Case IH 56003 – Transmission Controller (TRANS): Controller Memory Error -- Loss of Forward Gear Pre-selection information.

This code indicates that the forward start-up gear configuration is missing or corrupted in the controller's memory. The failure mode occurs either because the forward gear pre-select was never configured in the controller, or the stored configuration has become corrupt.

• STX Steiger
• Case IH Puma series
• Case IH Steiger series
• Case IH MX Magnum series
• Case IH 7220

1. 1

   Verify Voltage: Check for low battery voltage codes (such as TRANS 56022 - Battery voltage lower than 9 volts), as voltage drops can cause the controller to lose memory.

2. 2

   Inspect Connections: Inspect the transmission controller and wiring harness for damage, corrosion, or loose connections that could interrupt power to the module's memory.

3. 3

   Check Configuration: Use the service tool configuration screen to verify if the stored Forward Gear Limit is invalid or blank.

1. 1

   Connect the Case IH service tool / instrumentation to the tractor's diagnostic port.

2. 2

   Turn the key on and access the Trans Setup Menu.

3. 3

   Retrieve, record, and clear any active fault codes (faults must be cleared before calibration is possible).

4. 4

   Navigate to the Configuration screen and input/program the correct forward start-up gear pre-selection.

5. 5

   Perform a full Transmission Controller Calibration.

   Note: The transmission controller must be calibrated whenever the controller loses memory or is replaced.

6. 6

   Save the configuration and exit the select controller screen.

7. 7

   Restart the tractor and verify that the fault code does not return and that the tractor shifts into the pre-selected forward gear normally.