K31378153

Solution K31378153
Thursday, July 5, 2018 10:15:44 PM CEST
Mack Models
Mack Model
AN-Anthem , CHU , CXU , GU
Engine family
Engine family
MP7 , MP8
Emission Standard
Emission Standard
2018 , OBD2017 , US17 GHG
** SOLUTION **
Title
Mack Chassis - Vehicles Equipped With An Automated Manual Transmission Model F (
AMT-F, mDrive ), Premium Tech Tool ( PTT ) Gearbox Calibration Failure; Gearbox
Calibration Operation Stops And Fails At 33% - US17+OBD16 (GHG17) And Newer
Emissions, Common Model Years 2018 And Newer
Cause
An error in the Tech Tool calibration routine for a gearbox that is not installed in the
chassis is causing Tech Tool to try and calibrate the crawler section even when the
gearbox does not have a crawler gear.
This issue will be resolved with the release of Premium Tech Tool version 2.6.75.
Solution
Follow the steps for the correct condition as described below:
A. Complete gearbox is replaced.
1. Reprogram the TECU on the new gearbox by starting with the old TECU hooked
to PTT, then move to the new TECU when instructed.
- This will transfer all the calibrations for the clutch and gearbox—except the
slip point—to the new TECU. This will allow the TECU to start with a valid
calibration.
2. Install the gearbox into the chassis.
3. Complete a gearbox and clutch calibration based on which components were
replaced to create new calibration values for the new parts.
B. Complete gearbox or control housing replaced without using the old
TECU for data transfer
1. Perform another Programming event by starting with the old TECU and
transferring the calibrations to the New TECU.
- NOTE: Failure to transfer the calibrations to the new TECU will require the
gearbox to be reinstalled in the vehicle in order for calibration to be completed.
This may result in the need for the transmission to be removed again if an issue
with assembly is identified.
2. If the gearbox has been disassembled, verify that the gearbox is assembled
correctly by running the shifter tests in Tech tool.
- The presence of a valid calibration will allow the tests to run.
C. Short, Basic or Control housing/TECU only replaced.
1. Reprogram the TECU on the new gearbox by starting with the old TECU hooked
to PTT, then move to the new TECU when instructed.
- This will transfer all the calibrations for the clutch and gearbox—except the
slip point—to the new TECU. This will allow the TECU to start with a valid
calibration.
2. If the gearbox has been disassembled, verify that the gearbox is assembled
correctly by running the shifter tests in Tech tool.
- The presence of a valid calibration will allow the tests to run.
3. Install the gearbox into the chassis.
4. Start the truck. Let it idle for at least 30 seconds. The clutch slip point will
calibrate automatically once chassis air pressure is high enough to do so.
- NOTE: It is not necessary to complete another calibration operation for this
step.
NA_Sister solutions
K28021025
Temporary solution
Temporary solution
Solution visibility
Dealer distribution
Function(s)/component(s) affected
Function affected
automatic transmission , gear shifting , 3 1 0 TECU , Diagnostic tool
Function Group
Function Group
43 gearbox
Customer effect
Main customer effect
calibration/programming/pairing/missing operation
Conditions
Frequency of occurrence of
problem
Other conditions
always
after a workshop procedure on the vehicle
Administration
Author
RU4469V
Dealer ID
RU4469V
Last modified by
RU4469V
Creation date
12-06-2018 22:06
Date of last update
14-06-2018 19:06
Review date
30-09-2018 00:09
Status
Published
NA_Reviewer
UT9268H
NA_Author_Group
GTT