Subaru Crosstrek manuals

Subaru Crosstrek Service Manual: Caution

Blind Spot Detection/Rear Cross Traffic Alert (DIAGNOSTICS) > General Description

CAUTION

1. BSD/RCTA

(1) In some cases, BSD/RCTA may not work correctly under the following conditions.

In bad weather such as heavy rain, fog, snow, sand storm, etc.

When ice, snow, dirt, etc. cover the rear bumper.

When the rear bumper has scratches or deformation in the area of the radar sensor.

When a difference of vehicle speeds between your own vehicle and another vehicle within the detection range is too large.

When there is another vehicle remaining within the detection range while your own vehicle starts from stationary state.

While driving on a steep slope with a series of uphills and downhills.

While driving on a wet road with such as puddles.

When more than one vehicle is approaching one after another with a short distance.

When vehicle speed of your own vehicle is almost the same as that of the vehicle within the detection range.

When a difference of the vehicle heights between your own vehicle and another vehicle in the next lane is too large.

Immediately after operating the BSD/RCTA OFF switch.

On wide lanes, when another vehicle of the next lane drives along the opposite edge so the distance is too large for the detection.

(2) BSD/RCTA does not detect the following type of vehicles as well as objects other than vehicles.

Oncoming vehicle

Small motorcycle, bike, pedestrian, etc. *

Vehicle following behind on the same lane *

Stationary objects such as guardrail, wall, sign and parked vehicle*

Another vehicle driving on two lanes away*

NOTE:

*: Detection may be successful depending on circumstances.

(3) BSD/RCTA may perform unnecessary detection in the following conditions.

When guardrails or walls are close enough to be within the detection range.

When distance from the vehicle behind is short.

On narrow lanes, when another vehicle driving on two lanes away enters the detection range.

(4) Radar sensors of BSD/RCTA are each located on LH and RH sides. Always observe the followings for proper operation of the system.

Always clean the vicinity of radar sensors.

Do not give a strong impact to the radar sensor areas. Displacement of the radar sensors may result in improper operation of the system such that it may not detect the vehicle entering the detection range.

Do not disassemble the radar sensors.

Do not scratch or deform the bumper areas with the radar sensors.

NOTE:

Replace the rear bumper in the following cases.

When there is any collision trace or dent inside the radar projection area.

When there is any scuffed (chipped off) section inside the radar projection area on the resin bumper.

When there is any crack inside the radar projection area.

NOTE:

Radar projection area

(a)

70 mm (2.8 in)

(b)

Vertical line

(c)

Radar projection area

For other flaws, perform the sensor readjustment. If no problem is found, replacement is unnecessary.

Do not put a sticker, etc. on/around the radar sensors.

Do not retrofit the radar sensors or the bumper close to the radar sensors.

Do not repaint the radar sensors or the bumper close to the radar sensors.

NOTE:

If there is any painting defect inside the radar projection area, replace the rear bumper without trying to repair it.

Do not give a strong impact, force or drop-off to the radar sensors because they are precision devices.

Do not reuse the radar sensors that were affected by strong impact, force, or fell off.

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