Main Controller (MCF) Diagnostic Trouble Codes TM2361 (24JUN08) 9001-10-83 450DLC Excavator Operation and Tests 062608 PN=107 18 ECM 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 engine control module (ECM) pin 18 (CAN High and Low wires). 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 and see Machine Harness (W2) Wiring Diagram. (Group 9015-10.) NO: Go to ICF CAN High and Low Side Continuity Check.
– – –1/1 9001 10 83 19 ICF 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 information controller (ICF) pins C5 and C11. 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 Monitor Controller CAN High and Low Side Continuity Check.
– – –1/1 20 Monitor Controller 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 monitor controller pins B6 and B7. 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 and see Monitor Harness (W3) Wiring Diagram. (Group 9015-10.) NO: Go to MCF CAN Resistance Check. – – –1/1 21 MCF CAN Resistance Check Connect all connectors except main controller (MCF) connector C (X30). Check resistance between pin C4 and C15. Is resistance between 50—70 Ω? YES:
Go to DTC Check. NO: Go to ICF CAN Resistance Check. – – –1/1