Case IH 15972 - 13 - CSM – CSM: Vehicle controller - cab suspension communication fault with vehicle controller

The CAN bus communication link between the Cab Suspension Module (CSM) and the main Vehicle Controller has been interrupted, timed out, or failed to handshake properly.

• MAGNUM AFS Connect
• AFS Connect Magnum Series (180, 200, 220, 240, 250, 280, 310, 340, 380)
• Puma Series (195, 210)
• Maxxum Series (120)
• Steiger Series

1. 1

   Check the wiring harness between the Cab Suspension Module and the Vehicle Controller for physical damage, carbon tracking, or melted housings.

2. 2

   Inspect the CSM connectors for loose pins, oxidized terminals, or moisture intrusion.

3. 3

   Check for system overvoltage or undervoltage codes (e.g., TRM30), as voltage drops or spikes will intentionally block module communication and trigger CAN timeouts.

4. 4

   Ensure the CSM software is communicating properly with the Vehicle Controller and check for software/firmware mismatches.

1. 1

   Disconnect battery

   Disconnect the battery to protect the CAN network.

2. 2

   Inspect CSM connector

   Locate the Cab Suspension Module (CSM) and inspect the main harness connector.

3. 3

   Test CAN wires

   Test the CAN High and CAN Low wires for continuity between the CSM and the Vehicle Controller.

4. 4

   Repair wiring

   Repair any broken wires or replace damaged connector pins.

5. 5

   Replace and flash CSM

   If the harness is intact and power/ground are verified, replace the CSM and flash with the correct software via the Electronic Service Tool (EST).