John Deere 525.07 – TIQ: Wheel Speed Sensor Fault

The control software has detected that the error rate of the received CAN Bus data points from the wheel speed sensor is too high. Because the controller cannot verify the true speed of the wheels, the transmission software restricts the number of gears that can be shifted (often resulting in an "Undefined Gear" or "Limited gear selection" state) to prevent damage and ensure safe operation.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6M Series
• 6105M
• 6115M
• 6125M
• 6140M
• 6150M
• 6170M
• 6R Series
• 6150R
• 6210R
• 7R Series
• 7210R
• 7230R
• 7250R
• 6090MC/RC
• 6100MC/RC
• 6110MC/RC
• 770G
• 770GP
• 772G
• 772GP
• 210LJ Landscape Loaders
• 7000 Series
• 8000 Series
• 7810
• 8400
• 5E Series
• 8R Series
• CP690
• CS690
• 6B Series
• 6D Series
• 6100D
• 8320R

1. 1

   Cycle the power by turning the key switch off, waiting a few moments, and cycling the power back on to reset the module

2. 2

   Visually inspect the wheel speed sensor for physical damage, heavy debris buildup, or misalignment

3. 3

   Inspect the wiring harness leading from the wheel speed sensor to the TIQ module for chafed wires, shorts to ground, or open circuits

4. 4

   Check the CAN Bus connections (including implement/attachment connections) for corrosion or loose pins

1. 1

   Safely Park the Machine

   Bring the machine to a stop, place the shift lever in the "Park" position, and turn off the engine.

2. 2

   Locate the Sensor

   Locate the wheel speed sensor on the transmission housing or axle (location varies by specific model).

3. 3

   Disconnect and Clean

   Disconnect the sensor's electrical harness. Clean the connector pins with electrical contact cleaner and apply dielectric grease.

4. 4

   Test Continuity

   Use a multimeter to test the continuity of the wiring harness between the sensor connector and the TIQ module. Repair any broken wires.

5. 5

   Replace the Sensor

   If the wiring and CAN Bus network are intact but the fault persists after a power cycle, the sensor itself has failed internally. Unbolt the faulty wheel speed sensor, install the replacement, and torque to OEM specifications.

6. 6

   Clear Codes and Test

   Turn the key switch on, clear the diagnostic trouble codes via the CommandCenter display or a diagnostic tool (like Service Advisor), and test drive the machine to ensure full gear selection is restored.