NHTSA ID Number: 10173130
Manufacturer Communication Number: S7459
TSB/Document Date: 2020-04-02
Summary
PI0889 DIFFERENTIAL LOCK ENGAGEMENT STATUS ALARM UPDATE
Mack Trucks
Greensboro, NC USA
Service Program
Trucks
Date
Group
No.
Release
Page
3.2020
381
047
01
1(5)
Instrument Cluster Reprogramming (MID
140)
GU, GR
PI0889 Differential Lock Engagement Status
Alarm Update (MID 140)
(March 2020)
This notification is to announce that Mack trucks has released improved
differential lock warning software for the instrument cluster. Previously the
driver would be initially alerted to the system engagement with a popup in the
cluster along with an audible alarm that lasted approximately five seconds then
would automatically dismiss. The improved software keeps the message and
alarm persistent until the system is disengaged. The message in the cluster can
be ignored for thirty seconds but will return. The following highlights the
differences between the current and new software. To perform the update, follow
the procedure below
Note: This bulletin does not apply to MACK Trucks Australia.
Mack Trucks
Service Program
Date
Group
No.
Release
Page
3.2020
381
047
01
2(5)
Mack Trucks
Service Program
Date
3.2020
Group
No.
Release
381
047
01
Page
3(5)
Mack Trucks
Service Program
Date
3.2020
Group
No.
Release
381
047
01
Instrument Cluster, Reprogramming
You must read and understand the precautions and guidelines in Service Information,
group 30, "General Safety Practices, Electrical" before performing this procedure. If you
are not properly trained and certified in this procedure, ask your supervisor for training
before you perform it.
NOTE: Information is subject to change without notice. Illustrations are used for reference
only and can differ slightly from the actual vehicle being serviced. However, key
components addressed in this information are represented as accurately as possible.
DANGER
Do not attempt to repair or service this vehicle without having sufficient training, the
correct service literature and the proper tools. Failure to follow this could make the vehicle
unsafe and lead to serious personal injury or death.
1 Park the vehicle on a flat and level surface.
2 Apply the parking brake.
3 Place the transmission in neutral or park.
4 Install the wheel chocks.
W7086748
5 Using Premium Tech Tool (PTT), connect to the vehicle, select MID 140 Instrument
Cluster Programming and program the control unit.
Note: Follow the on screen prompts until the programming is complete.
Page
4(5)
Mack Trucks
Service Program
Date
3.2020
Group
No.
Release
381
047
01
6 Remove the wheel chocks.
W7086759
Reimbursement
This repair is covered by an authorized Service
Program. Reimbursement is obtained through the
normal claim handling process.
UCHP Reimbursement
Claim Type (used only when uploading from the Dealer B
Bus. Sys.)
Recall Status
Vehicle inspected, repair not required
1- Inspected OK
Vehicle repaired per instruction
2- Modified per instruction
Labor Code
Primary Labor Code (Instrument Cluster Reprogramming)
3810–22–03–11
0.4 hrs
Causal Part
85102456
SCC Code
S7459
Authorization Number
N/A
Expiration Date
31-March-2021
Page
5(5)
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TSB/Document ID: S7459
Replacement Service Bulletin Number:
MFR Communication Date: 2020-03-06
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ELECTRICAL SYSTEM
MFR Component System:
MFR Component Subsystem:
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