Case IH 15304 - AST – AST (Auxiliary Steering / Auto-Steering) / Steering Valve Controller: Incorrect steering valve controller configuration - vehicle geometry configuration checksum

This fault indicates that the steering valve controller has detected a checksum error within its programmed vehicle geometry configuration. The stored parameters that define the physical dimensions of the tractor (which are critical for auto-guidance and auxiliary steering) are corrupted, missing, or mismatched, causing the checksum validation to fail.

• MAXXUM T4E
• VESTRUM CVX
• Case IH Farmall 40, 45, and 50 Tractors
• Case IH Farmall 115U Efficient Power Tractors

1. 1

   Connect to the tractor's diagnostic connections as outlined in the MTA CCM & APH Stage V MR manual.

2. 2

   Check for accompanying codes (such as 15305, 15307, 15309, and 15311) that might indicate a total memory wipe or broader configuration failure.

3. 3

   Verify ECU identifiers to ensure the steering valve controller is communicating properly with the rest of the CAN bus.

1. 1

   Connect the official Case IH diagnostic tool (EST) to the machine's diagnostic port.

   Connect the official Case IH diagnostic tool (EST) to the machine's diagnostic port.

2. 2

   Navigate to the AST / Steering Valve Controller module.

   Navigate to the AST / Steering Valve Controller module.

3. 3

   Access the vehicle geometry configuration settings.

   Access the vehicle geometry configuration settings.

4. 4

   Re-enter or reload the correct vehicle geometry parameters.

   Re-enter or reload the correct vehicle geometry parameters (such as wheelbase, track width, and antenna offsets) specific to the tractor model.

5. 5

   Execute the calibration procedures for the steering components.

   Execute the calibration procedures for the steering components as specified in the service manual.

6. 6

   Save the configuration to generate a new, valid checksum.

   Save the configuration to generate a new, valid checksum.

7. 7

   Cycle the key/power to reboot the controller.

   Cycle the key/power to reboot the controller and verify that fault code 15304 does not return.