Fitting the controller
Where to mount it, how to power it, and how to get it talking to your car.
Moderate · About an hour
Pick a mounting spot
Choose somewhere dry, out of direct engine heat, and within reach of both the OBDII port and a route to the front of the car. Behind the dash on the driver's side usually satisfies all three.
Leave the connector accessible. You will want to reach it again for firmware updates over USB-C, even though updates also work over Bluetooth.
Power and ground
The controller takes switched 12 V and a chassis ground. Use a circuit that dies with the ignition, so the lighting cannot flatten your battery overnight.
Ground to bare metal on the chassis, not to a painted surface and not to another accessory's ground. A poor ground shows up as flicker long before it shows up as a failure.
Connect to the CAN bus
Plug the OBDII lead into the port under the dash. The controller listens; it does not transmit requests unless you configure it to.
For a Haltech or other aftermarket ECU, connect CANH and CANL to the ECU's broadcast pair instead. Match the ECU's bitrate in the configuration.
Confirm it is reading the car
Turn the ignition on and open the configuration over Bluetooth. Live values should populate within a few seconds.
If nothing appears, the usual causes are a bitrate mismatch, CANH and CANL swapped, or a vehicle that does not broadcast on the pins you have connected to.
Something here wrong or unclear? Tell us at support@tevtronix.com and we will fix it.