P0230

Description
FUEL PUMP CONTROL CIRCUIT

PCM provides ignition voltage to control fuel pump. PCM has
ability to detect an electrical malfunction on relay control circuit.
When ignition is first turned on, PCM energizes fuel pump relay which
applies power to fuel pump. Fuel pump relay will remain on as long
engine is running or cranking and PCM is receiving reference pulses.
If no reference pulses are present, PCM de-energizes fuel
pump relay within 2 seconds after ignition is turned on or engine is
stopped. With engine off/stopped, fuel pump can be turned on by using
scan tool output controls function. If electrical malfunction is
detected, DTC will set.
Symptoms

Engine may not start or stay running

Solutions

• Disconnect fuel pump relay. Connect a test light between
  fuel pump relay connector cavities for fuel pump relay control circuit
  and relay ground. Install scan tool. Turn ignition on, with engine
  off. Using scan tool, command fuel pump relay on and off. If test
  light illuminates when fuel pump is commanded on,
• Check fuel pump relay
  
• Check for poor terminal connection at fuel pump relay
  connector.
• Check for any shorted wires