Case IH 2241 – ZDC: Engine Speed Variation Impossible (Commanded vs. Actual Engine Speed)

This indicates a closed-loop control failure. The transmission/drivetrain controller is commanding a specific engine RPM to match the load or operator input, but the actual engine speed being reported back by the sensors does not match the commanded value.

• Steiger T4B
• Case IH Steiger CVT
• Case IH Puma CVX / CVT
• Case IH Maxxum CVX / CVT
• Case IH Optum CVX

1. 1

   Check the Engine Speed Sensor for proper voltage and resistance to ensure it is reporting accurate RPMs.

2. 2

   Verify the CAN bus communication lines between the Engine Control Module (ECM) and the ZDC (CVT Controller).

3. 3

   Inspect the wiring harness connecting the engine speed sensor to the ECM for chafing, shorts to ground, or open circuits.

4. 4

   Ensure there are no severe mechanical loads or fuel delivery issues preventing the engine from physically reaching the commanded RPM.

1. 1

   Clear fault codes

   Clear the inactive fault codes to see if 2241 is an active or stored (historical) code.

2. 2

   Replace Engine Speed Sensor

   Replace the Engine Speed Sensor if sensor output voltages are out of specification.

3. 3

   Repair CAN wiring

   Repair any damaged CAN wiring between the ZDC and the engine ECM.

4. 4

   Recalibrate CVT and engine communication

   Recalibrate the CVT and engine communication via the Case IH Electronic Service Tool (EST) if a module is replaced.