John Deere 522149.14 – TIQ, ACU, TII, or TIP: Wheel Speed Limited / Reduced Ground Speed, Fault / Ground Speed Has Been Slowed

This code indicates that the tractor's control system has detected an internal fault or a related component failure (such as a brake pressure sensor or steering system fault) and has forced the machine into a restricted function/limp mode, limiting the maximum ground speed. This code is often a secondary symptom of a different active fault.

• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 8235R
• 8245R
• 8260R
• 8285R
• 8310R
• 8310RT
• 8335R
• 8335RT
• 8360R
• 8360RT
• 8400R
• 9470RT
• 9510RT
• 9520RT
• 9570RT

1. 1

   Check for other active codes (e.g., TSB 003876.15 or TSA 523329.14), as this code is usually a secondary symptom of another fault

2. 2

   Inspect Brake Pressure Sensors and harnesses located on the right-hand or left-hand side between the inside tire and the rear end housing

3. 3

   Check connectors for physical damage or rubbed-through wires at the Left Rear Brake Pressure Sensor (B725) or Right Rear Brake Pressure Sensor (B726)

4. 4

   Check for water intrusion at the implement light connector on the rear of the tractor

1. 1

   Locate brake pressure sensors

   Locate the brake pressure sensors (e.g., B725 Left Rear Brake Pressure Sensor) near the rear end housing.

2. 2

   Inspect wiring harness

   Disconnect the sensor and inspect the wiring harness for rubbed-through wires or a broken connector housing.

3. 3

   Replace damaged wiring components

   If the wiring is damaged, replace the damaged pins, weather seals, and the connector housing.

4. 4

   Replace brake pressure sensor

   If the wiring is intact but the sensor has failed internally, remove and replace the brake pressure sensor.

5. 5

   Reconnect harness

   Reconnect the harness.

6. 6

   Clear codes and restart

   Turn the key on, clear the stored codes from the module, and restart the tractor.

7. 7

   Test drive

   Test drive the tractor to ensure full ground speed is restored and no codes return to an active state upon startup.