sensor KIA CARNIVAL 2007 Workshop Manual

2007 > 2.7L V6 GASOLINE >
INSPECTION
While operating the auto light switch, check if the operations are normal as shown in the timing chart.
1. Auto light sensor value is always read at IGN ON.
2. Light is turned ON after 1sec±0.1sec when auto light sensor value is same as light ON input value.
3. Light is turned OFF after 2sec±0.2sec when sensor value is same as light OFF input value.
4. Tail lamp and head lamp are turned ON when sensor value is same as tail lamp ON input value.
5. Light ON value of sensor is based on the below table.
6. Head lamp signal is output when head lamp switch is ON. After head lamp is turned OFF, head lamp signal output
is immediately stopped if head lamp OFF luminance condition is met at auto light switch ON.
TAIL LAMP, AV LAMP HEAD LAMP
(low beam)
ON 1.77V+/ - 0.08V 0.63V+/ - 0.06V
OFF 3.47V+/ - 0.10V 1.02V+/ - 0.06V
T1 : 2 ± 0.2 sec
T2 : 2 ± 0.2 sec.
REPLACEMENT
Photo & auto light sensor inspection
1. Disconnect the crash pad (Refer to Body group - Crash pad).
2. Remove the Photo & auto light sensor (B) from crash pad.
3.Installation is the reverse of removal.

2007 > 2.7L V6 GASOLINE >
DESCRIPTION
When reversing, the driver is not easy to find objects in the blind spots and to determine the distance from the object.
In order to provide the driver safety and convenience, back warning system will operate upon shifting to "R" Ultrasonic
sensor will emit ultrasonic wave rearward and detect the reflected wave. Control unit will calculate distance to the
object using the sensor signal input and output buzzer alarm in three steps (first, second and third alarm).
ALARM RANGE
Upon detecting an object at each range out of 3 ranges as stated below within the operation range, it will generate
alarm.
First alarm : Object comes near to the sensor located at the rear of vehicle, within 81- 120cm ± 15cm
Second alarm : Object comes near to the sensor located at the rear of vehicle, within 41- 80cm ± 10cm
Third alarm : Object comes near to the sensor located at the rear of vehicle, within 40cm ± 10cm
a.Time tolerance of the above waveform : Time ± 10%
b. At nearer distance than 40cm, detection may not occur.
c. Alarm will be generated with vehicle reversing speed 10km/h or less.
For moving target, maximum operation speed shall be target approach speed of 10km/h.
d. When the vehicle or the target is moving, sequential alarm generation or effective alarm may be failed.
e. False alarm, or failure of the alarm to trigger may occur in the following conditions.
a. Irregular road surface, gravel road, reversing toward grass.
b. Horn, motor cycle engine noise, large vehicle air brake, or other object generating ultrasonic wave is near.
c. When a wireless transmitter is used near to the sensor.
d. Dirt on the sensor.
e. Sequential alarm may not occur due to the reversing speed or the target shape.

2007 > 2.7L V6 GASOLINE >
DIAGNOSIS
1.DIAGNOSIS
Turn the ignition switch ON, then shift the transaxle lever to 'R'. The Back Warning System is then checked.
If no trouble, it generates buzzer alarm sound for 0.3 seconds after 0.5 seconds from power approval. In case of
system failure, buzzer alarm is generated 3 times continuously with the interval of 0.3 seconds.
2.DIAGNOSIS MODE
Switch on diagnosis mode upon system failure.
In case of system failure, then it indicates the failed point as follows.
SENSOR CONNECTION CHECKING

Transmit ultrasonic wave to the sensors, boost input signal, and detect wave.
Waveform will be found, oscillating for a certain period of time.1. Waveform for a normal sensor connection
2.Waveform for a failed sensor connection
Sensor connection will be checked for oscillating period of input signal 3V. If oscillating period is more than
0.8ms, it is normal.
a. Left sensor failure : beep- beep- beep
b. Right sensor failure : beep beep- beep beep- beep beep
c. Rear - right sensor failure : beep beep beep- beep beep beep- beep beep beep
d. Right side sensor failure : beep beep beep beep- beep beep beep beep- beep beep beep beep
WARNING
1.Range detected by back sensors is limited.
Watch back before reversing
2. There is a blind spot below the bumper. Low objects (for example boundary barrier) may be detected from minimum
1.5m away unable to detect at nearer.
3. Besides there are some materials unable to be detected even in detection range as follows.
(1) Needles, ropes, rods, or other thin objects.

(2)Cotton, snow and other material absorbing ultrasonic wave
(for example, fire extinguisher device covered with snow)
4.Reversing toward the sloped walls.
5.Reversing toward the sloped terrain.
6.False alarm may operate in the following condition: irregular road surface, gravel road, sloped road and grass.
Upon alarm generation by grass the alarm may be generated by rock behind grass. Always visually check the area
behind the vehicle before backing up.
The sensors cannot discriminate between materials.
7. Sensors may not operate correctly in the below conditions.
Ensure sensors are clean from mud or dirt
(1) When spraying the bumper, the sensor opening is covered with something in order not to be contaminated. If
sensor opening is contaminated with mud, snow, or dirt, detection range will be reduced and alarm may not be
generated under the crash condition. Dirt accumulated on the sensor opening shall be removed with water.
Do not wipe or scrape sensor with a rod or a hard object.
(2) If the sensor is frozen, alarm may not operate until sensor thaws.

(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.

Parking Assist Sensor

2007 > 2.7L V6 GASOLINE >
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

a.14cm (Diameter) plastic rod is used for the test target.
b. The test result may differ by a different target object.
c. Detection range may be reduced by dirt accumulated on sensor, and extremely hot or cold weather.
d. The following object may not be detected.
a. Sharp object or thin object like rope.
b. Cotton, sponge, snow or other materials absorbing sonic wave.
c. Smaller objects than 14cm (Diameter), 1m length.

2007 > 2.7L V6 GASOLINE >
REPLACEMENT
1.Remove the rear bumper ( Refer to the Body group - "Rear bumper")
2. Disconnect the sensor connector at the inside of the rear bumper (C), and then remove the sensor (B) from the
housing (A).
3.Installation is the reverse of removal procedure.