Fuel Pump Electrical Circuit
The
fuel pump relay is located below the rear seat inside the rear electrical center. The fuel pump relay allows the
fuel pump to be energized by the
PCM. When the ignition is first turned On, the PCM energizes the fuel pump relay for
two seconds. This allows the fuel pump to run for
two seconds and build up
fuel pressure for cranking. The PCM then waits for ignition reference pulses from the
ignition coils. Once the PCM sees references pulses, the PCM energizes the relay to run the fuel pump.