STEP/SEQUENCE RESULT WHAT TO DO NEXT TM 9-2320-363-20-1 Section 4 TROUBLESHOOTING CHARTS E. FLASH CODE: 82 - CRANKCASE MONITOR (CCM) SIGNAL VOLTAGE LOW (CONT'D) J1587 CODE: P98-4 - OIL LEVEL CIRCUIT FAILED LOW P101.4 - CRANKCASE PRESSURE CIRCUIT FAILED LOW 82-4 Check for +5 Volts Turn ignition off. Between 4 to Go to 82-5. Remove jumper wire. 6 volts. Connect vehicle harness to ECM. Turn ignition on. Less than Go to 82-8. Read voltage on CCM harness 4 volts. connector, socket C (red lead) to socket A (black lead).   Greater than Go to 82-10. 82-5 Check for Signal Open Turn ignition off. Less than or Go to 82-11. Disconnect engine harness equal to 5 ohms. connector at ECM. Install a jumper wire between Greater than Signal line (ckt #906) is open. sockets A and B of CCM 5 ohms or open. Repair open.  Then go to 82-30. harness connector. Read resistance between sockets N1 and Y2 on engine harness connectors. 82-6 Check for Short Remove jumper wire. Less than or Signal line (ckt #906) is shorted Disconnect engine harness equal to 10,000 ohms to return line (ckt #452) or connector at ECM. battery ground.  Repair short. Read resistance between sockets Then go to 82-30. A and B on CCM harness connector. Greater than Go to 82-12. Also read resistance between 10,000 ohms or open socket B and a good ground. on both readings. 82-7 Check ECM Connectors Check terminals at ECM engine Terminals and Replace ECM.  Then go to 82-30. harness connector (both ECM connectors are okay. and harness side) for damage; bent, corroded and unseated Problem found. Repair terminals/connectors. pins or sockets.  Especially W1, Then go to 82-30. N1 and Y2 terminals and pins at ECM. Change 3  3-345.385