PARK ASSIST / MONITORING: INTUITIVE PARKING ASSIST SYSTEM: OPERATION CHECK (2008 Sequoia)

1. CHECK INITIAL CHECK FUNCTION

(a) Check the initial check function for the LED and buzzer.

(1) When the clearance sonar main switch is turned ON, check that the following occurs: 1) after 0.4 seconds, the buzzer sounds for approximately 0.7 to 1.3 seconds, and 2) the system starts the obstacle detection operation.

(b) Check the initial check function for the sensor.

Approximately 0.4 seconds after the ignition switch has been turned to ON and the clearance sonar main switch has been turned ON, all sensors will be checked by the system.
After 1 +/-0.3 seconds have elapsed, the check operation for all of the sensors will stop when a vehicle speed of over 10 km/h (6 mph) is detected.
When the vehicle has been shifted from P, the system will change to obstacle detection operation according to the shift lever position.
If there are no changes in the conditions, such as those listed above (speed or shift lever position), the sensor check operation will be halted after 5 +/-1 second have elapsed. If one or more sensors are anomalous, check operation for all of the sensors will continue (sensors will continue transmitting).

(c) If the sensor is found to have an anomaly due to an open circuit or freezing for approximately 5 seconds or more, indications as shown in the following illustration appear.

(1) When the ECU judges that the sensor needs to be repaired:

(2) When the ECU judges that the sensor needs to be cleaned:

HINT:

When the sensor condition returns to normal, the system ends normal clearance sonar mode and returns to steering sensing mode.
If the clearance sonar main switch is ON and the ignition switch is turned ON, the buzzer does not sound.

(b) Move the shift lever to R to check the front corner sensors, rear corner sensors and back sensors.

NOTICE:

These detection ranges are applicable when positioning the pole parallel or perpendicular to the ground.
The ranges vary depending on the measuring method and type of obstacle (such as walls).
For close-range and medium-range detection, the values shown are for when using a pole with a diameter of 60 mm (2.36 in.). For long-range detection, the values shown are for when using a pole with a diameter of 400 mm (15.7 in.).
The detection range of the resin bumper and steel bumper are not the same, as their installation positions are slightly different.

*1: The No.1 ultrasonic sensor side view detection ranges hatched area represents the cross section of the top view detection range A lines. The hatched area does not represent the entire side view detection range.

(f) When the ultrasonic sensors have detected an obstacle, check the accessory meter and buzzer sounds with the clearance sonar main switch ON.

Operation Condition

Front Corner Detection Range

Rear Corner Detection Range

Back Detection Range

Ultrasonic waves are used to measure the detection range. However, the detection range may vary depending on the ambient temperature.

(2) Check the indicator and buzzer on the accessory meter when the front corner sensors have detected an obstacle.

Operation Condition

Accessory Meter

Ultrasonic waves are used to measure the detection range. However, the detection range may vary depending on the ambient temperature.

(3) Check the accessory meter and buzzer when the front corner sensors, back sensors and rear corner sensors have detected an obstacle.

Operation Condition

Accessory Meter

Ultrasonic waves are used to measure the detection range. However, the detection range may vary depending on the ambient temperature.