Main Controller (MCF) Diagnostic Trouble Codes TM2361 (24JUN08) 9001-10-89 450DLC Excavator Operation and Tests 062608 PN=113 14 ECM Short to Key Switch Signal Check Disconnect all connectors to main controller (MCF), information controller (ICF), engine control module (ECM) and monitor controller. Check for continuity between engine control module (ECM) pin 18 (CAN High wire) and engine control module (ECM) pin 24 (key switch signal wire). Check for continuity between engine control module (ECM) pin 37 (CAN Low wire) and engine control module (ECM) pin 24 (key switch signal wire). Is there continuity between CAN circuit and key switch signal circuit? YES:
CAN circuit short to key switch signal. Repair or replace harness. See Cab Harness (W1) Wiring Diagram and see Machine Harness (W2) Wiring Diagram. (Group 9015-10.) NO: Go to ICF Short to Key Switch Signal Check. – – –1/1 9001 10 89 15 ICF Short to Key Switch Signal Check Disconnect all connectors to main controller (MCF), information controller (ICF), engine control module (ECM) and monitor controller. Check for continuity between information controller (ICF) pin C5 and C7. Check for continuity between information controller (ICF) pin C11 and C7. Is there continuity between CAN circuit and key switch signal circuit? YES: CAN circuit short to key switch signal. Repair or replace harness.
See Cab Harness (W1) Wiring Diagram. (Group 9015-10.) NO: Go to Monitor Controller Short to Key Switch Signal Check. – – –1/1 16 Monitor Controller Short to Key Switch Signal Check Disconnect all connectors to main controller (MCF), information controller (ICF), engine control module (ECM) and monitor controller. Check for continuity between monitor controller pin B7 and A7. Check for continuity between monitor controller pin B6 and A7. Is there continuity between CAN circuit and key switch signal circuit? YES: CAN circuit short to key switch signal. Repair or replace harness. See Cab Harness (W1) Wiring Diagram and see Monitor Harness (W3) Wiring Diagram. (Group 9015-10.) NO:
Go to MCF CAN High and Low Side Continuity Check. – – –1/1 17 MCF CAN High and Low Side Continuity Check Disconnect all connectors to main controller (MCF), information controller (ICF), engine control module (ECM) and monitor controller. Check for continuity between main controller (MCF) pins C4 and C15. Is there continuity between CAN high and low side wires? YES: CAN wires short circuit. Repair or replace harness. See Cab Harness (W1) Wiring Diagram. (Group 9015-10.) NO: Go to ECM CAN High and Low Side Continuity Check. – – –1/1