Case IH 518436-02 - ACM – ACM: Radio display shortcut switch circuit fault

The system is detecting an erratic or out-of-range electrical signal on the circuit dedicated to the shortcut switch that controls the radio display.

• MAGNUM AFS Connect

1. 1

   Verify the fault code status (Active vs. Inactive/Stored)

2. 2

   Inspect the physical 'Shortcut Switch' on the armrest console for sticking, physical damage, or liquid intrusion

3. 3

   Check the wiring harness between the shortcut switch cluster and the Armrest Controller Module (ACM) for shorts to ground, shorts to power, or open circuits

4. 4

   Verify the CAN bus communication lines to the ACM