2012 Lexus HS 250h Owners Manual - Page 249

249

2-4. Using other driving systems

2

■

Situations in which the pre-collision system does not function properly

The system may not function effectively in situations such as the following:

●

On roads with sharp bends or uneven surfaces

●

On slippery roads such as those covered with ice or snow

●

If a vehicle suddenly moves in front of your vehicle, such as at an intersection

●

If a vehicle suddenly cuts in front of your vehicle, such as when overtaking

●

In inclement weather such as heavy rain, fog, snow or sand storms

●

When your vehicle is skidding with the VSC system off

●

When the radar sensor is out of alignment (

→

P. 252)

■

Automatic cancellation of the pre-collision system

When a malfunction occurs due to sensor contamination, etc. that results in the

sensors being unable to detect obstacles, the pre-collision system will be automati-

cally disabled. In this case, the system will not activate even if there is a collision pos-

sibility.

■

Obstacles not detected

The sensor cannot detect plastic obstacles such as traffic cones. There may also be

occasions when the sensor cannot detect pedestrians, animals, bicycles, motorcy-

cles, trees, or snowdrifts.

■

If the PCS warning light turns on or flashes

●

If the PCS warning light begins flashing and “CHECK PCS SYSTEM” appears

on the multi-information display, this indicates a malfunction in the pre-collision

system. (

→

P. 513)

●

If the PCS warning light turns on and “PCS TEMPORARILY NOT

AVAILABLE” appears on the multi-information display, this indicates that the

grille or radar sensor is dirty. (

→

P. 516)