What are the reasons for the Honda XRV not starting and the dashboard flashing?

[PresleyMarie]

There are generally two common reasons for this situation: 1. Insufficient battery power: Modern car engines are electronically controlled fuel injection systems, operated by the engine control unit (ECU), which itself consumes power. When the key is turned, the main relay engages to supply power to the ECU, which then begins operation. 2. Poor electrical connection: The principle is similar to the above. The starter motor requires a large instantaneous current, and areas with poor connections may break the circuit when subjected to high current, causing the relay to disengage. When the key is released, the current decreases, and the poor connection may restore power. A common issue is severe corrosion at the battery terminals, leading to insufficient effective contact area at the connections. This can usually be resolved by removing and cleaning the terminals.