Case IH 520444.02 - ACML – ACML: RAM check, unexpected value

Internal memory (RAM) failure where the control module is reading an unexpected value during its self-diagnostic memory check.

• MAXXUM T4E
• VESTRUM CVX
• MAXXUM 135 - MULTICONTROLLER ACTIVEDRIVE 8 TRACTOR - STAGE V

1. 1

   Verify stable battery voltage and check for voltage drops

2. 2

   Perform a hard reset by disconnecting battery power to the module

3. 3

   Check if a software flash or update is available from the dealer

1. 1

   Replace ACML module

   If the code persists after preliminary checks, replace the ACML module as it has likely suffered an internal hardware failure.