According to records filed in the case, Achtemeier conspired with mechanics in garages and operators of truck fleets to disable the anti-pollution software installed on diesel trucks.
Coconspirators who wanted to disable their trucks’ pollution control hardware system—a process commonly known as “deleting”—sought Achtemeier’s help to trick the truck’s software into believing the emissions control systems were still functional, a process known as “tuning.”
Monitoring software on a deleted truck will detect that the pollution control hardware is not functioning and will prevent the truck from running. Achtemeier disabled the monitoring software on his client’s trucks by connecting to laptops he had provided to various coconspirators. Some of the coconspirators would pass the laptop on to others seeking to have the anti-pollution software disabled on their trucks. Once the laptop was hooked up to the truck’s onboard computer, Achtemeier could access it from his computer and tune the software designed to slow the truck if the pollution control device was missing or malfunctioning. Achtemeier could “tune” trucks remotely, which enabled him to maximize his environmental impact and personal profit.
My understanding from past reading is that there’s a history of diesel trucks pulling off emissions control hardware to increase their MPG somewhat, so they save money on fuel. First ran into it when reading about the practice in Europe, but also happens here in North America.
I don’t know whether it’s possible to tweak the computer-controlled system to achieve a similar effect, but it’d make sense.
It’s more than just reprogramming, the delete process also includes removing the hardware itself.
Ah, that’d do it then. Thanks.