11412.03 Hydraulic Fan Pump Control Solenoid Valve Feedback Current High MS12501,0000060 –19–21FEB06–1/1 TM2361 (24JUN08) 9001-10-46 450DLC Excavator Operation and Tests 062608 PN=70 Main Controller (MCF) Diagnostic Trouble Codes 1 Solenoid Resistance Disconnect harness connector from pump 1 (4-spool) control solenoid. Check YES: Go to Continuity Check resistance of solenoid. Check. Is resistance between 14—21 ohms? NO: Pump 1 (4-spool) control solenoid malfunction. Replace 9001 solenoid. 10 46 – – –1/1 Main Controller (MCF) Diagnostic Trouble Codes 1 Solenoid Resistance Check Disconnect harness connector from pump 1 (4-spool) control solenoid. Check resistance of solenoid.
Is resistance between 14—21 ohms? YES: Go to Continuity Check. NO: Pump 1 (4-spool) control solenoid malfunction. Replace solenoid. – – –1/1 9001 10 46 2 Continuity Check Disconnect harness connectors from main controller (MCF) and pump 1 (4-spool) control solenoid. Check for continuity between main controller (MCF) connector A pin A22 and pump 1 (4-spool) control solenoid harness connector pin 1. Check for continuity between main controller (MCF) connector A pin A16 and pump 1 (4-spool) control solenoid harness connector pin 2. Is there continuity between the pins? YES: Go to Solenoid Function 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 3 Solenoid Function Check Switch pump 1 (4-spool) control solenoid with pump 2 (5-spool) control solenoid. Clear diagnostic trouble codes (DTC) and re-check for DTC. Does diagnostic trouble code follow pump 1 (4-spool) control solenoid? IMPORTANT: Pump learning procedure must be performed after removing or replacing pump control solenoids. YES: Pump 1 (4-spool) control solenoid malfunction. Replace solenoid. NO: Main controller (MCF) malfunction. Replace controller. See Main Controller (MCF) Remove and Install. (Group 9015-20.) – – –1/1