STEP/SEQUENCE RESULT WHAT TO DO NEXT TM 9-2320-363-20-1 Section 4 TROUBLESHOOTING CHARTS E. FLASH CODE: 81 - CRANKCASE MONITOR (CCM) SIGNAL VOLTAGE HIGH J1587 CODE: P98 3 - OIL LEVEL CIRCUIT FAILED HIGH P101 3 - CRANKCASE PRESSURE CIRCUIT FAILED HIGH NOTE - This chart is only to be used if: 1) All basic mechanical checks and physical inspections have been performed with no problem found, and 2) Diagnosis of DDEC-III was started at step Start-1, pg 3-345.41 and you have now been referred here. 81-1 Multiple Code Check Were there any other active No other codes. Go to 81-2. codes beside Code 98-101/3? Yes, any or all Go to ENG5V-1, page 3-345.413. of the following codes: 110, 175/3 or 4, 174/3 or 4, 102/3, 94/4. Yes - but none of the above. 81.2 Sensor Check Turn ignition off. Code 98:101/4 (and any Go to 81-3. Disconnect CCM connector. codes except Code 81). Turn ignition on. Start and run engine. Code 98-101/3 (and any. Go to 81-5. Read ACTIVE CODES. other codes). 81-3 Return Circuit Check Turn ignition off. Less than or Go to 81-4. Disconnect the engine harness equal to 5 ohms. connector at ECM. Install a jumper wire between pins Greater than Return line (ckt #452) is open. A and B of CCM harness 5 ohms. Repair open.  Then go to 81-30. connector. Read resistance between sockets N1 and Y2 on the engine harness connector. 81.4 Check CCM Connectors Inspect terminals at CCM Terminals and Replace CCM.  Then go to 81-30. connectors (sensor side and connectors are okay. harness side) for damage; bent, corroded, and unseated pins or Problem found. Repair terminals/connectors. Sockets. Then go to 81-30. Change 3  3-345.377