Comments On Trouble Symptom

WARNING: This page is about a different car, the 2014 Mitsubishi Outlander. However, it is still accessible from the selected car via links, so may be relevant.

A failure may have occurred in the calibration of the G & yaw rate sensor.
Some drivers mistake a brake dragging for HSA operation.
If the suspension is modified, the vehicle posture changes, and the ASC-ECU judges that the vehicle is on a steep slope and may activate HSA.