Case IH 4329 – EHR (Electronic Hydraulic Remote) Controller / Central Controller: Rear remote no. 8 - no control message received

Communication failure on the tractor's CAN BUS network. The control module is failing to receive the expected electronic control messages from the Electronic Hydraulic Remote (EHR) valve #8.

• Magnum
• Steiger T4B
• Puma

1. 1

   Inspect connector C208 at the rear remote #8 to ensure it is fully seated, wires are not damaged or chafed, pins are in the correct position, and terminal fit is tight.

2. 2

   Test the CAN BUS voltage at the remote harness connector C208 with the ignition ON. Measure voltage at C208 Pin 2 (Green) to chassis ground (expected 2.2 - 2.5 V).

3. 3

   Measure the voltage at C208 Pin 3 (Yellow) to chassis ground to verify the other side of the CAN communication line.

4. 4

   Verify the CAN BUS wiring continuity between the rear remotes and the central controller.

1. 1

   Resolve Wiring Issues

   If the diagnostic checks reveal out-of-spec voltages, damaged pins, or broken wires, repair or replace the affected section of the wiring harness or connector C208.

2. 2

   Replace the EHR Valve

   If the harness and CAN BUS voltages test within specification but the module still cannot communicate with remote #8, the EHR valve's internal electronics have likely failed and the valve must be replaced.

3. 3

   Software Reload (If Necessary)

   If the valves remain inoperative after wiring repairs and valve checks, reload the software into the central controller. If it is still inoperative after a re-flash, the central processor may need to be replaced.

4. 4

   Clear and Test

   Once the root cause has been rectified, use the Electronic Service Tool to clear the error code and test the hydraulic system for normal operation.