S7577

July, 2021
Service Campaign S7577
Vehicle Electronic Control Unit (VECU) Software Update
Service Category Service Department
Section Function Group 364
Technician Skill Level A
Market North America
Applicability
VOLVO
Model Years
2021 - 2022
Models
VAH, VHD, VN, VNE
Introduction
Volvo Trucks has determined that enhanced vehicle control strategies are needed for application
specific needs. To deliver these improvements new VECU Software has been released and made
available. The new VECU software will improve: PTO functionality, update certain parameters,
enhance cruise control operation, and advanced DTC strategies.
Production Change Information
This bulletin applies to vehicles built within the specified production changes below.
Brand
Engine
Emission Level
Starting Build Date
Ending Build Date
EM-USA17,
D11/13
Volvo
EM-USA21,
03-February-2020
19-March-2021
CU12/15
EM-ZE
Warranty Information
This repair is covered by an authorized Service Program.
Reimbursement is obtained through the normal claim handling process.
Claim Type (used only when uploading from the Dealer Bus. Sys.)
B
Main Labor Code
Description
3640-22-03-02
Program Vehicle Electronic Control Unit
Causal Part
SCC Authorization
Code
Expiration Date
Hours
3092072
S7577
July 31, 2022
0.5
Service Campaign S7577
July, 2021
Vehicle Electronic Control Unit (VECU) Software Update
Parts Information
Special Order Information if applicable,
Part Numbers
Part Names
Quantity
*NA
Required Tools & Equipment

Premium Tech Tool (PTT) with latest version
Calibration Information

None
Repair Procedure
1.
2.
3.
4.
5.
6.
Secure vehicle for service.
Connect the latest version of Premium Tech Tool (PTT) to the Vehicle.
After identification is complete, navigate to the program tab within PTT.
Select operation 1700-08-03-39 Program Electronic Control Unit.
Select the Vehicle Electronic Control Unit option and reprogram the control unit.
After programming is complete, clear any inactive DTC’s left by the programming
process.
7. Return the vehicle to service.
If you have questions about the programming operation with PTT 2.8 visit
http://www.premiumtechtool.com/