Description:

This error code, EPC 001666.03, is generated when the EPC detects that the AutoMode switch is activated during startup. This indicates a short to a supply lead somewhere in the circuit.

Reaction:

When this error is detected, the AutoMode switch may not function correctly, leading to issues with automatic mode activation and overall system performance.

Recommendations:

Inspect Wiring and Connections:

• Check the wiring and connections to the AutoMode switch (S102/S158) for any signs of damage, loose connections, or corrosion. Repair or replace as necessary.

Test AutoMode Switch:

• Use diagnostic tools to test the AutoMode switch for functionality. Replace the switch if it is found to be defective.

Check for Short Circuits:

• Inspect the circuit for any signs of shorting to a supply lead. Repair any detected faults.

Verify Ground Connection:

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

Reset and Test System:

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

Note:

Regular inspection and maintenance of the AutoMode switch and its associated wiring are crucial for ensuring accurate switch operation and preventing voltage issues.