Main Controller (MCF) Diagnostic Trouble Codes 11402.04 Boom Flow Rate Solenoid (SF) Valve Feedback Current Low MS12501,0000059 –19–14JAN06–1/1 Boom Flow Rate Solenoid (SF) Diagnostics Boom flow rate solenoid (SF) current 56 mA or less. –1/1 TM2361 (24JUN08) 9001-10-39 450DLC Excavator Operation and Tests 062608 PN=63 3 Solenoid Function Check Switch boom flow rate solenoid (SF) harness connector with another solenoid valve in solenoid valve manifold. Clear diagnostic trouble codes (DTC) and re-check for DTC. Does diagnostic trouble code stay with boom flow rate solenoid (SF)? YES: Boom flow rate solenoid (SF) malfunction. Replace solenoid. NO: Main controller (MCF) malfunction.
Replace controller. See Main Controller (MCF) Remove and Install. (Group 9015-20.) – – –1/1 9001 10 39 1 Solenoid Resistance Check Disconnect harness connector from boom flow rate solenoid (SF). Check resistance of solenoid. Is resistance between 14.8—22.2 ohms? YES: Go to Continuity Check. NO: Boom flow rate solenoid (SF) malfunction. Replace solenoid. – – –1/1 2 Continuity Check Disconnect harness connectors from main controller (MCF) and boom flow rate solenoid (SF). Check for continuity between main controller (MCF) connector A pin A20 and boom flow rate solenoid (SF) harness connector pin 1.
Check for continuity between main controller (MCF) connector A pin A3 and boom flow rate solenoid (SF) 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 Control Valve Harness (W7) Wiring Diagram. (Group 9015-10.) – – –1/1