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 38-10 Check for Short to Battery + Remove both fuses to ECM. All readings are Go to 38-12. Disconnect the vehicle harness greater than 10,000 ohms and 5-way power harness or open. connectors at ECM. Any reading is A short exists between sockets Read resistance between sockets less than or equal to where less than 10,000 M1 of engine harness 10,000 ohms. ohms resistance was read. Repair connector and socket B3 of short and reinsert fuses (or reset vehicle harness connector. breakers).  Then go to 38-30. Also read resistance between socket M1 on engine harness connector and the following sockets on 5-way power harness connector: A and C. 38-11 Check for Short on Ground Turn ignition off. Greater than Go to 38-6. Remove jumper wires. 10,000 ohms. Measure resistance between sockets M1 and Y2 on engine Less than or Signal line (ckt #905) and return harness. equal to 10,000 ohms. line (ckt #952) are shorted together.  Repair short.  Then go to 38-30. 38-12 Replace FPS Turn ignition off. "Check Engine" Go to 38-7. Replace FPS. light comes on. Reconnect all connectors Turn ignition on. "Check Engine" Go to 38-30. Clear codes. light does not Start engine.  Run until "Check come on. Engine" light comes on or for one minute. Change 3  3-345.309