Case IH 15331 - AST – AST: PVED-CLS unit is running a spare part software

The steering controller is currently loaded with generic factory firmware rather than the machine-specific configuration, or has corrupted EEPROM configuration/metadata.

• MAXXUM T4E
• VESTRUM CVX
• Farmall (40, 45, 50 models with Cab and CVT)
• Puma (AFS Connect / PLM Intelligence)
• Magnum (AFS Connect)
• Optum (e.g., Optum T.7 CLS)
• Steiger / Quadtrac (MY2016 and newer with PVED-CLS)

1. 1

   Check the AST fault stack via the instrument cluster or AFS Pro display to confirm if 15331 is active alongside 15332, 15335, or 15336

2. 2

   Verify the power supply voltage at the controller terminals is stable (drops below 9V can cause memory read/write errors)

3. 3

   Verify if the PVED-CLS was recently replaced, as new parts will trigger this code until flashed with correct PLM metadata

1. 1

   Connect Diagnostic Tool

   Connect the Case IH Electronic Service Tool (EST) to the tractor's diagnostic port.

2. 2

   Flash the Controller

   If code 15331 is active, download the correct vehicle-specific PLM metadata and configuration software from the CNH eTIM/EST database and flash it to the PVED-CLS controller.

3. 3

   Evaluate EEPROM Integrity

   If EEPROM CRC failures (15332, 15335, 15336) persist after a successful software flash, the internal EEPROM of the PVED-CLS controller is physically damaged or permanently corrupted.

4. 4

   Replace the Actuator

   If the software update fails or the EEPROM is damaged, replace the PVED-CLS steering valve controller actuator.

5. 5

   Parameterize and Calibrate

   After installing a new PVED-CLS, use the EST to flash the correct software, parameterize the valve, and perform the steering angle sensor (SASA) and wheel angle sensor calibrations.

6. 6

   Clear Codes

   Clear all AST fault codes and test the auto-guidance/steering system to ensure the safe state has been lifted.