What is the reason for the P0685 fault code causing the car not to start?

1 Answers
LeHaley
07/29/25 7:14am
p>The reasons for the P0685 fault code causing the car not to start are as follows: System scope: This fault belongs to the computer or auxiliary output circuit. Cause: It may be due to poor harness contact, or a malfunction in the generator or relay. Information about relays is as follows: Relay: (relay) is an electrical control device that causes a predetermined step change in the controlled quantity in the electrical output circuit when the change in the input quantity meets the specified requirements. Function: The relay has a control system and a controlled system, and is usually used in automatic control circuits, playing roles such as automatic regulation, safety protection, and circuit conversion in the circuit.
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