TM2361 (24JUN08) 9001-10-26 450DLC Excavator Operation and Tests 062608 PN=50 Main Controller (MCF) Diagnostic Trouble Codes Swing Pilot Pressure Sensor Diagnostics Swing pilot pressure sensor voltage 0.25 volts or less. 9001 10 26 – – –1/1 1 Sensor Check Switch swing pilot pressure sensor with another pilot pressure sensor. Clear diagnostic trouble codes (DTC) and re-check DTCs. Does DTC follow swing pilot pressure sensor? YES: Swing pilot pressure sensor malfunction. NO: Go to Sensor Circuit Check. – – –1/1 2 Sensor Circuit Check Disconnect connector of swing 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 swing pilot pressure sensor and main controller (MCF). Check continuity between swing pilot pressure sensor connector pin 2 and main controller (MCF) connector D pin D16. 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 Control Valve Harness (W7) Wiring Diagram. (Group 9015-10.) – – –1/1