Case IH 15215 - AST – AST (Advanced Steering / Auto Guidance) / PVED-CLS: Steering valve controller failure - coil supply switch self-test failed

This fault code indicates an internal hardware or safety-check failure within the electro-hydraulic steering valve controller. The controller performs an internal self-test on the coil supply switch before enabling auto-guidance. If this self-test fails, the system prevents the auto-steering from engaging to ensure the machine does not make uncommanded steering movements.

• MAXXUM T4E
• VESTRUM CVX
• Steiger
• Quadtrac (350, 370, 500, 550, 580, 600, 620)
• Magnum
• Puma
• Axial-Flow (7230, 8230, 9230, 250 series)

1. 1

   Inspect the wiring harness and connectors going to the PVED-CLS steering valve actuator for damaged wires, corrosion, or pushed-out pins.

2. 2

   Verify that the PVED-CLS module is receiving stable and correct system voltage (12V) and has a clean ground connection, as a severe voltage drop can trigger false internal switch failures.

3. 3

   Connect the Case IH Electronic Service Tool (EST) or Danfoss PLUS+1 Service Tool to check the off-road safety check status and verify if the fault is active or stored.

4. 4

   If the wiring, power, and CAN communication are fully intact and the code remains active, the internal coil supply switch has failed and the PVED-CLS module must be replaced.

1. 1

   Preparation

   Park the machine on a level surface, turn off the engine, relieve hydraulic pressure by turning the steering wheel back and forth, and disconnect the battery.

2. 2

   Disconnect

   Locate the steering valve assembly. Disconnect the main electrical harness connector from the PVED-CLS module.

3. 3

   Removal

   Remove the mounting screws securing the black PVED-CLS electronic module to the hydraulic steering valve body. Carefully lift the module off the valve.

4. 4

   Installation

   Ensure the mating surface on the valve body is clean. Install the new PVED-CLS module and tighten the mounting screws to the OEM torque specification.

5. 5

   Reconnection

   Reconnect the electrical harness to the module and reconnect the machine's battery.

6. 6

   Programming & Calibration

   Use the Case IH EST (or Danfoss PLUS+1 Service Tool) to flash the correct firmware for your specific machine, load the machine-specific hydraulic configuration parameters, and perform the Auto Steering Calibration Mode.