VMX Installation Guide
10
Engine diagnostics (optional)
1. After fishing the Pigtail cable through the truck down to the location of the ECU plug, connect it
to the engine diagnostics cable as shown below.
2. Plug the end of the Engine diagnostics cable show below into the ECU plug of the vehicle
(either a 9-pin or 6-pin). Constant power and ground will be supplied to the MDT through the
connections you make to the fuse box.
The end shown above is an additional ECU port that can be used for any other need. For
example, a mechanic can connect a secondary ECU device to this port to temporarily
diagnose the vehicle. This ensures that the MDT remains connected at all times but
doesn't "clog" the ECU port.
