Case IH 18303 – ACML: CRPM Increase switch: PB_UserCmd2_Full_06.CRPM_FineTuneUpSw CAN signal from ACML - error state

The CAN signal for the Constant RPM (CRPM) increase switch is in an error state as received or processed by the Armrest Control Module (ACML).

• VESTRUM CVX
• Maxxum Series
• Puma Series
• Magnum Series
• Steiger Series

1. 1

   Verify the physical operation of the Constant RPM rocker switch on the armrest

2. 2

   Check the wiring harness and electrical connections between the CRPM switch and the Armrest Control Module (ACML) for shorts, opens, or crushed wires

3. 3

   Check if the ACML requires a software update to resolve overly sensitive error-detection parameters

1. 1

   Verify switch operation

   Test the physical operation of the Constant RPM rocker switch on the armrest to ensure it is not mechanically stuck or damaged.

2. 2

   Inspect wiring and connections

   Check the wiring harness and electrical connections between the CRPM switch and the Armrest Control Module (ACML) for shorts, opens, or crushed wires.

3. 3

   Update ACML software

   Check if the ACML requires a software update. Some ACML error codes are caused by overly sensitive error-detection parameters that can be resolved by updating the ACML software to relax the fault code parameters.