Kia Carnival (2009+). Instruction — part 528

(3) If a vehicle stays under extremely hot or cold environment, the detection range may be reduced. It will be

restored at the normal temperature.

(4) When heavy cargo is loaded in rear cargo area, it changes the vehicle balance, which reduces the detection

range.

(5) When other vehicle's horn, motor cycle engine noise, or other ultra-sonic wave sources are near.

(6) Under heavy rain.

(7) When reversing towards a vertical wall and the gap between the vehicle and the wall is 15cm. (Alarm may

sound despite the absence of a barrier)

(8) If radio antenna is installed at the rear.

(9) If the vehicle rear wiring is re-routed or electrical component is added at the rear part.

(10) Vehicle balance is changed due to the replacement of the rear spring.

(11) The unit will operate normally when the vehicle speed is 5km/h or less.

Above this speed, the unit may not operate normally

8. Check the rear bumper for installation condition and deformation. If installed improperly or the sensor orientation is

deviated, it may cause malfunction.

9. Be careful not to apply shock during sensor installation on the transmission or reception unit.

10. When adding electrical devices or modifying harness at the rear body of the vehicle, ensure not to change the

transmission and reception unit wiring.
Tagging the transmission side and reception side, it may cause malfunction.

11. High power radio transmitter (above 10W) may cause malfunction. Do not install it on the vehicle.

12. Be careful that excessive heat or sharp objects shall not touch ultrasonic sensor surface.

Do not cover the sensor opening or press the sensor.

2009 > G 2.7 DOHC >

REPLACEMENT

1. Remove the right side trim of the trunk (Refer to the Body group - "Interior trim")

2. Loosen the mounting bolts and remove the back warning control unit (A) from the quarter panel.

Body Electrical System

Rear Parking Assist System - Parking Assist

Sensor

Body Electrical System

2009 > G 2.7 DOHC >

Operation principle

The sensor emits ultrasonic wave to the objects, and it measures the time until reflected wave returns, and calculates
the distance to the object.

Distance detection type

Direct detection type and indirect detection type are used together for improving effectiveness of the detection.

1. Direct detection type: One sensor transmits and receives signals to measure the distance.

2. Indirect detection type: One sensor transmits signals and the other sensor receives the signals to measure the

distance.

Measurement principle

Back warning system (BWS) is a complementary device for reversing. BWS detects objects behind vehicle and
provides the driver with buzzer alarm finding objects in a certain area, using ultrasonic wave propagation speed and
time.
The propagation speed formula of ultrasonic wave in air is following :
v=331.5 + 0.6t (m/s)
v=ultrasonic wave propagation speed
t=ambient temperature
The basic principle of distance measurement using ultrasonic wave is :

Sensor detection range