Solution K49053322
Tuesday, August 7, 2018 5:09:16 PM CEST

Mack Models
Mack Model

TE-TerraPro , GR-Granite , PI-Pinnacle , AN-Anthem

Volvo Models
Volvo Model

VNR , VNL , VHD , VAH

Engine family
Engine family

11L Engine , 13L Engine , MP7 , MP8

Emission Standard
Emission Standard

2018 , OBD2017 , US17 GHG

** SOLUTION **
Title

Vehicle Speed Factor (K-Factor) Programming - Speed Factor Value Incorrect When
Calculated In Premium Tech Tool (PTT); Speedometer Reading Incorrectly Following A
Change To Vehicle Speed Factor - US17+OBD16 And Newer Emissions, Common
Model Year 2018 And Newer

Cause

Newer vehicles may display an incorrect speedometer reading in the Instrument Cluster
following changes made to the vehicle speed factor following a drive axle ratio or tire
size/model change.
This issue is caused by a conversion error in PTT. It has been determined that the
calculated value is correctly displayed, but the value that is programmed is incorrect.

Solution

Prior to performing any steps below, ensure that PTT is the current version. At the
time of this solution's composition, PTT version 2.6.70 is the current release. The
conversion error will be fixed in a future release. If a newer version is available,
PTT should be updated and the issue confirmed to still exist prior to proceeding.
A. Calculate the Vehicle Speed Factor
1. Run PTT Operation 3829-08-03-06 Vehicle Speed Factor, located under the
Calibrate tab.
2. Enter the Drive axle ratio and Tire revs / mile as required
3. Press the Play button in the Step 1 box on the left-hand side of the screen. The
Calculated Value box will display the Speed Factor. This value is correctly
calculated.
4. DO NOT PRESS PLAY IN THE STEP 2 BOX. Copy or record the value
displayed in the Step 1 box, then exit the Operation.

B. Program the Calculated Value
1. Run PTT Operation 1700-22-03-03 Parameter Programming, located under the
Program tab.
2. Once parameters have loaded, search for or locate parameter MH, Vehicle Speed
Factor US.
3. Enter the value that was copied or recorded in Part A as the new value for
parameter MH.
4. Complete the parameter programming operation to save the new Vehicle Speed
Factor value.
Solution visibility

Dealer distribution

Function(s)/component(s) affected
Function affected

dashboard/information display , Diagnostic tool

Function Group
Function Group

382 engine and transmission instrument , 383 speedometer; trip meter; hour counter;
clock

Customer effect
Main customer effect

acceleration/speed , calibration/programming/pairing/missing operation

Conditions
Vehicle operating mode

when driving

Other conditions

after a workshop procedure on the vehicle

Administration
Author

RU4469V

Dealer ID

RU4469V

Last modified by

RU4469V

Creation date

27-07-2018 15:07

Date of last update

30-07-2018 18:07

Review date

02-01-2019 00:01

Status

Published