BENDIX GSBC Operator's Manual

Global scalable brake control system

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BENDIX

GSBC

(GLOBAL SCALABLE

BRAKE CONTROL) SYSTEM

OPERATOR'S MANUAL

This booklet contains important operational and safety information.

Table of Contents

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Summary of Contents for BENDIX GSBC

Page 1 BENDIX GSBC (GLOBAL SCALABLE ® ® BRAKE CONTROL) SYSTEM OPERATOR’S MANUAL This booklet contains important operational and safety information.
Page 2 This page intentionally left blank.
Page 3: Table Of Contents
NOTE: All of these alerts and actions are part of the GSBC system’s feature set released by Bendix. It is possible for this Operator’s Manual to be moved from vehicle to vehicle. Always verify the features that are included on your vehicles with your dealer or OEM.
Page 4 Improper use of the GSBC system can result in a potential collision causing property damage, serious injuries, or death Be sure to read, understand,...
Page 5: Important Safety Information
Bendix brake control systems are no substitute for prudent, careful driving. Bendix ESP is designed and optimized for trucks and for tractors that tow single trailers. If a tractor equipped with Bendix ESP is used to power multiple trailer combinations (known as “doubles”...
Page 6: System Limitations
SYSTEM LIMITATIONS All systems have limitations, including the Bendix® GSBC® system. It is always the responsibility of the driver to operate the vehicle safely. There may be situations where the GSBC system unexpectedly issues warnings, applies brakes, or does not respond in a manner consistent with your expectations.
Page 7: Vehicle Inspection & Pre-Trip Inspection
ECU must be updated to reflect these changes. Contact your OE vehicle manufacturer prior to making any modifications to your vehicle. If you modify your vehicle and do not update the GSBC ECU, the GSBC system may fail to function as intended Serious vehicle braking and performance...
Page 8: Components
PRE-TRIP INSPECTION INFORMATION The Bendix® GSBC® system is an Electronic Braking System (EBS) which differs from previous generation Bendix brake systems. This results in some changes to your pre-trip inspection process: Indicator Lamps: There is an additional lamp on the dashboard as compared to previous systems.
Page 9: System Operation
NOTE: In the event of a serious system malfunction, the GSBC ECU may be unable to maintain electronic control of the system. In the event of this unlikely occurrence, the system will revert to Pneumatic Backup Mode.
Page 10: System Display & Behavior At Startup
POWER ON SELF TEST (POST) SEQUENCE/CHUFF TEST When GSBC is first powered on with the ignition key, the system will conduct a Power On Self Test (POST). This is a brief self-check that the system performs to check for basic operation of the system, components, internal software and communications functions.
Page 11 NOTE: Refer to the GSBC Dash Display Indicator Lamps and Operation section starting on page 14 for more information about each lamp. ELECTRONIC BRAKING SYSTEM (EBS) BRAKE INDICATOR LAMP (NEW) A red EBS brake critical malfunction indicator lamp is located in the vehicle display.
Page 12 BENDIX GSBC DISPLAY & BEHAVIOR AT STARTUP (CONT ) NOTE: Refer to the GSBC Dash Display Indicator Lamps and Operation section starting on page 14 for more information about each lamp. TRAILER ABS INDICATOR LAMP The yellow trailer ABS indicator lamp is typically located in the vehicle display of tractors or other towing vehicles.
Page 13 BENDIX GSBC DISPLAY & BEHAVIOR AT STARTUP (CONT ) NOTE: Refer to the GSBC Dash Display Indicator Lamps and Operation section starting on page 14 for more information about each lamp. AUTOMATIC TRACTION CONTROL (ATC) STATUS/INDICATOR LAMP If the vehicle is equipped with the Automatic Traction Control (ATC) feature, an indicator lamp may be located in the vehicle display.
Page 14: Dash Display Indicators And Operation
NOTE: These dash indicator lamps and their operation are for representation purposes only. The OEM may have additional dash indicators for ATC and ABS activation. Check with the OEM for actual display indications and operation. BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual...
Page 15 If instructed to do so, the driver will need to perform Pressure Plausibility Tests (refer to Troubleshooting - Pressure Plausibility Tests section on page 28) These tests may clear faults related to pressure plausibility BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual...
Page 16: Gsbc System Features
Refer to the Towed Vehicles without ABS section on page 18 for more information If the Bendix® ABS feature has faulted which is indicated by the applicable warning lamp on the dash (see Dash Indicator Lamp - Faulted section on...
Page 17 • The Bendix ABS system is not a substitute for safe driving. Even with the Bendix ABS system, you must remain alert, react appropriately and in a timely manner, and drive defensively. Do not take unnecessary risks.
Page 18 This feature is active only at low vehicle speeds. If ATC is active and all of the drive wheels begin to spin, the Bendix ATC system may reduce engine throttle to improve traction at all of the drive wheels.
Page 19 Bendix® Electronic Stability Program (ESP®) is a feature offered by GSBC vehicles that reduces the risk of rollovers, jackknifing, and other loss-of-control situations. Bendix ESP features include roll stability control and yaw control. BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual...
