NHTSA ID Number: 10200951
Manufacturer Communication Number: KC-2049
TSB/Document Date: 2021-09-03
Summary
AMT-F Transmission Electronic Control Unit (TECU) Software (MSW) Information – Improvement List (Change Log) And Explanations For Issues And Diagnostic Trouble Codes (DTC, Fault Codes) From Start of Production to Present
8/30/2021
Article
AMT-F Transmission Electronic Control Unit (TECU)
Software (MSW) Information – Improvement List
(Change Log) And Explanations For Issues And
Diagnostic Trouble Codes (DTC, Fault Codes) From
Start of Production to Present
Software Release Tables
This document covers ALL North American AMT-F gearbox software. The
Transmission Electronic Control Unit (TECU) software and gearbox
production does not follow an Emissions release schedule like the Engine
Control Module (EMS), so the Production Start Date and Build Date of the
chassis should be used here to find the appropriate software table. Using
a known Main Software (MSW) number, the tables below can be used to
determine any improvements that have been made compared to
previous versions, as well as further changes that have been made in
newer versions.
If the MSW number currently shown to be installed on the vehicle is not
on the table, contact Tech Support if more information is needed.
This document will be updated as new SW becomes available.
Build Date Location
For Volvo trucks
, the Build date can be found on the sticker on the BPillar. The Transmission model is on the B-Pillar on the Vehicle
identification sticker.
1/11
8/30/2021
Article
2/11
8/30/2021
Article
Mack Vehicles can find the build date on the edge of the drivers door.
3/11
8/30/2021
Article
Mack and Volvo Chassis With AMT-F Version
Gearboxes Installed In Trucks Built Between
November 2016 and November 2019
AT2612F, ATO2612F, ASO-C, ASO-ULC, UASO,
US17/US18
Software
Part
Number
(MSW)
24147627
23647591
Release Notes
Improved clutch timing where the clutch releases
slowly from the idle drive position and when
stopped in gear when the brake pedal is depressed.
Improve engagement of split neutral gears to
secure lubrication.
4/11
8/30/2021
Software
Part
Number
(MSW)
23344747
Article
Release Notes
Improve idle drive when pressing brake pedal or
using accelerator with a fleet shifter and no shift
buttons. Allows up shifting and downshifting
while in 'Idle Drive' on vehicles with fleet shifters.
Changed the default value for P1ALV-Road Speed
Limit, Legislated to prevent 'Inconsistent'
parameters error when reading parameters in
Tech tool.
Split shaft PTO functionality implemented for
Mack MRU concrete pumpers with AMT
gearboxes.
Improved monitor for fault P1052-18 OC for
clutch position sensor.
Add possibility to heal DTC P10AE81 if slip point is
not calibrated.
New Parameters make it possible to have C1 or
C2 as the highest start gear in Manual and
Automatic:
P1LCM Highest start gear in Automatic
mode (12spd gearbox)
P1LCL Highest start gear in Manual mode
(12spd gearbox)
P1RP9 Start Gear Selection, Automatic
Mode, Highest Gear (14 spd gearbox)
P1RQA Start Gear Selection,Manual Mode,
Highest Gear (14 spd gearbox)
P1RQB Start Gear Selection,Automatic
Mode, Highest Gear (13 spd gearbox)
P1RQC Start Gear Selection,Manual Mode,
Highest Gear (13 spd gearbox)
5/11
8/30/2021
Software
Part
Number
(MSW)
Article
Release Notes
Solved problems:
23263953
Missing manual shift disable parameter (disable
buttons). Disables shift buttons on Premium shifter.
The automated selection of reverse start gear will
not select RC as frequently.
Changed SW to not try and disengage clutch in Key
on-engine off when no air supply, to reduce noise
from CVU.
Grinding PTO. Corrected an issue when switching
between PTO1 and PTO2 quickly or at vehicle
startup when the vehicle is shut down with PTO
engaged.
New parameter:
P1Q9C, to disable idle drive while in reverse.
Allowed by default, changeable with Tech tool.
Remote Software Download:
23090996
Changed clutch calibration DTC to not set at
startup after SWDL.
Send out new signal for IC to display when when
calibration is on-goingto implement Clutch
calibration pop-up.
Changed engaged gear in Neutral to be saved
over SWDL.
Save inclination sensor offset over SWDL.
Other Improvements:
AMT Clutch error MID 130 PSID27 FMI 8/P107538
Fault limit improvements to help prevent
unnecessary fault logging.
AMT-F Vehicle Mass Calculation improvements for
units using Electronic Suspension for US.
Open circuit fault (P1052-18) on clutch position
sensor set to frequently in AMT-F.
