Bad wording on my behalf. The CSP5 switch connects to the vehicle's OBDII port, but is mounted inside the vehicle cab. It cannot be hard wired into the ECM like DSP.
Given switching is CAN based, it's quite a complex design when compared to the 'simple' relay based DSP switch. The pricing of the CSP switch will reflect the difference in complexity but retain the compact size.
The 6th position tune is automatically selected when a spare pin on the ECM is grounded. As an example, if a customer wanted to engage a specific tune for Nitrous, they would wire the ECM pin to the nitrous system, when the nitrous is turned on the ECM automatically switches to this tune.
We have also added a controllable output on the ECM that can be turned on once a series of user defined conditions have been met, this could be useful for a warning lamp, or disabling nitrous unless certain conditions are met, such as minimum RPM's, throttle position.
Cheers
Cindy