What this diagram is for
The Elite 1500 and 2500 CAN communications wiring guide shows how the ECU's CAN connections are wired so it can share data with other devices. It's the reference we use when connecting a dash, a CAN wideband controller, a keypad, an expander or a factory vehicle network to the ECU.
When you need it
- Adding a Haltech dash or other CAN device to a new install.
- Connecting several devices, for example through an Elite CAN hub.
- Tracking down a device that isn't showing up in ESP.
What to check
- CAN high and CAN low are the right way around at every connector.
- The two CAN wires stay twisted together along their run.
- The network is terminated correctly at its ends; too much or too little termination causes lost messages.
- Every device has good power and ground.
For more background, see our CAN bus overview and the Elite 1500 / 2500 quick start guide.
Need this diagram? Ask us and we'll send it over with advice for your build.
