STEP/SEQUENCE RESULT WHAT TO DO NEXT TM 9-2320-363-20-1 Section 4 TROUBLESHOOTING CHARTS E. FLASH CODE:  18 J1587 CODE: P724 - BYPASS POSITION CIRCUIT FAILED HIGH (HIGH VOLTAGE) 18-4 Check for +5 Volts Remove jumper wire. Between 4 to Go to 18-5. Turn ignition on. 6 volts. Read voltage on BPS harness connector, pin C (red lead) to pin Less than Go to 18-8. A (black lead). 4 volts. Greater than Go to 18-10. 6 volts. 18-5 Check for Signal Open Turn ignition off. Less than or equal Go to 34-6. Disconnect the engine equal to 5 ohms. harness connector at the ECM. Install a jumper wire between Greater than Signal line (ckt#907) or return A and B of the BPS harness 5 ohms or open. line (ckt#452) is open. Repeat connector. check from pin A to Y2 and pin Read resistance between sockets B to R1. Repair open. Then go R1 and Y2 on the engine harness to 18-30. connector. 18-6 Check for Short Remove jumper. Less than or Signal line (ckt#907) is shorted Read resistance between pins A equal to 10,000 ohms to the return line (ckt#452). and B on the BPS harness on either reading. Repair short. Then  go to 18-30. connector. Also read resistance between Greater than Go to 18-7. socket B and a good ground 10,000 ohms or open on both readings. 18-7 Check ECM Connectors Check terminals at the ECM Terminals and connectors Reprogram ECM. Then go to engine harness connector are okay. 18-30. (both ECM and harness side) for damage; bent, corroded, and Problem found Repair terminals/connectors. unseated pins or sockets. Then go to 18-30. Change 3  3-345.225