33 BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual
BENDIX GSBC SYSTEM TROUBLESHOOTING CONT.
TEST 1: TEMPORARY BACKUP MODE TEST CONT.
Test Procedure (cont.)
C. The test failed because an issue with the braking system was detected.
• There will be a message on the dashboard that says “Truck Brake
Malfunction.”
• A red EBS Warning lamp will be set (if the EPM fails).
• A yellow EBS Warning lamp will be set (if the eTPCM fails).
• A DTC will be set.
Test Procedure (Pass/Fail Criteria)
Passage of Test: If the test passes, the vehicle can be driven as normal. The system
will continue to attempt to conduct the Temporary Backup Mode test with every
key cycle, but if preconditions are not met, the reminder to conduct the test will
reappear on the dashboard after 150 days.
Failure of Test: If the test fails for the eTPCM, a yellow EBS warning lamp will be
illuminated on the dashboard. If the test fails for an EPM, a red warning lamp will be
illuminated on the dashboard. Both of these faults will be a persistent fault between
key and power cycles, and require service to be corrected. Refer to the GSBC Dash
Display Indicator Lamps and Operation - Faulted section on page 15 for more information
about warning lamps.
If the fault was set in error, a Reverse (Validation) Test can either conrm the fault or
clear it (see Test 2: Reverse Validation Test section on page 34).
If the Reverse (Validation) Test conrms the error, the vehicle must be immediately
serviced by a qualied technician. Failure of the Temporary Backup Mode Test
indicates a signicant problem with the brake system, and the vehicle must not be
operated until the problem is diagnosed and corrected.
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