Main Relay

Main Relay:

The main relay is controlled by the Powertrain Control Module (PCM). The PCM provides an electrical ground for the coil of the main relay when the ignition is ON or when the engine is running. The main relay provides power to many of the engine control components including the PCM. The following is a list of some of the PCM controlled outputs that depend on the main relay for proper operation:
^ The ignition system
^ The fuel injector
^ The fuel pump
^ The Exhaust Gas Recirculation (EGR) system solenoids
^ The EVAP Control system solenoids
^ The Idle Speed Control (ISC) relay
^ The Early Fuel Evaporation (EFE) relay

The main relay is located in the relay box on the LH side of the engine compartment near the battery.