STEP/SEQUENCE RESULT WHAT TO DO NEXT TM 9-2320-363-20-1 Section 4 TROUBLESHOOTING CHARTS E.  FLASH CODE: 86 (Cont'd) J1587 CODE: P73.3 PUMP PRESSURE CIRCUIT FAILED HIGH · (Below) P108-3 BAROMETRIC PRESSURE CIRCUIT FAILED HIGH · (TBD) 86-4 Check PGC Sensor Connectors Inspect terminals at the PGC Terminals and Replace PGC sensor.  Then go sensor connector (sensor side connectors okay. to 86-30. and harness side) for damaged, bent, corroded, and unseated pins Problem found. Repair terminals/connectors or sockets. Then go to 86-30. 86-5 Check for Short to +5 Volts Turn ignition off. Less than or Signal line (ckt #749) is shorted Disconnect the vehicle harness equal to 10,000 ohms. to the engine +5 volt line (ckt connector at the ECM. #916). Repair short. Then go to Read resistance between sockets 86-30. A3 and D3 on the engine harness connector.   Greater than Go to 86-6. 10,000 ohms or open. 86-6 Check for Short to Battery + Remove both fuses to the ECM. All readings Go to 86-7. Disconnect the vehicle harness are greater than connector at the 5-pin power harness connector at the ECM. Read resistance between socket Any reading is A short exists between the signal D3 of the engine harness less than or line (ckt #749) and battery +. connector. equal to 10,000 ohms. Repair short and reinsert fuses Also read resistance between (or reset breakers). Then go to socket D3 of the engine harness 86-30. connector and the following sockets on the 5-pin power harness connector: A and C. 86-7 Check PGC Sensor Connections Inspect terminals at the PGC Terminals and Replace PGC sensor.  Then go sensor connector (sensor connectors okay. to 86-8. and harness side) for damaged, bent, corroded, and unseated pins Problem found. Repair terminals/connectors. or sockets Then go to 86-30. Change 3  3-345.399