Case IH 15323 – PVED-CLS Main and/or Safety Controller: Steering valve controller - Too many errors

Triggered when the steering controller logs more than 5 errors simultaneously. Because there are too many errors to handle, the system flags this as a severe internal failure and forces the steering system into a safe state (lockout of electro-hydraulic steering functionality) to prevent erratic or unsafe steering behavior.

• Steiger T4B
• Steiger / Quadtrac series (e.g., 335, 350, 370, 380, 400, 420, 435, 450, 470, 485, 500, 535, 550, 580, 600, 620)
• Magnum series
• Puma series
• Farmall series (e.g., 40, 45, 50, 115U)
• Axial-Flow series

1. 1

   Connect a diagnostic tool (Case IH Electronic Service Tool or Danfoss PLUS+1) to read the fault stack and identify underlying root cause codes (e.g., CAN communication loss, sensor voltage drops, or internal buffer overflows)

2. 2

   Check the diagnostic LED on the PVED-CLS module to determine if the Main microcontroller is stuck in bootloader mode or in a severe safe state

3. 3

   Verify power and ground to the controller. Ensure voltage is between 11V and 35.5V, as drops below 9V or erratic power supply can cause multiple simultaneous errors

4. 4

   Inspect the 12-pin Deutsch connector (DT04-12PA-B016) at the PVED-CLS for moisture, corrosion, or backed-out pins

1. 1

   Resolve Root Errors

   Address the specific underlying faults found in the diagnostic stack (e.g., repairing a damaged CAN bus wire or replacing a shorted Wheel Angle Sensor).

2. 2

   Clear and Reset

   Clear the fault codes using the service tool. A hard reset (complete power cycle/battery disconnect) is required to bring the PVED-CLS out of its severe safe state.

3. 3

   Firmware Flash

   If the underlying errors point to a software interpolation overflow or an internal CAN Tx buffer overflow, use the Danfoss PLUS+1 Service Tool to reflash the firmware on both the Main and Safety Controllers.

4. 4

   Replace the Module

   If the module will not accept a flash, the LED remains in a severe fault state, or the internal hardware has failed, replace the PVED-CLS module or the entire steering valve assembly.

5. 5

   Recalibrate

   If the PVED-CLS or steering valve is replaced or flashed, you must perform an Auto Steering Calibration. This includes calibrating the Wheel Angle Sensor (WAS) and the hydraulic spool dead-bands.