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Page Title: OIL PRESSURE CIRCUIT FAILED LOW (LOW VOLTAGE)
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TM   9-2320-360-20-3 Section  4 TROUBLESHOOTING CHARTS E .   F L A S H C O D E :   36 J1587  CODE: P100 4 - OIL PRESSURE CIRCUIT FAILED LOW (LOW VOLTAGE) STEP/SEQUENCE 36-4 Check for +5 Volts Turn ignition off. Remove jumper wire. Turn ignition on. Read voltage on OPS connector, socket C (red lead) to socket A (black lead). 36-5 Check for Signal Open Turn ignition off. Disconnect  the  engine  harness connector at the ECM. Install a jumper wire between sockets A and B of the OPS connector. Read  resistance  between  sockets P2 and Y2 on the engine harness connectors. 36-6 Check  for  Short Remove  jumper  wire. Disconnect  the  engine  harness connector at the ECM. Read  resistance  between  sockets A and B on the OPS connector. Also  read  resistance  between socket B and a good ground. 36-7 Check  ECM  Connectors Check terminals at the engine harness connector (both the ECM and harness side) for damage; bent, corroded and unseated pins or sockets. Especially W1, P2, and Y2 terminals and pins at ECM RESULT WHAT TO DO NEXT Between 4 to 6 volts. Less than 4 volts. Go to 36-5. Go to 36-6. Greater than 6 volts. Go to 36-10. Go to 36-11. Signal line (ckt #530) is open. Repair open. Then go to 36-30. Less than or equal to 10,000 ohms. Signal line (ckt #530) is shorted to the return line (ckt #452) or battery ground. Repair short. Then go to 36-30. Greater  than 10,000 ohms or open. on both readings. Go to 36-12. Terminals and Replace ECM (para 7-29.1). connectors are okay. Then go to 36-30. Problem found. Repair   terminals/connectors (para 7-77). Then go to 36-30. H-185

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