Case IH 15203 - AST – AST (Advanced Steering Technology) / Steering Valve Controller (SVC): Steering valve controller failure - Software RAM code test failed

The internal Random Access Memory (RAM) within the steering controller has failed its self-diagnostic software test, pointing to either a software corruption issue or a physical failure of the memory chips inside the controller.

• MAXXUM T4E
• VESTRUM CVX
• AFS Connect Magnum Tractors (Models 180, 200, 220, 240, 250, 280, 310, 340, 380)
• Vestrum CVX Series Tractors (Models 100, 110, 120, 130)
• Farmall Tractors (Models 40, 45, 50)

1. 1

   Enter the diagnostic mode by navigating the 'H' menus using the switches on the instrument cluster

2. 2

   Navigate to the R1 module, menu H3

3. 3

   Select the AST system and press the dimming key to accept the menu selection

4. 4

   Verify the lower LCD section of the display shows 'ch - - ' to indicate you are in the correct subsystem to read active AST faults

1. 1

   Software Reflash

   Attempt to re-flash the Steering Valve Controller (SVC) with the latest OEM software version (e.g., Version 2.02) using the Case IH Electronic Service Tool (EST).

2. 2

   Module Replacement

   If the software update fails or the RAM code test continues to fail immediately after a reflash, the internal memory hardware is permanently damaged. The Steering Valve Controller unit itself must be replaced and subsequently programmed with the correct dataset for the specific tractor model.