John Deere 1807.2 – XSC / XSA, SSU, TSA: Steering Wheel Position Sensor 1 Duty Cycle High

The electronic signal (duty cycle) coming from channel 1 of the steering wheel rotary position sensor is exceeding the normal upper limit. This condition usually points to a malfunctioning sensor, a wiring harness issue (such as a short to power), or a signal processing error.

• 6110M
• 6120M
• 6130M
• 6145M
• 6155M
• 6175M
• 6195M
• 6110R
• 6120R
• 6130R
• 6145R
• 6155R
• 6175R
• 6195R
• 6215R
• 6145J
• 6165J
• 6180J
• 6205J
• 8230
• 8235R
• 8245R
• 8260R
• 8285R
• 8295R
• 8310R
• 8320R
• 8335R
• 8360R
• 8400R
• 8320RT
• 8345RT
• 9470RT
• 9520RT
• 9570RT
• 8100T
• 8200T
• 9300T
• 7180
• 7280
• 7380
• 7480
• 7580
• 7780
• 7980
• CH570
• CH670
• 9470 STS
• 9570 STS
• 9670 STS
• 9770 STS

1. 1

   Visually inspect the steering wheel position sensor (B69) for any signs of physical damage or wear.

2. 2

   Inspect the wiring harness and pins for corrosion, moisture, or chafing that could cause a short circuit resulting in a high duty cycle.

3. 3

   Ensure the sensor is properly installed and securely connected.

4. 4

   Use a diagnostic tool (like John Deere Service ADVISOR) to monitor the duty cycle of the sensor in real-time to verify if it consistently reads above the normal operating range.

5. 5

   Check for and install any available updates for the steering control software to address potential bugs or signal processing issues.

1. 1

   Preparation

   Park the machine on a level surface, lower any attachments to the ground, stop the engine, and remove the key. Allow the machine to cool and ensure the electrical system is powered down.

2. 2

   Locate the Sensor

   Access the steering column where the rotary steering wheel position sensor is mounted.

3. 3

   Disconnect

   Carefully unplug the electrical connector from the sensor.

4. 4

   Removal

   Remove the mounting hardware securing the sensor to the steering column and slide the old sensor off the shaft.

5. 5

   Installation

   Install the new steering wheel position sensor in the correct orientation and secure it with the mounting hardware.

6. 6

   Reconnect

   Plug the electrical harness back into the new sensor, ensuring the connector clicks securely into place.

7. 7

   Calibration and Testing

   Connect a diagnostic tool to clear the 001807.20 fault code. You may need to perform a steering sensor calibration procedure via the diagnostic tool or the in-cab display so the module learns the new sensor's center position. Test the steering system for proper operation.