Description:

Error code ECU 000676.03 is triggered when the ECU detects an output signal from the glow plug relay when it has not energized the relay supply. This indicates an unexpected high voltage in the glow plug relay circuit, which may be due to a wiring issue, a malfunctioning relay, or an unintended electrical path.

Reaction:

The ECU may limit or disable the starting aid function to prevent potential damage due to the unexpected voltage.

Recommendations:

• Inspect Relay and Wiring: Check the glow plug relay and its associated wiring for signs of damage, corrosion, or loose connections that could cause unintended voltage.
• Test Relay Functionality: Verify that the relay is functioning correctly and is not stuck in the closed position or shorted internally.
• Check for Electrical Path Issues: Ensure there are no unintended electrical paths causing the relay to receive voltage when it should not.
• Replace Faulty Components: If the relay or any wiring is found to be defective, replace the necessary components to restore proper operation.
• Reset ECU and Verify Operation: After repairs, reset the ECU to clear the error code and test the starting aid system to ensure the relay operates only when intended.

Note:

Proper functioning of the glow plug relay is crucial for ensuring efficient engine start-up, especially in cold conditions. Regular inspection and timely repairs can help prevent starting issues.