Case IH 518413-19 - ACM – ACM: Navigation encoder keypad disconnected

This indicates a loss of communication or a physical electrical disconnection between the navigation encoder keypad (the turn-and-press dial used to navigate the AFS Pro 1200 display) and the armrest's internal network.

• MAGNUM AFS Connect
• Magnum AFS Connect Series
• Steiger AFS Connect Series
• Quadtrac AFS Connect Series
• Optum AFS Connect Series

1. 1

   Connect the Case IH Electronic Service Tool (EST) to the vehicle to confirm that 518413-19 is currently active.

2. 2

   Remove the covers of the Multicontroller armrest to access the internal components.

3. 3

   Inspect the wiring harness and CAN cables connecting the navigation encoder keypad to the ACM.

4. 4

   Check for loose, backed-out, or corroded pins at the connector for the encoder keypad and the corresponding port on the ACM.

5. 5

   Verify that the ACM is receiving proper power and ground (Pin 1 - UNSW B+, Pin 2 - SWB+, Pin 7 - GND) and that the internal armrest CAN bus is intact.

1. 1

   Turn off the tractor and disconnect the battery to prevent electrical shorts.

2. 2

   Carefully remove the outer housing/trim of the Multicontroller armrest to expose the ACM and the underside of the control dials.

3. 3

   Locate the navigation encoder keypad (the turn-and-press dial) and trace its wiring harness to the Armrest Control Module (ACM).

4. 4

   Reconnect any loose or disconnected plugs. If corrosion is present, clean the contacts with an approved electrical contact cleaner and apply dielectric grease.

5. 5

   If the wiring harness is pinched, chafed, or broken, repair the damaged section of the wire or replace the internal armrest harness.

6. 6

   If the wiring and connections are verified to be in good condition but the fault persists, the navigation encoder keypad itself has likely failed internally and must be replaced.

7. 7

   Reassemble the armrest housing.

8. 8

   Reconnect the battery, power on the tractor, and use the EST to clear the fault codes. Test the encoder dial to ensure it successfully navigates the AFS Pro 1200 display.