11995.03 Arm Roll-Out Pilot Pressure Sensor Circuit Voltage High MS12501,0000081 –19–17JAN06–1/1 TM2361 (24JUN08) 9001-10-128 450DLC Excavator Operation and Tests 062608 PN=152 Main Controller (MCF) Diagnostic Trouble Codes 4 Short Circuit Check Disconnect harness from pump 1 (4-spool) control pressure sensor and main controller YES: Short circuit in (MCF). harness. Check continuity between pump 1 (4-spool) control pressure sensor connector pin 2 Repair or replace and power and ground. harness. See Cab Harness (W1) Wiring 9001 Is there continuity to power or ground? Diagram , see Machine 10 Harness (W2) Wiring ,128 Diagram, and see Pump Harness (W8) Wiring Diagram. (Group 9015-10.) NO:
Main controller (MCF) malfunction. Replace controller. See Main Controller (MCF) Remove and Install. (Group 9015-20.) – – –1/1 Main Controller (MCF) Diagnostic Trouble Codes 4 Short 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 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 Pump Harness (W8) 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 ,128 5 Harness Voltage Check Disconnect pump 1 (4-spool) control pressure sensor from harness. Check voltage between pump 1 (4-spool) control 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 pump 1 (4-spool) control pressure sensor pin 3. 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.) NO:
Open circuit in harness between main controller (MCF) and pump 1 (4-spool) control pressure sensor pin 1. 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