Case IH 520368-02 - PCM – PCM: CAN-1 data erratic, intermittent or incorrect

The module is detecting unstable, missing, or corrupted data communication on the CAN-1 network bus.

• MAGNUM AFS Connect
• Magnum AFS Connect (e.g., Magnum 400)
• Steiger / Quadtrac AFS Connect
• Optum AFS Connect
• Puma AFS Connect (models 185 and above)
• Axial-Flow Combines (160, 250, 260, and AF Series)
• Patriot 50 Series Sprayers
• Austoft 9000 Series Sugar Cane Harvesters

1. 1

   Access the 'Faults and Warnings' menu on the AFS Pro 1200 monitor to determine if the code is currently 'Active' or 'Inactive'

2. 2

   Clear the inactive fault codes to see if the error returns, as it may have been a temporary communication glitch

3. 3

   Inspect the CAN-1 network connections routing to the PCM (such as connector X-017 CAN 1 or X-105 CAN1 to the C Pillar) for physical damage or loose pins

4. 4

   Verify the diagnostic connector (Type 2 green connector for CAN 500 Kbps on AFS Connect models) to ensure proper communication with the Electronic Service Tool (EST)

1. 1

   Check the AFS Pro 1200 display and clear the code if it is inactive.

2. 2

   If the code remains active, physically inspect the CAN-1 wiring harness and connectors routing to the PCM.

3. 3

   Repair any damaged wiring, corrosion, or loose connections found in the CAN-1 lines.

4. 4

   If the wiring is fully intact and the fault persists, the PCM module itself has likely failed internally and requires replacement.

5. 5

   Install the replacement PCM.

   Ensure the EST (Electronic Service Tool) is updated with the latest software/firmware to properly configure and activate the new telematics module.