John Deere 84.07 – PTR, PTP, PTQ, or EPC: Main Control Module Has Noted A Wheel Speed During A Transmission Calibration

The transmission control unit detected a wheel speed signal while a transmission calibration procedure was being performed. Transmission calibrations must be conducted with the machine completely stationary. The presence of a wheel speed signal aborts the calibration process and logs this fault. The underlying condition is either actual physical movement of the tractor, a faulty wheel speed sensor mimicking movement, or a CAN BUS communication error.

• 5085E
• 5090E
• 5090EL
• 5100E
• 5045E
• 5055E
• 5065E
• 5075E
• 5065M
• 5075M
• 5085M
• 5100M
• 5100MH
• 5100ML
• 5115ML
• 5095M
• 5095MH
• 5105M
• 5015ML
• 5090M
• 5115M
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 8310RT
• 8335RT
• 8360RT

1. 1

   Verify the tractor is completely stopped on level ground and is not rolling or vibrating excessively

2. 2

   Inspect the transmission wheel speed sensor (B09/B35) for physical damage, debris buildup on the magnetic pickup, or loose connections

3. 3

   Check the wiring harness between the wheel speed sensor and the PTR/PTQ module for chafing, shorts, or corrosion that could cause a false speed signal

1. 1

   Bring the tractor to a complete stop on a flat, level surface.

   Ensure the tractor is completely stopped on level ground.

2. 2

   Apply the parking brake securely to ensure absolutely no vehicle motion.

   This prevents any accidental movement during calibration.

3. 3

   Restart the transmission calibration procedure via the dash or diagnostic tool.

   Attempt the calibration again while ensuring the vehicle is stationary.

4. 4

   If the calibration completes successfully, the code was simply triggered by accidental movement and can be cleared.

   Clear the code if no further issues arise.

5. 5

   If the code returns immediately while the tractor is stationary, the wheel speed sensor is likely sending a false signal (or the CAN BUS message is incorrect).

   Proceed to test the sensor if the code persists.

6. 6

   Disconnect the wheel speed sensor and test its resistance/voltage output according to the technical manual.

   Check the sensor's electrical properties to verify its functionality.

7. 7

   If the sensor fails the test or the wiring is compromised, replace the wheel speed sensor and re-attempt calibration. If the code persists, contact a John Deere dealer to verify CAN BUS communication between the BCU and the transmission controller.

   Replace defective parts and seek dealer assistance if CAN BUS communication issues are suspected.