Case IH 15315 – Steering Valve Controller (SVC): Steering valve controller failure - VPS configuration data checksum incorrect

This fault code indicates that the configuration data stored for the VPS (Valve Positioning Sensor / Vehicle Positioning System) within the steering system has failed its checksum validation, meaning the configuration data file is corrupted, invalid, or mismatched with the controller's expected parameters.

• Steiger T4B
• Case IH AFS Connect Magnum Series 180, 200, 220, 240, 250, 280, 310, 340, 380
• Case IH Vestrum CVX Series 100, 110, 120, 130
• Case IH Optum / Steyr TERRUS Series 6250, 6270, 6300
• Case IH Farmall Series 40, 45, 50, 115U

1. 1

   Verify recent service history: Check if the tractor recently underwent a software update, battery replacement, or jump-start, as voltage spikes or interrupted software flashes are common causes of EEPROM checksum corruption.

2. 2

   Check battery and system voltage: Ensure the tractor's batteries are fully charged and the alternator is outputting correct voltage. Low voltage during controller boot-up can cause memory read errors.

3. 3

   Inspect harness connections: Inspect the wiring harness and connectors at the Steering Valve Controller for moisture, corrosion, or loose pins that could disrupt CAN bus communication during data initialization.

4. 4

   Read software versions: Use the CNH Electronic Service Tool (EST) to verify the current software version of the SVC and the Advanced Steering Configuration dataset.

1. 1

   Connect Diagnostic Tool

   Connect the CNH Electronic Service Tool (EST) to the tractor's 9-pin diagnostic connector.

2. 2

   Backup Existing Data

   If possible, attempt to back up any existing vehicle geometry and steering calibration data before proceeding.

3. 3

   Perform EOL Programming / Reflash

   Navigate to the Steering Valve Controller (SVC) in the EST. You will need to re-flash the controller with the correct Advanced Steering Configuration dataset (e.g., dataset version 3.2) to overwrite the corrupted memory.

4. 4

   Re-calibrate Steering System

   Once the configuration data is successfully written, perform a full steering system calibration. This includes the auto-calibration configuration, steering wheel configuration, and vehicle geometry configuration.

5. 5

   Clear Faults and Test

   Clear the 15315 fault code. Cycle the ignition key off for 30 seconds, then turn it back on.

6. 6

   Hardware Replacement (If Necessary)

   If the EST cannot communicate with the SVC to reflash it, or if the 15315 code returns immediately after a successful flash and key cycle, the internal EEPROM/memory of the Steering Valve Controller has failed physically. The controller (or the entire steering valve assembly, depending on the model) must be replaced.