposed before the HVAC system will implement comfort
criteria.
21. If the outside temp is relatively hot (10°F above the set-point), conditions for OI heat start request must be
present for 20 minutes before engine start is made.
22. If outside temperature is relatively cold (10°F below the set-point), conditions for OI Cool Start request must
be present for 20 minutes before engine start request is made. Adjusting front HVAC controls in OI mode
will revert front HVAC to COTC Mode for 10 minutes.
NOTE: An extremely large temperature offset of 15°F above or below the set point will bypass the
20-minute delay indicated in steps 21 and 22, but not the 3-minute delay noted in step 20.
Warranty
This is an informational bulletin only. Warranty does not apply.
Freightliner Service Bulletin, 04/19/2021
Page 11
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TSB/Document ID: SB54-322
Replacement Service Bulletin Number:
MFR Communication Date: 2021-04-26
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
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