TM2361 (24JUN08) 9001-10-125 450DLC Excavator Operation and Tests 062608 PN=149 Main Controller (MCF) Diagnostic Trouble Codes Pump 1 (4-Spool) Control Pressure Sensor Diagnostics Pump 1 (4-spool) control pressure sensor voltage 4.75 volts or higher. – – –1/1 9001 10 ,125 1 Sensor Check Switch pump 1 (4-spool) control pressure sensor with another pilot pressure sensor. Clear diagnostic trouble codes (DTC) and re-check DTCs. Does DTC follow pump 1 (4-spool) control pressure sensor? YES: Pump 1 (4-spool) control pressure sensor malfunction. Replace sensor. NO: Go to Sensor Circuit Check. – – –1/1 2 Sensor Circuit Check Disconnect connector of pump 1 (4-spool) control 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 pump 1 (4-spool) control pressure sensor and main controller (MCF). Check continuity between pump 1 (4-spool) control pressure sensor connector pin 2 and main controller (MCF) connector D pin D11. 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 , see Machine Harness (W2) Wiring Diagram, and see Pump Harness (W8) Wiring Diagram. (Group 9015-10.) – – –1/1