Description:

This error code, EPC 000974.03, is generated when the control unit measures a voltage in excess of 4.7 volts at the signal input of the hand throttle potentiometer (B96, lead 6018). This indicates a short to a positive lead, an open circuit, or a problem with the ground connection in the potentiometer’s circuit.

Reaction:

When this error is detected, the control system may not accurately interpret the hand throttle position, leading to potential issues with throttle control and engine performance.

Recommendations:

Inspect Wiring and Connections:

• Check the wiring and connections to the hand throttle potentiometer (B96) for any signs of damage, loose connections, or corrosion. Repair or replace as necessary.

Test Potentiometer:

• Use diagnostic tools to test the hand throttle potentiometer (B96) for functionality. Replace the potentiometer if it is found to be defective.

Check for Short Circuits:

• Inspect the circuit for any signs of shorting to a positive lead or an open circuit. Repair any detected faults.

Verify Ground Connection:

• Ensure that the ground connection in the potentiometer’s circuit is secure and free of corrosion.

Reset and Test System:

• After addressing the issues, reset the system and test the hand throttle potentiometer to ensure it is operating correctly and that the error code does not reoccur.

Note:

Regular inspection and maintenance of the potentiometer and its associated wiring are crucial for ensuring accurate throttle control and preventing voltage issues.