John Deere ITC522394.13 – ITC: TCM Calibration Mismatch

The system has detected that the StarFire receiver's Terrain Compensation Module (TCM) requires calibration for the machine it is currently installed on. This typically occurs when a receiver is moved from one machine to another or has been reinstalled on the same machine. The TCM corrects GPS position based on vehicle roll, pitch, and yaw. Without proper calibration, GPS data will not accurately reflect the machine's position on varying terrain, leading to guidance and mapping inaccuracies such as skips or overlaps.

• Tractors
• Combines
• Sprayers
• Planters

1. 1

   Ensure the machine is parked on a hard, flat, and level surface

2. 2

   Verify tire pressures are correct and even on both sides of the machine

3. 3

   Ensure the machine is appropriately ballasted so it sits level with respect to the ground

4. 4

   Allow the receiver to warm up for 10-15 minutes, especially in cold weather

5. 5

   Verify that the receiver is securely mounted and oriented correctly (straight forward or backward)

6. 6

   Ensure the receiver has a good SF1 signal or better before starting calibration

1. 1

   Access Standard Calibration

   Navigate to the StarFire menu on the John Deere display. Go to the 'SETUP' tab and press the 'TCM Calibrate' button.

2. 2

   Record First Position

   With the vehicle parked on a hard, level surface and completely still, press the 'Enter' or 'Continue' button. Wait for the status bar to advance to 100%.

3. 3

   Record Second Position

   Turn the vehicle 180 degrees and park it in the exact same spot, facing the opposite direction. For floating front axles, align the rear wheels; for fixed-axle or tracked vehicles, align all wheels/tracks. Once stationary, press 'Enter' or 'Continue' to complete the calibration.

4. 4

   Perform Advanced Calibration (Alternative)

   For higher accuracy (recommended for AutoPath), select the 'Advanced TCM Calibration' icon. Press the calibration button to start (the system requires at least 330 feet of open space). With AutoTrac disabled, position the tractor, set point A, enter the heading, and enable AutoTrac. Drive the AB line at under 4 mph. At 50% completion (point B), turn around and drive back along the same line from B to A at a consistent speed under 4 mph. Once you reach point A, the display will indicate if the calibration was successful.

5. 5

   Replace Receiver

   If the calibration fails repeatedly or other diagnostic codes are present, the StarFire receiver may have an internal fault and require replacement.