Fuel Pump Relay
The Powertrain Control Module (PCM) controls fuel pump relay operation by controlling fuel pump relay ground circuit. PCM opens ground circuit when ignition is off, and completes ground circuit when ignition is on, to provide fuel pump operation. When ignition is first turned on, if crankshaft position sensor does not detect engine rotation, PCM de-energizes fuel pump relay after approximately one second.
Fuel pump relay receives battery voltage from fuse located in power distribution center. Power distribution center is located on driver's side front fender, near battery. Fuel pump relay is the second relay from rear (firewall side) of power distribution center. See Fig 1 . If fuel pump relay or control circuit becomes defective, a Diagnostic Trouble Code (DTC) may be stored in the PCM. See the TESTS W/CODES article. For additional information on diagnosis for fuel pump relay and control circuit, see appropriate NO START (NS) TEST in the TESTS W/CODES article.