TEBS E
9
Start-up
167
9.3
Start-up of the LIN ultrasonic sensors
PWM-ultrasonic sensors (TailGUARD
light
) have not been learned.
Reflections cannot be masked out.
Requirements: For start-up of the ultrasonic sensors and TailGUARD system, re-
verse gear must be engaged.
Normal EOL test
Initialisation of the LIN ultrasonic sensors is carried out in three steps as part of the
end-of-line test:
1. Teaching the LIN ultrasonic sensors
2. Reflection test
3. Test body detection
1. Teaching the LIN ultrasonic sensors
The LIN ultrasonic sensors must be learned to detect the position on the vehicle af-
ter installing.
– In the TEBS E Diagnostic Software click on
Measured values, TailGUARD
.
– Go to window
TailGUARD
and click on button
Start initial start-up
.
This requires covering the LIN ultrasonic sensors for 1-2 seconds each, the fol-
lowing sequence must be stricly followed:
Main level: 1-left 2-right 3-middle
Additional level: 4-left 5-right 6-middle
The LIN ultrasonic sensor to be covered flashes.
If a LIN ultrasonic sensor has been detected, the position lamps of the vehi-
cle flash one time and the next LIN ultrasonic sensor that has to be learned
flashes in the image (see window
TailGUARD
).
2. Reflection test
After the LIN ultrasonic sensors are learned, a test is performed to find whether re-
flections occur and the LIN ultrasonic sensors incorrectly detect objects on the ve-
hicle as hindrances.
– For this test, an area of 2.5 m behind the vehicle and 0.5 m to the side of the
vehicle must be kept clear.
– If an object is detected, press the
Mask reflections
button to mask this reflection
out.
Another measurement is then made to determine whether reflections of
other objects have to be masked.
If objects are still detected, LIN ultrasonic sensors or attachment parts must
be positioned differently.
3. Test body detection
If the system is fault-free, an object test is performed.
– This requires a test specimen, e.g. a plastic pipe, which is higher than the instal-
lation height of the LIN ultrasonic sensors, at 0.6 m left (±0.1 m) and 1.6 m right
(±-0.2 m) in the area behind the vehicle.
The detected distance is shown in the TEBS E Diagnostic Software.
– Confirm the position of the objects with button
Object detected
.
If the test specimen is detected properly, the End-of-Line bit in the ELEX is
deleted and the system is fault-free. The start-up was successful.
If the test was not successful, either the LIN ultrasonic sensors are being
learned in the wrong position or the parameters for the sensor distance have
been entered improperly. Check the parameters or the installation position of
the LIN ultrasonic sensors and repeat the test.
