Case IH 518049-09 - ACM – ACM: Incorrect configuration of the differential lock keypad

A software/network configuration mismatch regarding the differential lock keypad.

• MAGNUM AFS Connect

1. 1

   Connect the Case IH Electronic Service Tool (EST) and scan for all DTCs. If multiple -19 codes are present across different armrest components (e.g., 518413-19, 518431-19), the entire armrest harness or a main connector may have been unplugged while the machine was on.

2. 2

   Inspect the wiring harness and connector leading directly to the differential lock keypad on the armrest to ensure it is securely seated and undamaged.

3. 3

   If the -09 code is active, verify the ACM configuration settings via the EST to ensure the differential lock keypad is properly enabled and recognized by the module.

1. 1

   Power Down

   Turn off the tractor and disconnect battery power if inspecting physical connections to prevent further -19 (disconnected while powered on) codes from logging.

2. 2

   Secure Connections

   Reconnect or firmly seat the differential lock keypad connector inside the armrest console.

3. 3

   Reconfigure the ACM

   Use the Case IH EST to navigate to the ACM module settings and correct the configuration profile for the differential lock switch/keypad.

4. 4

   Clear Codes

   Reconnect the EST, clear the inactive fault codes from the ACM memory, and cycle the key to verify the code does not return.