518020-02 - DEC

Case IH 518020-02 - DEC – DEC: CAN VB2 VCM Heartbeat Message Data Erratic

Issue description

CAN VB2 VCM (Vehicle Control Module) heart beat message data is erratic, intermittent, or incorrect, or the heartbeat message is being received from the network with an error.

Applies to these machines

  • MAGNUM AFS Connect
  • Magnum 400 AFS Connect
  • Magnum 180 AFS Connect
  • Magnum 200 AFS Connect
  • Magnum 220 AFS Connect
  • Magnum 240 AFS Connect
  • Magnum 250 AFS Connect
  • Magnum 280 AFS Connect
  • Magnum 310 AFS Connect
  • Magnum 340 AFS Connect
  • Magnum 380 AFS Connect

Check the cause

  1. Isolate other controllers on the CAN bus (such as a faulty hydraulic controller) to see if the communication error clears, as a secondary module may be overloading the CAN bus.

Repair steps

  1. Diagnose CAN bus

    Diagnose the CAN bus network integrity between the VCM and the DEC.

  2. Check for software updates

    Check for software updates (e.g., DEC software version 1.3.0.0).

  3. Replace faulty module

    Replace the faulty module disrupting the CAN VB2 network.

Parts you might need

(3)
  • Driveline Electronic Control (DEC) Module

    Software part numbers 51685729 and 51635992 are referenced for Tier 4B Magnum models

  • Vehicle Control Module (VCM)

  • CAN Bus Wiring Harness

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