Main Relay (Computer/Fuel System): Description and Operation

The main relay provides power to most of the engine control system components. The main relay is controlled by the Powertrain Control Module (PCM). The PCM provides an electrical ground for the coil of the main relay, anytime the ignition switch is ON.

The main relay is located in the junction box, next to the fuel pump relay, behind the LH side kick panel of the passenger compartment.