TM2361 (24JUN08) 9001-10-51 450DLC Excavator Operation and Tests 062608 PN=75 Main Controller (MCF) Diagnostic Trouble Codes Boom Bottom Pressure Sensor Diagnostics Boom bottom pressure sensor voltage 0.25 volts or less. – – –1/1 9001 10 51 1 Sensor Check Switch boom bottom pressure sensor with pump 2 delivery pressure sensor. Clear diagnostic trouble codes (DTC) and re-check DTCs. Does DTC follow delivery pressure sensor? YES: Boom bottom pressure sensor malfunction. Replace sensor. NO: Go to Sensor Circuit Check. – – –1/1 2 Sensor Circuit Check Disconnect connector to boom bottom pressure sensor. Check voltage between terminals 1 and 3 of harness. Is voltage between 4.5—5.5 volts? NOTE:
Key Switch: ON YES: Go to Open Circuit Check. NO: Go to Harness Voltage Check. – – –1/1 3 Open Circuit Check Disconnect connector to boom bottom pressure sensor. Check continuity between main controller (MCF) connector C pin C24 and boom bottom pressure sensor pin 2. Is there continuity between the pins? YES: Go to Short Circuit Check. NO: Open in harness. Repair or replace harness. See Cab Harness (W1) Wiring Diagram and see Machine Harness (W2) Wiring Diagram. (Group 9015-10.) – – –1/1