Case IH 517673-14 - ACM – ACM: Incorrect PTO keypad configuration

The control module is detecting a configuration mismatch, an unrecognized switch state, or a communication error regarding the Power Take-Off (PTO) keypad setup.

• MAGNUM AFS Connect
• Magnum 180
• Magnum 190
• Magnum 200
• Magnum 210
• Magnum 220
• Magnum 225
• Magnum 235
• Magnum 240
• Magnum 260
• Magnum 290
• Magnum 340
• Steiger 350
• Steiger 500
• Steiger 600
• Puma 145
• Puma 175 CVX
• Puma 200 CVT
• Maxxum 115

1. 1

   Check for related communication codes (e.g., 1012 or 2818) that indicate a complete loss of communication with the Armrest Control Module.

2. 2

   Inspect fuses related to the PTO controller and armrest (e.g., Fuse 38). If a fuse fails immediately when the PTO switch is turned on, it indicates a short to ground.

3. 3

   Verify that the Tractor Control Unit (TCU) and ACM connectors are fully seated, undamaged, and that the pins are in the correct position.

4. 4

   Inspect the PTO switch wiring for shorts to ground, shorts to power, or open circuits.

1. 1

   Document and clear codes

   Make a note of all active error codes, clear them, and test the system for normal operation to see if the fault returns.

2. 2

   Inspect physical connections

   If the fault is still present, inspect all TCU and ACM connectors for physical damage, moisture, or loose pins.

3. 3

   Test wiring harness

   Inspect the wiring harness between the PTO keypad/switch and the ACM for excessive resistance, bent, spread, corroded, or loose terminals.

4. 4

   Verify configuration

   Use the Case IH Electronic Service Tool (EST) or a compatible diagnostic tool (like Jaltest) to check the system parameter configuration. Ensure the PTO keypad is configured correctly for the tractor's specific installed options.

5. 5

   Replace components

   If the configuration is correct and the wiring is intact, the issue is likely an internal failure. Replace the faulty PTO switch/keypad or the Armrest Control Module (ACM).