Description:

This operator information (diagnostic trouble code), EPC 523677.31, is generated when the declutch switch on the range shift lever has been actuated, but there is no valid signal to indicate that the operator is present (operator on seat, clutch, or brake pedals depressed). A valid signal indicating the operator’s presence must be received at least 3 seconds prior to actuation. This code can also be triggered by operator error (operator not on seat shortly before/during the actuation of the declutch switch).

Reaction:

When this error is detected, the system may alert the operator about the lack of a valid presence signal, potentially preventing the declutch switch from functioning correctly.

Recommendations:

Verify Operator Presence Sensors:

• Check the sensors that detect the operator’s presence (seat sensor, clutch pedal sensor, brake pedal sensor). Ensure they are functioning correctly and transmitting valid signals.

Inspect Wiring and Connections:

• Inspect the wiring and connections to the operator presence sensors and the declutch switch for any signs of damage, loose connections, or corrosion. Repair or replace as necessary.

Test Operator Presence System:

• Use diagnostic tools to test the operator presence system for proper functionality. Ensure that valid signals are received consistently.

Educate Operator:

• Ensure that the operator understands the correct procedure for using the declutch switch and the importance of being in the seat or depressing the clutch/brake pedals before actuation.

Reset and Test System:

• After addressing the issues, reset the system and test the declutch switch to ensure it operates correctly and that the error code does not reoccur.

Note:

Regular inspection and maintenance of the operator presence sensors and their associated wiring are crucial for ensuring reliable operation and preventing operator error-related issues.