John Deere 000708.18 – SSU: Steering Wheel Position Sensor 1 Signal Problem

The Steering System Control Unit (SSU) has identified a problem with the electrical signal from the cab's steering wheel position sensor 1. This sensor detects the steering wheel's angle and rate of movement. An issue with this signal can disrupt the proper operation of the steering system, particularly affecting automated steering functions like AutoTrac.

• 8R Series Tractors
• 8RT Series Tractors
• 9R Series Tractors
• 9RT Series Tractors
• 9RX Series Tractors
• 9030 Series Tractors
• 9330
• 9430
• 9530
• 9630
• Various other tractors and self-propelled machinery equipped with AutoTrac and SSU-based steering systems

1. 1

   Verify the fault code using a diagnostic scanner to confirm 000708.18 is active or stored

2. 2

   Check for other SSU or CAN bus communication fault codes (e.g., sensor supply voltage codes) which may point to a broader power supply problem rather than a faulty sensor

3. 3

   Visually inspect the wiring harness and connectors leading to the steering wheel position sensor for signs of damage, corrosion, or loose connections

4. 4

   Wiggle the wiring harness while observing sensor readings on a diagnostic tool to identify intermittent connection issues

5. 5

   Perform a mechanical inspection of the steering column components to check for excessive play or mechanical problems

1. 1

   Contact certified dealer

   Official documentation does not provide a specific step-by-step repair guide for the general public. It is recommended to contact a certified John Deere service provider for diagnosis and repair.