User's Manual

22
FIGURE 19 ‑ WHEEL SPEED SENSOR INSTALLATION
LEAKAGE AND OPERATIONAL TESTS
1. Before performing the leakage tests, block the wheels.
2. Fully charge the air brake system and verify proper
brake adjustment.
3. Makeseveraltrailerbrakeapplicationsandcheckfor
prompt application and release at each wheel.
4. ChecktheTABS-6Advmodule,modulatorvalveand
allairhosettingsforleakageusingasoapsolution.
 ChecktheABSsolenoidbodywiththetrailerservice
brakes fully applied. If leakage is excessive — more
than a single 1" bubble within 1 minute — replace the
TABS‑6 Adv module.
 Check therelay exhaustport withthe trailer service
brakes released to be sure that leakage is less than a
single1"bubblewithin3seconds.Ifexcessiveleakage
is detected at the relay exhaust port, perform the
following test before replacing the TABS‑6 Adv module:
• Apply the trailer spring brakes. Recheck for leakage
around the relay exhaust port. If the exhaust port
stops leaking, this indicates a leak between the
emergency and service sides of the spring brake
chamber. However, if the relay exhaust port
continues to leak excessively, replace the TABS‑6
Adv module.
5. Applypowerand monitorthepower-upsequence to
verify proper system operation. See Section 15.
6. Calibrateandsetodometerparameters,ifnecessary,
using a diagnostic tool. See Section 16.
7. Perform an installation test using a diagnostic tool.
Minimum teststhat arerequired toverify theproper
installation of the ABS/TRSP system are:
• ECU Information: This test provides the user with
specic ECU information.  It is required that no
DTC’s(otherthan“end-of-linetestnotcompleted”)
arepresentandthattheECUhasbeencongured.
• Wheel End Sequence Test:  During this test,
checks are carried out that verify the correlation of
the wheel installed with a Wheel Speed Sensor and
the Pressure Modulator that controls the pressure
to the associated brake.
• Lateral Acceleration Test: The installation angle
informationisretrievedfromtheECUandcompared
tothepredenedlimits(+/-5 degrees).Thistest
veriesthattheunitisinstalledasclosetohorizontal
as possible.
TABS
ADV
TABS
ADV
TABS
ADV
TABS
ADV
0° Orientation
(Top-View)
90° Orientation
(Top-View)
180° Orientation
(Top-View)
270° Orientation
(Top-View)
Left - “Road Side”
Vehicle Driving Direction
Right - “Curb Side”
Sensor
“S-D”
Sensor
“S-C”
Sensor
“S-C”
Sensor
“S-D”
Sensor
“S-C”
Sensor
“S-D”
Sensor
“S-D”
Sensor
“S-C”