Toyota Sienna 2010-2021 Owners Manual: The Rear Cross Traffic Alert function detection areas

The areas that vehicles can be detected in are outlined below.

To give the driver a more consistent time to react, the buzzer can alert for faster vehicles from farther away.

Example:

The Rear Cross Traffic Alert function is operational when

• The BSM main switch is set to on.
• The shift lever is in R.
• Vehicle speed is less than approximately 5 mph (8 km/h).
• Approaching vehicle speed is between approximately 5 mph (8 km/h) and 18 mph (28 km/h).

Conditions under which the Rear Cross Traffic Alert function will not detect a vehicle

The Rear Cross Traffic Alert function is not designed to detect the following types of vehicles and/or objects.

• Small motorcycles, bicycles, pedestrians etc.*
• Vehicles approaching from directly behind
• Guardrails, walls, signs, parked vehicles and similar stationary objects*
• Vehicles moving away from your vehicle
• Vehicles approaching from the parking spaces next to your vehicle*
• Vehicles backing up in the parking space next to your vehicle
• Vehicles passing quickly through the detection area

*: Depending on conditions, detection of a vehicle and/or object may occur.

Conditions under which the Rear Cross Traffic Alert function may not function correctly

The Rear Cross Traffic Alert function may not detect vehicles correctly in the following conditions:

• When ice or mud etc. is attached to the rear bumper
• During bad weather such as heavy rain, fog, snow etc.
• When multiple vehicles approach continuously
• Shallow angle parking
• When a vehicle is approaching at high speed
• When parking on a steep incline, such as hills, a dip in the road etc.
• Directly after the BSM main switch is set to on
• When towing a trailer
• Vehicles that the sensors cannot detect because of obstacles