TM2361 (24JUN08) 9001-10-111 450DLC Excavator Operation and Tests 062608 PN=135 Main Controller (MCF) Diagnostic Trouble Codes 11989.03 — Boom Mode Solenoid (SC) Valve Feedback Current High MS12501,0000077 –19–24JAN06–1/1 9001 10 ,111 Boom Mode Solenoid (SC) Diagnostics Boom mode solenoid (SC) current 920 mA or higher. – – –1/1 1 Solenoid Resistance Check Disconnect harness connector from boom mode solenoid (SC). Check resistance of solenoid. Is resistance between 14.8—22.2 ohms? YES: Go to Continuity Check. NO: Boom mode solenoid (SC) malfunction. Replace solenoid. – – –1/1 2 Continuity Check Disconnect harness connectors from main controller (MCF) and boom mode solenoid (SC).
Check for continuity between main controller (MCF) connector A pin A10 and boom mode solenoid (SC) harness connector pin 1. Check for continuity between main controller (MCF) connector A pin A6 and boom mode solenoid (SC) 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 3 Solenoid Function Check Switch boom mode solenoid (SC) 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 mode solenoid (SC)? YES: Boom mode solenoid (SC) malfunction. Replace solenoid. NO: Main controller (MCF) malfunction. Replace controller. See Main Controller (MCF) Remove and Install. (Group 9015-20.) – – –1/1