11901.03 Hydraulic Oil Temperature Sensor Circuit Voltage High MS12501,0000064 –19–21FEB06–1/1 TM2361 (24JUN08) 9001-10-52 450DLC Excavator Operation and Tests 062608 PN=76 Main Controller (MCF) Diagnostic Trouble Codes 4 Short Circuit Check Disconnect harness from main controller (MCF) and boom bottom pressure sensor. YES: Short circuit in harness. Check continuity between boom bottom pressure sensor connector pin 2 and power and ground. Repair or replace harness. See Cab Is there continuity between pin 2 and power or ground? Harness (W1) Wiring 9001 Diagram and see 10 Machine Harness (W2) 52 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 main controller (MCF) and boom bottom pressure sensor. Check continuity between boom bottom pressure sensor connector pin 2 and power and ground. Is there continuity between pin 2 and power or ground? YES: Short circuit in harness. Repair or replace harness. See Cab Harness (W1) Wiring Diagram and see Machine Harness (W2) 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 52 5 Harness Voltage Check Disconnect boom bottom pressure sensor from harness. Check voltage between boom bottom 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 boom bottom pressure sensor pin 3. Repair or replace harness. See Cab Harness (W1) Wiring Diagram and see Machine Harness (W2) Wiring Diagram. (Group 9015-10.) NO: Open circuit in harness between main controller (MCF) and boom bottom pressure sensor pin 1. Repair or replace harness. See Cab Harness (W1) Wiring Diagram and see Machine Harness (W2) Wiring Diagram.
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