Case IH 19365 – Engine Control Module (ECM) or Vehicle Control Module (VCM): CAN-Receive-Frame PRODPM1 (HCI dosing quantity, dosing request status)

CAN bus communication timeout or data length error. The engine or vehicle control module has lost communication with the Departronic System (HCI dosing unit used for DPF regeneration) and is no longer receiving the PRODPM1 proprietary CAN message.

• Tier 4b
• Case IH Puma series tractors
• Case IH Optum series tractors
• Case N-Series Tractor Loader Backhoes (TLBs)

1. 1

   Verify if the HCI Dosing Unit (Departronic module) is online and visible to the diagnostic scan tool on the CAN network

2. 2

   Check the CAN bus wiring between the HCI dosing unit and the ECM/VCM for disconnected cables, broken wires, or short circuits

3. 3

   Verify that the HCI dosing unit is receiving proper operating voltage and has a clean ground connection

4. 4

   Test the CAN High and CAN Low resistance at the dosing unit connector to ensure the network is intact (typically 60 ohms across the network)

1. 1

   Power Down

   Turn off the machine and disconnect the battery to prevent electrical spikes during harness testing.

2. 2

   Inspect Connectors

   Locate the HCI Dosing Unit (Departronic module) mounted near the exhaust/DPF system. Disconnect its main harness connector and inspect for water intrusion, corrosion, or pushed-back pins. Clean and reseat if necessary.

3. 3

   Test the Harness

   Using a multimeter, perform a continuity test on the CAN High and CAN Low wires from the HCI dosing unit connector back to the ECM/VCM. Repair any open circuits or shorts to ground/power.

4. 4

   Replace the Dosing Unit

   If the wiring harness, power, and ground are all verified as good, the internal CAN controller of the HCI dosing unit has likely failed. The unit must be replaced.

5. 5

   Reassemble and Clear Codes

   Reconnect the battery, install the new dosing unit (if applicable), and use a diagnostic tool to clear the 19365 fault code.

6. 6

   Validation

   Run the engine and monitor the HCI dosing status via the scan tool to ensure the PRODPM1 CAN frame is actively broadcasting and no timeout errors return.