TM2361 (24JUN08) 9001-10-28 450DLC Excavator Operation and Tests 062608 PN=52 Main Controller (MCF) Diagnostic Trouble Codes Boom Up Pilot Pressure Sensor Diagnostics Boom up pilot pressure sensor voltage 4.75 volts or higher. 9001 10 28 – – –1/1 1 Sensor Check Switch boom up pilot pressure sensor with another pilot pressure sensor. Clear diagnostic trouble codes (DTC) and re-check DTCs. Does DTC follow boom up pilot pressure sensor? YES: Boom up pilot pressure sensor malfunction. Replace sensor. NO: Go to Sensor Circuit Check. – – –1/1 2 Sensor Circuit Check Disconnect connector of boom up pilot 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 harness from boom up pilot pressure sensor and main controller (MCF). Check continuity between boom up pilot pressure sensor connector pin 2 and main controller (MCF) connector C pin C13. Is there continuity between the pins? YES: Go to Short Circuit Check. NO: Open circuit in harness. Repair or replace harness. See Cab Harness (W1) Wiring Diagram and see Machine Harness (W2) Wiring Diagram. (Group 9015-10.) – – –1/1