35 BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual
BENDIX GSBC SYSTEM TROUBLESHOOTING CONT.
TEST 2: REVERSE VALIDATION TEST CONT.
Test Frequency
The Reverse (Validation) Test can be performed by a driver but will not run
automatically. The system will automatically prompt the driver to conduct the test if
there is a pressure plausibility fault active and the test preconditions have been met.
NOTE: If the preconditions are no longer met (for example if the vehicle begins to
move), the test will immediately exit and restore full electronic control. If the test
exits prematurely, it will not clear any faults.
Test Preconditions
For the Reverse (Validation) Test to run, the following preconditions must be met
on the vehicle.
1. The vehicle has an active pressure plausibility fault.
2. The vehicle ignition is on.
3. The air system is fully charged and must remain above 102 psi for the
duration of the test.
4. The vehicle is stationary and on level ground.
5. The vehicle is not in roller test bench mode, or on a roller test bench.
6. Auto-Hold mode must be disabled using the dash switch.
Test Procedure
This test requires the operator to unpark the vehicle and for the service brakes to be
cycled in a specic sequence. If the vehicle moves or rolls during the test, the test
will fail. To ensure that the vehicle remains stationary and that the test is completed
correctly, chocking the wheels before the test will help ensure that the test can run
successfully.
NOTE: To correct a test failure due to motion of the vehicle, refer to Reverse (Validation)
Test Procedure Step 11.B on page 37.
Failure to chock the wheels could result in a potential collision, property
damage, serious injuries, or death.
It is the operator’s responsibility to prevent unintended vehicle movement. If
the vehicle begins to move during the test, apply the service and/or parking
brakes as necessary, regardless of test status. Once the vehicle is safely
stopped, refer to Reverse (Validation) Test Procedure Step 11.B on page 37 on
how to restart the test procedure.
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