LITE-CHECK INSPECTOR 920
Page: 23 of 36
lower, it may indicate wire corrosion. New trailers must provide the correct voltage to
their antilock braking system (ABS) electronic control unit (ECU) through both the stop
lamp circuit and the continuous power circuit. The specified value of 9.5 volts for
minimum voltage includes a safety margin of 1.0 volt.”
1. Connect the tester to the trailer with the 7-Way vehicle cable
2. Press “
SELECT
” button (this will allow the tester test multiple add loads)
3. Record tester voltage and amperage (00.00 at this step)
4. Press the following buttons in order
a. “MARKER”
b. “LEFT”
c. “TAIL”
d. “RIGHT”
e. “BRAKE”
f. “AUXIL”
5. Record tester voltage and amperage
6. Press “
SELECT
” button to cancel the test
ABS Operation
Warning:
If the trailer being tested has multiple ECUs,
before beginning the ABS test procedure, disconnect all
but one ECU. Run the ABS test procedure using the
steps below. When completed, disconnect the first ECU
and reconnect the next one. Now repeat the test
procedure with the next ECU.
NOTE
: All ABS notes are for the Meritor Wabco Easy
Stop other ECUs may vary
The INSPECTOR 920 automatically checks the brake
and auxiliary circuits.
Press the yellow
ABS
button on either the
keyboard or remote. The tester will display the brake
and auxiliary circuits’ status for a few moments.
NOTE
: If the brake circuit test fails, the operator will be
given the option of continuing or exiting the test. If the
auxiliary circuit test fails the display will indicate an error
