Case IH 2200 – ZDC: ZDC - CAN message FE timeout

Communication failure on the tractor's Controller Area Network (CAN) bus. The ZDC module expected to receive a designated CAN message (identified by the hex value 'FE') within a programmed timeframe, but the message timed out. This means the module broadcasting the 'FE' message has either stopped transmitting, or the physical CAN bus wiring is preventing the message from reaching the ZDC.

• Steiger T4B
• Case IH Steiger CVT
• Case IH Magnum CVT
• Case IH Puma CVT
• Case IH Optum CVT

1. 1

   Disconnect the tractor's battery and measure the resistance across the CAN High and CAN Low pins at the diagnostic port (a healthy CAN bus should read exactly 60 ohms)

2. 2

   If the resistance reading is 120 ohms, check for a missing, unplugged, or failed terminating resistor

3. 3

   If the resistance reading is open (infinite resistance), check for a hard break in the wiring

4. 4

   Locate the ZDC controller and visually inspect the wiring harness connectors for pushed pins, corrosion, or water intrusion

5. 5

   Verify that the ZDC module is receiving proper battery voltage and has a clean ground connection (check the 5A or 7.5A switched key fuse)

1. 1

   Disconnect Power

   Turn off the ignition and disconnect the negative battery cable to prevent electrical spikes.

2. 2

   Isolate the Fault

   Based on the resistance test above, trace the CAN bus backbone. If the resistance was 120 ohms, locate the terminating resistors (one is often internal to the Engine ECU, while the other is an external plug on the harness).

3. 3

   Repair Wiring/Resistors

   If a terminating resistor is faulty or missing, plug in a replacement 120-ohm resistor. If a wire is chafed or broken (causing an open circuit), splice and seal the CAN High or CAN Low wire using an approved OEM harness repair kit.

4. 4

   Check the Sending Module

   If the wiring and resistors are perfectly intact (60 ohms), the module responsible for broadcasting message 'FE' may be offline. Check the fuses for the Cab Controller and Engine ECU.

5. 5

   Software/Module Replacement

   If all physical layer checks pass, the ZDC module may require a software re-flash by a dealer using the CNH Electronic Service Tool (EST). If the module has suffered an internal hardware failure, it must be replaced and programmed to the tractor.

6. 6

   Clear Codes

   Reconnect the battery, cycle the key, and use a diagnostic tool to clear the inactive 2200 fault code.