The panic button circuit in your vehicle's security system has an open connection, like a broken wire preventing the alarm from receiving the panic signal. The ECU detects no electrical continuity on the panic input line when it should be present.
The ECU monitors the panic button input circuit for a complete electrical path (low resistance). It expects a defined voltage signal when the button is pressed and detects an open circuit condition when resistance exceeds normal thresholds. A persistent open circuit triggers the fault code.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Circuit Continuity | Low resistance path (typically <100 ohms) | Open circuit (infinite resistance or >10k ohms) |
| Input Voltage | 5V or 12V depending on design | No voltage change detected when button pressed |