11412.04 Hydraulic Fan Pump Solenoid Valve Feedback Current Low MS12501,0000061 –19–14JAN06–1/1 TM2361 (24JUN08) 9001-10-47 450DLC Excavator Operation and Tests 062608 PN=71 Main Controller (MCF) Diagnostic Trouble Codes Hydraulic Fan Pump Control Solenoid Diagnostics Hydraulic fan pump control solenoid current 920 mA or higher. – – –1/1 9001 10 47 1 Solenoid Resistance Check Disconnect harness connector from fan pump control solenoid. Check resistance of solenoid. Is resistance between 14—21 ohms? YES: Go to Continuity Check. NO: Fan pump control solenoid malfunction. Replace solenoid.
– – –1/1 2 Continuity Check Disconnect harness connectors from main controller (MCF) and fan pump control solenoid. Check for continuity between main controller (MCF) connector A pin A9 and fan pump control solenoid harness connector pin 1. Check for continuity between main controller (MCF) connector A pin A15 and fan pump 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 fan pump control solenoid with pump 2 (5-spool) control solenoid. Clear diagnostic trouble codes (DTC) and re-check for DTC. Does diagnostic trouble code follow fan pump control solenoid? IMPORTANT: Pump learning procedure must be performed after removing or replacing pump control solenoids. YES: Fan pump control solenoid malfunction. Replace solenoid. NO: Main controller (MCF) malfunction. Replace controller. See Main Controller (MCF) Remove and Install. (Group 9015-20.) – – –1/1