Main Controller (MCF) Diagnostic Trouble Codes 11301.04 Swing Pilot Pressure Sensor Circuit Voltage Low MS12501,0000052 –19–21FEB06–1/1 TM2361 (24JUN08) 9001-10-25 450DLC Excavator Operation and Tests 062608 PN=49 4 Short Circuit Check Disconnect harness from swing pilot pressure sensor and main controller (MCF). Check continuity between swing pilot pressure sensor connector pin 2 and power and ground. Is there continuity to power or ground? YES: Short 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.) NO: Main controller (MCF) malfunction.
Replace controller. See Main Controller (MCF) Remove and Install. (Group 9015-20.) – – –1/1 9001 10 25 5 Harness Voltage Check Disconnect swing pilot pressure sensor from harness. Check voltage between swing pilot pressure sensor connector pin 1 and machine ground. Is voltage between 4.5—5.5 volts? NOTE: Key Switch: On YES: Open circuit in harness between main controller (MCF) and swing pilot pressure sensor pin 3. 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.) NO: Open circuit in harness between main controller (MCF) and swing pilot pressure sensor pin 1.
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