Case IH 19724 – DCU (Dosing Control Unit): EEPROM / Checksum failures | EEPROM Detection error OR 'Codierwort error | P062F Internal Control Module EEPROM Error

The internal memory (EEPROM) of the control module has failed a checksum validation, is corrupted, or cannot be read.

• Tier 4a
• Case IH Magnum Series 235
• Case IH Magnum Series 250
• Case IH Magnum Series 265
• Case IH Magnum Series 280
• Case IH Magnum Series 295
• Case IH Magnum Series 310
• Case IH Magnum Series 315
• Case IH Magnum Series 325
• Case IH Magnum Series 340
• Case IH Magnum Series 355
• Case IH Magnum Series 380
• Case IH Magnum Series 400
• Case IH Steiger & Quadtrac Series 350
• Case IH Steiger & Quadtrac Series 370
• Case IH Steiger & Quadtrac Series 400
• Case IH Steiger & Quadtrac Series 420
• Case IH Steiger & Quadtrac Series 450
• Case IH Steiger & Quadtrac Series 470
• Case IH Steiger & Quadtrac Series 500
• Case IH Steiger & Quadtrac Series 540
• Case IH Steiger & Quadtrac Series 550
• Case IH Steiger & Quadtrac Series 580
• Case IH Steiger & Quadtrac Series 600
• Case IH Steiger & Quadtrac Series 620
• Case IH Combines 5150
• Case IH Combines 6140
• Case IH Combines 7140
• Case IH Combines 7240
• Case IH Combines 8240
• Case IH Combines 9240

1. 1

   Check for Module Mismatches: Verify the DCU calibration power rating perfectly matches the Engine ECU, especially if either was recently replaced.

2. 2

   Inspect Wiring and Power Supply: Check the wiring harness and connectors at the DCU for water intrusion, corrosion, or loose pins, as voltage spikes or poor grounds can cause EEPROM corruption.

3. 3

   Attempt a Software Flash: Connect the Case IH Electronic Service Tool (EST) and attempt to re-flash or update the DCU software before condemning the hardware.

1. 1

   Turn off ignition and disconnect battery

   Turn off the machine's ignition and disconnect the main battery to prevent electrical shorts.

2. 2

   Locate DCU

   Locate the Dosing Control Unit (DCU) / DEF Pump Module assembly on the machine.

3. 3

   Clean area

   Thoroughly clean the area around the module to prevent dirt from entering the DEF system.

4. 4

   Disconnect electrical connectors

   Carefully disconnect the electrical harness connectors from the DCU.

5. 5

   Disconnect DEF fluid lines

   If replacing the entire dosing pump assembly (which houses the DCU), disconnect the DEF fluid lines. Cap the lines immediately to prevent contamination.

6. 6

   Remove faulty DCU

   Unbolt the mounting hardware and remove the faulty DCU.

7. 7

   Install replacement DCU

   Install the replacement DCU and secure the mounting bolts.

8. 8

   Reconnect lines and connectors

   Reconnect the DEF lines and electrical connectors, ensuring the locking tabs click into place.

9. 9

   Reconnect battery

   Reconnect the battery.

10. 10

    Program/calibrate new DCU

    Connect the Case IH Electronic Service Tool (EST). The new DCU is blank and must be programmed/calibrated to the specific vehicle so it can communicate with the Engine ECU.

11. 11

    Clear codes and verify

    Clear all inactive fault codes and run the engine under load to verify the SCR system is operating properly and the code does not return.