STEP/SEQUENCE RESULT WHAT TO DO NEXT TM 9-2320-363-20-1 Section 4 TROUBLESHOOTING CHARTS E.  FLASH CODE:  38 J1587 CODE: P94 4 * FUEL PRESSURE CIRCUIT FAILED LOW 38-3  Check FPS Connectors Turn Ignition off. Terminals and Replace FPS. Then go to 38- 30. Inspect terminals at the FPS connectors are okay. connectors (sensor side and harness side) for damage; bent, Problem found. Repair terminals/connectors. corroded, and unseated pins Then go to 38-30. or sockets. 38-4  Check for +5 Volts Turn Ignition off. Between 4 to Go to 38-5. Remove jumper wire. 6 volts. Connect vehicle harness to ECM. Turn ignition on. Less than Go to 38-8. Read voltage on FPS harness 4 volts. connector.  socket C to socket A. Greater than Go to 38-10. 6 volts. 38-5  Check for Signal Open Turn ignition off. Less than or Go to 38-11. Disconnect engine harness equal to 5 ohms. connector at ECM. Install a jumper wire between Greater than Signal line (ckt #905) or return sockets A and B of the FPS 5 ohms or open. line (ckt #452) Is open Repair harness connector. open.  Then go to 38-30. Read resistance between sockets M1 and Y2 on engine connectors. 38-6  Check for Short Remove jumper ire. Less than or Signal line (ckt#905) is shorted Disconnect the engine harness equal to 10,000 ohms. to the return line (ckt #452). connector at the ECM. Repair short.  Then go to 38- 30. Read resistance between sockets A and B on FPS harness Greater than Go to 38-12. connector. 10,000 ohms or open. Change 3  3-345.305