Case IH 15277 – Steering Valve Controller: Steering control message crosscheck between the steering valve main and safety controllers failed.

This fault code triggers when the Main and Safety internal microprocessors in the Danfoss PVED-CLS controller disagree on steering control messages, flow commands, or if there is an internal communication failure between them. This often happens if the gain parameters are not equal in the Main and Safety controllers, or if there is a severe internal hardware failure.

• Steiger T4B
• Case IH Steiger series (385, 435, 450, 500, 580)
• Case IH Magnum series
• Case IH Puma and Optum series
• Case IH Axial-Flow Combines

1. 1

   Bleed the steering system by turning the steering wheel fully left and fully right a minimum of 10 times to ensure no air is causing erratic valve behavior.

2. 2

   Connect the Case IH diagnostic tool (AFS Pro display or Autopilot Toolbox) and verify that the gain parameters are equal in both the Main and Safety controllers.

3. 3

   Inspect the CAN bus communication wiring and the DC power supply (12V/24V) to the PVED-CLS controller for intermittent power drops.

4. 4

   Check for accompanying codes such as 15278 (Spool position crosscheck failed) or 15279 (Steering wheel sensor speed crosscheck failed) to isolate sensor input issues.

1. 1

   Recalibrate the Steering System

   If the diagnostic check reveals a parameter mismatch, perform an Auto Steering Calibration. Danfoss recommends performing this calibration on an on-road surface (unpainted concrete or asphalt).

2. 2

   Depressurize the System

   If calibration fails or the code returns immediately (indicating a severe internal failure of the PVED-CLS controller), the steering valve assembly must be replaced. Turn off the machine and relieve all hydraulic pressure from the steering system.

3. 3

   Disconnect Electricals

   Disconnect the CAN bus and power harnesses from the PVED-CLS controller on the steering valve.

4. 4

   Remove the Valve

   Mark and disconnect the hydraulic lines attached to the steering control valve. Unbolt the valve assembly from its mounting bracket.

5. 5

   Install the New Valve

   Mount the replacement steering valve assembly. Reconnect the hydraulic lines and electrical connectors.

6. 6

   Bleed the Hydraulics

   Start the machine and bleed the steering system by turning the steering wheel lock-to-lock at least 10 times until no abnormal noise or vibration occurs.

7. 7

   Flash and Calibrate

   Use the diagnostic tool to flash the correct tractor-specific software to the new PVED-CLS controller and perform a full Auto Steering Calibration routine.