BENDIX GSBC - Page 34

BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual 34
BENDIX GSBC SYSTEM TROUBLESHOOTING CONT.
TEST 2: REVERSE VALIDATION TEST
If a pressure plausibility fault is set incorrectly, a Reverse (Validation) Test can
check system operation and clear faults related to pressure plausibility. A Reverse
(Validation) Test should be performed before scheduling service on a vehicle, or, if
fault codes show any DTCs set to pressure plausibility.
NOTE: The Reverse (Validation) Test will only address faults set by pressure plausibility
faults. It will not correct pneumatic or mechanical faults, or failures in the system.
If the test does not clear a fault, the vehicle should not be driven, and should be
inspected and diagnosed by a qualied technician.
Display Notications for Driver
When the dashboard displays the rst pop-up message, the driver must take
action. The driver cannot run the test unless a pop-up message rst appears.
Pop-Up Message Warning Lamp Status
“Test Not Started Fully Depress Brake
Pedal And Release Parking Brake”
Release the parking brakes on the power unit.
Release the parking brakes on the trailer (if equipped).
Press the service brakes using the brake pedal.
“Test Active Fully Depress Brake Pedal”
Press the brake pedal so that more
than 90 psi is delivered.
Hold pressure steady until directed
to do something else.
“Test Active Release The Brake Pedal” Release the service brakes.
“Test Completed Vehicle Ready To Use”
Test was successfully passed, the fault was cleared,
and the vehicle is ready for use.
“Test Failed Brake Pedal Operation
Incorrect”
The service brake was not operated correctly.
To begin the test again, power cycle the vehicle and
restart the procedure.
NOTE: This does not indicate a failure in the foot
brake module.
“Test Aborted Vehicle Moving”
The test was canceled because vehicle movement
was detected. Make sure the vehicle is parked
on level ground and that the throttle
is not applied during the test.
To begin the test again, power cycle the vehicle and
restart the procedure.
“Test Completed Error Remaining”
The test was conducted successfully, but the detected
fault re-occurred. The vehicle must be serviced by a
qualied technician.
NOTE: These dashboard displays and their operation are for representation purposes only.
Check with the OEM for actual dashboard displays and operation.
IMPORTANT