Installing New GPS Units on a DTNA Vehicle – Zonar Systems Support

If installing a V4 or V4 Base GPS unit on a vehicle with a DTNA factory-installed VT GPS unit, there are a couple of important things to keep in mind.

The designation as a DTNA unit in Ground Traffic Control is important because it determines how data from the unit is distributed, how the unit is supported, and can affect warranty.

When changing devices on a DTNA vehicle:

The Asset Description in Ground Traffic Control should remain the same (the asset description includes the word "DTNA")
The Device Type in Ground Traffic Control should reflect the actual device being used in the vehicle
Use the factory-installed wiring
Even though a V4 or V4 Base is installed, conduct troubleshooting as if it were a VT4 or VT4 Base

When to Install a VT4

When a VTHU (3G) is currently factory installed in the vehicle.

Why a VT4 and not a V4?

Currently the VTHU is only sending Virtual Technician information to the Daimler portal.
Upgrading to a VT4 enables the track and trace, diagnostics, ELD, and GTC+ services for Zonar while preserving the Virtual Technician service through Daimler.
Swapping the VT units enables you to utilize the factory wiring (plug and play). Only the tablet wiring will need to be routed to the factory unit.

When NOT to Install a VT4

When the factory installed unit is already a VT4 (serial number begins with 23). Contact Zonar to activate these units OR install a V4 separately.
When the vehicle is NOT a Daimler vehicle. Install a V4 in ALL of the following:

International
Volvo
Kenworth
Any Freightliner which does not already have a factory unit installed

How Can I Tell if a VTHU is Installed?

Asset List look up:
- Look up the asset number or VIN in the Asset List. If you do not have this document, please ask the Zonar Implementations team for assistance.
- There will be a Current GPS ID in column A which will be a 6 million or 11 million serial number and the Enabled Unit type (column K) will say “Factory VTHU or VT4”.
Master Install document look up:
If the vehicle has already been installed and the unit needs to be swapped, you can find the same information on the Master Install Document sent out in the weekly project status report email.
Find it physically
- There are certain install locations for this box and they are described below
- Insert line drawings of install locations here:
- They can be in the following models, but not in all of them:
- 2012 – 2018 Freightliner Cascadias
- 2017 – 2019 New Cascadias
- 2018 – 2020 Western Star 5700

There are minor physical differences between the VT units and the V4.

Unit	Serial# begins with	Description	When to Install	Picture
VT4	22	Factory installed
VTHU	11 or 17	Factory installed
V4	18 or 21
V4 Base	27	No WiFi module