Page 20 BENDIX GSBC SYSTEM FEATURES (CONT ) ROLL STABILITY CONTROL (RSC) Roll Stability Control (RSC) is a feature of Bendix® Electronic Stability Program (ESP®)-equipped vehicles that helps mitigate potential rollovers. RSC counteracts the tendency of a vehicle, or vehicle combination, to tip over while changing direction (typically, while turning).
Page 21 BENDIX GSBC SYSTEM FEATURES (CONT ) YAW CONTROL Yaw control is a feature on vehicles equipped with Bendix® Electronic Stability Program (ESP®) that reduces the risk of jackknifing and other loss-of-control situations. If a vehicle’s tires start to slide during a turn, yaw control counteracts the tendency of that vehicle to spin (or “yaw”), thereby mitigating a potential jackknife or other...
Page 22 NOTE: It may be important to disable the Auto-Hold feature during service or a roadside inspection, for example to check foundation brake stroke (refer to the CVSA [Commerical Vehicle Safety Alliance] 2023-03 – Hill Start Aid/Brake Hold Modes on Power Units bulletin). BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual...
Page 23: Gsbc System - What To Expect
BENDIX GSBC SYSTEM - WHAT TO EXPECT The following charts illustrate what to expect from the Bendix GSBC system in various driving situations you may encounter. Both the system indication, as well as action(s) to expect from the system, are illustrated on the pages that follow.
Page 24 NOTE: The preceding sections show examples of situations and typical Bendix® GSBC system responses. However, the charts do not attempt to cover all possible situations. BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual...
Page 25 NOTE: The preceding sections show examples of situations and typical Bendix® GSBC system responses. However, the charts do not attempt to cover all possible situations. There may be situations where the GSBC system unexpectedly issues...
Page 26: System Maintenance
EQUIPMENT MAINTENANCE Importance of GSBC system maintenance – Optimal GSBC system braking performance requires a properly maintained and inspected system, without any active warning lamps or Diagnostic Trouble Codes (DTCs)
Page 27: Troubleshooting
The location and orientation of the central Electronic Control Unit (ECU) must not be altered When servicing, an identical component must be used in the same orientation using OEM mounting location, brackets, and torque requirements BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual...
Page 28 BENDIX GSBC SYSTEM TROUBLESHOOTING (CONT ) PRESSURE PLAUSIBILITY TESTS In normal operation, the Bendix® GSBC® system uses electronic control signals to control the amount of brake pressure that is delivered to the foundation brakes. To ensure functionality in the event of an electrical failure, the brake system still sends and receives pneumatic signals using the foot brake valve, EPMs, and eTPCM.
Page 29 The Bendix® GSBC® system will constantly monitor the vehicle for the correct set of preconditions and attempt to run the Temporary Backup Mode Test silently in the background without notifying the driver if the correct preconditions are met.
Page 30 The air system is fully charged and must remain above 102 psi for the duration of the test. All liftable axles (if present) are fully lowered and down. The parking brake is released. BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual...
Page 31 If the vehicle was built to tow other air brake vehicles but one is not connected, the test will skip the eTPCM but the counter will not be reset. BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual...
Page 32 Hold the service brake application until the test is complete. NOTE: It can take up to one (1) second for each EPM and eTPCM on the vehicle to be tested. Depending on the vehicle configuration, some GSBC vehicles may have between two and three EPMs and an eTPCM. Other vehicles may have up to four EPMs in addition to one eTPCM.
Page 33 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.
Page 34 The vehicle must be serviced by a qualified technician. NOTE: These dashboard displays and their operation are for representation purposes only. Check with the OEM for actual dashboard displays and operation. BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual...
Page 35 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 BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual...
Page 36 NOTE: This does not necessarily indicate a fault with the foot brake module, only that the test was not operated correctly. To restart the test, refer to Reverse Test Procedure Step 11.B on page 37. BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual...
Page 37 Remain outside the vehicle for at least 90 seconds to allow the brake controller to reset. NOTE: Do not press the brake pedal during this time or the brake controller will not reset. BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual...
Page 38 This will be a persistent fault between key and power cycles and required 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.
Page 39: Acronyms And Definitions
The components between the vehicle and the road including tire, Wheel End wheel, hub, foundation brake, and associated hardware. Yaw Control/Yaw Stability Helps stabilize rotational dynamics of vehicle. Yaw Rate Sensor BW8207 Bendix Global Scalable Brake Control (GSBC) System Operator’s Manual...
Page 40 The trademarks used in this document, including Bendix®, are United States trademarks owned by or licensed to Bendix Commercial Vehicle Systems LLC. BW8207 Rev 000 © 2024 Bendix Commercial Vehicle Systems LLC, a member of Knorr-Bremse • 5/24 • All Rights Reserved Printed on recycled paper...