Circuit Description

Fuel pump is powered by fuel pump relay. PCM energizes fuel pump relay at ignition on for 2-3 seconds. Fuel pump will remain on for as long as PCM receives reference pulse from electronic ignition system. Conditions for setting DTC:

• Ignition is on.
• System voltage 9-18 volts.
• PCM detects an electrical malfunction on fuel pump relay control circuit.
• Conditions met for 0.5 second.