6/11
8/30/2021
Software
Part
Number
(MSW)
Article
Release Notes
23016584
Improve start gear selection in downhill for
Performance Plus (P+) or HD.
Implement auto neutral function for North
America (New Function).
Improve shifting strategy when downshift is
requested in Engine brake lever stalk position 'Bmode' during engine braking TC engine (Volvo).
22948521
Start of production.
Mack and Volvo Chassis With AMT-F Version
Gearboxes Installed In Trucks Built After November
2019-October 2020
AT2612F, ATO2612F, ASO-C, ASO-ULC, UASO, EOBDU19, EOBD-U20
Software
Part
Number
(MSW)
Release Notes
7/11
8/30/2021
Article
Improvements to Engine idle that was causing
speed oscillations and dropping out of fast idle
when vehicle and gearbox air pressure is building.
Engine speed will drop to idle and then back to set
point when the gearbox air pressure is reliable and
the clutch disengages and shifts to low range.
Improved clutch timing where the clutch releases
slowly from the idle drive position and when
stopped in gear when the brake pedal is depressed.
Improvements to the 12th gear lockout function
and the GST-TMH (Take Me Home) variant would
not prevent shifting to 12th gear when loaded.
Improvements to prevent TECU from using I-See
preview data to allow an incorrect upshift to
overdrive and lugging the engine prior to a hill
when driving using the throttle.
24147789
i-See improvements
Schwung setting to be 0 from factory on all I-SEE
equipped vehicles without forward facing radar
(UCAVS and CAVS-ACS)
Schwung setting to be 5 or 8 km/hr on all I-SEE
equipped vehicles with forward facing radar
(CAVS-AC4/CAVS-AC5/CAVS-AF5)
Schwung is the allowable vehicle speed above the
CCB set speed that allows the truck to maintain a
higher speed in preparation for the next anticipated
hill, or coasting into flat terrain.
Various improvements have been made to the
Offroad mode (P+) that now allow transmission to
skip gears on more occasions.
Improved downshifting response when Veh Speed
is over CCB speed and/or during ACC.
Improved downshifting engine brake performance
(16L_MackAustralia only)
Improvement to shift points and shift speeds
from crawler gears.
23872356
Implement dynamic torque limitation on reverse
crawler high range. For transmission overtorque
protection.
Allow eco-roll if conditions are met and
accelerator position is less than 5%.=
; Live UI
23344747
Start of production
8/11
8/30/2021
23344747
Start of production.
Article
Mack and Volvo Chassis With AMT-F Version
Gearboxes Installed In Trucks Built After October
2020
AT2612F, ATO2612F, ASO-C, ASO-ULC, UASO, EOBDU21
Software
Part
Number
(MSW)
Release Notes
9/11
8/30/2021
Software
Part
Number
(MSW)
Article
Release Notes
24043314
Improvements to Engine idle that was causing
speed oscillations and dropping out of fast idle
when vehicle and gearbox air pressure is building.
Engine speed will drop to idle and then back to set
point when the gearbox air pressure is reliable and
the clutch disengages and shifts to low range.
Improved clutch timing for instances where the
clutch releases slowly from the idle drive position
and when stopped in gear when the brake pedal is
depressed.
Improvements for to the GST-TMH Take Me Home
feature and the 12 gear lock out functionality to
ensure 12 gear not enabled when loaded
Improvements to prevent lugging and incorrect
upshift while using I-See and approaching a hill.
I-See improvements:
Schwung setting to be 0 from factory on all ISEE equipped vehicles without forward facing
radar (UCAVS and CAVS-ACS)S
Schwung setting to be 5 or 8 km/hr on all ISEE equipped vehicles with forward facing
radar (CAVS-AC4/CAVS-AC5/CAVS-AF5)
Schwung is the allowable vehicle speed above
the Cruise Control Brake set speed that allows
the truck to maintain a higher speed in
preparation for the next anticipated hill, or
coasting into flat terrain.
Various improvements have been made to the
Offroad mode (P+) that now allow transmission to
skip gears on more occasions.
Improved downshifting response when Veh Speed
is over Cruise Control Brake speed and/or during
ACC.
Improved downshifting engine brake performance
(16L_Mack Australia only)
24015820
Improved drive mode cycle time for instrument
cluster display to decrease delay when moving
between E/EE/Perf.
Values added for possible missing CC speed
offsets in DID for I-See feature.
; Live UI
10/11
8/30/2021
Article
Software
Part
Number
(MSW)
Release Notes
23941868
Start of Production
Tags
amt-f
amt-f with crawler gears
tecu software
gearbox sw updates
transmission software
tecu sw
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TSB/Document ID: KC-2049
Replacement Service Bulletin Number:
MFR Communication Date: 2021-08-11
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE
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