Description:

The error code ACU 974.04 is triggered when the voltage in the hand throttle sensor circuit is lower than expected. This low voltage condition could result from a variety of issues, such as poor electrical connections, degraded wiring, or a failing sensor.

Reaction:

Due to this voltage anomaly, the control unit has degraded function to stabilize operation and prevent unsafe equipment behavior.

Recommendations:

• Inspect the hand throttle sensor and its connections for any signs of damage, wear, or loose connections that could result in reduced voltage.
• Measure the voltage levels using a multimeter to verify that they are below normal operational ranges and identify possible points of failure.
• Ensure that all wiring to and from the hand throttle sensor is intact, properly insulated, and free from corrosion.
• Replace the hand throttle sensor if it fails to meet the specified voltage requirements upon testing.
• If the issue persists after these corrective steps, consider consulting with a John Deere certified technician for a more in-depth diagnosis and potential system overhaul.

Note:

Continuous operation with low voltage conditions in critical sensor circuits can compromise precision and safety. It’s crucial to address such issues promptly to ensure optimal machinery performance and operator safety.