Section 4 TM  9-2320-363-20-1 TROUBLESHOOTING CHARTS E. CODE38.  FUEL  PRESSURE  SENSOR  (FPS)  SIGNAL   VOLTAGE  LOW   (Cent’d.) 38.3 Check FPS Connectors l Turn ignition off. . Inspect terminals at the FPS connectors (sensor side and harness side) for damage; bent, corroded, and unseated pins or sockets. 384  Check  for  +5  Volts l Turn ignition off. l Remove jumper wire. l Connect vehicle harness to ECM. l Turn  ignition  on. l Read voltage on FPS harness connector, socket C to socket A. 38.5 Check for Signal Open l Turn  ignition  off. l Disconnect engine harness connector at the ECM. . Install a jumper wire between sockets A and B of the FPS harness   connector. l Read  resistance  between  sockets M 1 and Y2 on the engine harness connectors. 38.6 Check for Short l Remove jumper wire. l Disconnect the engine harness connector at the ECM. l Read  resistance  between  sockets A and B on the FPS harness connector. T  e  r  m  i  n  a  l  s      a  n  d connectors  are  okay. B e t w e e n     4     t o — 6 volts. Less than 4 volts. G  r  e  a  t  e  r   t  h  a  n 6 volts. L e s s    t h a n    o r    — equal to 5 ohms. G r e a t e r     t h a n     — 5 ohms or open. L e s s    t h a n    o r    — equal  to  10,000  ohms. G  r  e  a  t  e  r   t  h  a  n 10,000 ohms or open. WHAT TO DO NEXT Then go to 38-30. -Repair   terminals/connectors, page 3-2. Then go to 38-30. ~Go to 38-5. line (ckt #452) is open. Contact Direct Support to the return line (ckt #452). Contact Direct Support. 3-285