Case IH 51147 – Remote AUX Controller / Armrest Controller: Invalid Software Instruction Executed

This is an internal logic or memory error indicating that the module's microprocessor attempted to read or execute a line of software code that was corrupt, unrecognized, or invalid.

• MX Magnum
• Case IH MX Series
• Case IH TG Series
• Case IH Steiger Series
• Case IH Puma 125

1. 1

   Connect an electronic service tool to determine if the code is active or if it was a one-time stored glitch

2. 2

   Check the current software version on the AUX/Armrest controller, as software instruction errors are often patched by the manufacturer via software updates

3. 3

   Check for accompanying controller memory errors (such as loss of hitch/auxiliary calibration data or remote timer information), which indicate the controller's flash memory is failing

1. 1

   Clear and Retest

   Clear the fault code using the diagnostic service tool. Cycle the key power and operate the auxiliary remote valves to see if the code returns.

2. 2

   Re-flash the Controller

   If the code is hard-set or returns immediately, use the electronic service tool to re-flash the Remote AUX Controller with the latest OEM software calibration.

3. 3

   Replace the Controller

   If the controller refuses to accept the software flash, or if the 'Invalid Software Instruction Executed' code persists after a successful flash, the controller's internal memory/processor is physically damaged. The controller must be replaced.

4. 4

   Re-calibrate

   Whether the controller was re-flashed or replaced, you must perform a full calibration procedure for the auxiliary valves and armrest controls before returning the tractor to service.