NHTSA ID Number: 11016934
Manufacturer Communication Number: SD-27-5023V
TSB/Document Date: 2025-04-10
Summary
Bendix
GSBC (Global Scalable Brake Control) System and EBS-90 Electronic Control Unit (ECU) service data sheets.
Wheel Speed Sensor 5: Missing
Calibration
The deviation between the learned wheel
circumferences and the EOL programmed
values are too large (deviation > 25%).
AA
Shortcut between sensor wiring connected to
the same EPM (shorted channels) Test pulse
is provided for the WSS, and status of all
other wheel speed signals are monitored.
BB
0x501195
20497
149
Wheel Speed Sensor 5: Incorrect
Assembly
0x501231
20498
49
Wheel Speed Sensor 6: No
Signal
Fault is set if WSS changes or drops at
implausible rates (signal is frequently jumping
between 0 and more than 7 mph).
Y
0x501238
20498
56
Wheel Speed Sensor 6: Signal
Frequency Incorrect
Noisy WSS signal WSS faulty.
Z
0x50123A
20498
58
Wheel Speed Sensor 6: Signal
Has Too Many Pulses
Noisy WSS signal WSS faulty.
Z
0x501254
20498
84
Wheel Speed Sensor 6: Missing
Calibration
The deviation between the learned wheel
circumferences and the EOL programmed
values are too large (deviation > 25%).
AA
149
Wheel Speed Sensor 6: Incorrect
Assembly
Shortcut between sensor wiring connected to
the same EPM (shorted channels) Test pulse
is provided for the WSS, and status of all
other wheel speed signals are monitored.
BB
0x501295
20498
Table 18 - GSBC System/ECU Diagnostic Trouble Codes (DTCs)
30
SD-27-5023V Rev 000 Bendix® GSBC® System and EBS-90™ (Global Scalable Brake Control System and Electronic Control Unit)
Troubleshooting
GSBC SYSTEM & ECU DTCS
DTC#
SPN
FMI
DTC NAME
DTC DESCRIPTION
ACTION
0x501331
20499
49
Wheel Speed Sensor 7: No
Signal
Fault is set if WSS changes or drops at
implausible rates (signal is frequently jumping
between 0 and more than 7 mph).
Y
0x501338
20499
56
Wheel Speed Sensor 7: Signal
Frequency Incorrect
Noisy WSS signal WSS faulty.
Z
0x50133A
20499
58
Wheel Speed Sensor 7: Signal
Has Too Many Pulses
Noisy WSS signal WSS faulty.
Z
0x501354
20499
84
Wheel Speed Sensor 7: Missing
Calibration
The deviation between the learned wheel
circumferences and the EOL programmed
values are too large (deviation > 25%).
AA
Shortcut between sensor wiring connected to
the same EPM (shorted channels) Test pulse
is provided for the WSS, and status of all
other wheel speed signals are monitored.
BB
0x501395
20499
149
Wheel Speed Sensor 7: Incorrect
Assembly
0x501431
20500
49
Wheel Speed Sensor 8: No
Signal
Fault is set if WSS changes or drops at
implausible rates (signal is frequently jumping
between 0 and more than 7 mph).
Y
0x501438
20500
56
Wheel Speed Sensor 8: Signal
Frequency Incorrect
Noisy WSS signal WSS faulty.
Z
0x50143A
20500
58
Wheel Speed Sensor 8: Signal
Has Too Many Pulses
Noisy WSS signal WSS faulty.
Z
0x501454
20500
84
Wheel Speed Sensor 8: Missing
Calibration
The deviation between the learned wheel
circumferences and the EOL programmed
values are too large (deviation > 25%).
AA
Shortcut between sensor wiring connected to
the same EPM (shorted channels) Test pulse
is provided for the WSS, and status of all
other wheel speed signals are monitored.
BB
0x501495
20500
149
Wheel Speed Sensor 8: Incorrect
Assembly
0x501531
20501
49
Wheel Speed Sensor 9: No
Signal
Fault is set if WSS changes or drops at
implausible rates (signal is frequently jumping
between 0 and more than 7 mph).
Y
0x501538
20501
56
Wheel Speed Sensor 9: Signal
Frequency Incorrect
Noisy WSS signal WSS faulty.
Z
0x50153A
20501
58
Wheel Speed Sensor 9: Signal
Has Too Many Pulses
Noisy WSS signal WSS faulty.
Z
0x501554
20501
84
Wheel Speed Sensor 9: Missing
Calibration
The deviation between the learned wheel
circumferences and the EOL programmed
values are too large (deviation > 25%).
AA
Shortcut between sensor wiring connected to
the same EPM (shorted channels) Test pulse
is provided for the WSS, and status of all
other wheel speed signals are monitored.
BB
Fault is set if WSS changes or drops at
implausible rates (signal is frequently jumping
between 0 and more than 7 mph).
Y
0x501595
20501
149
Wheel Speed Sensor 9: Incorrect
Assembly
0x501631
20502
49
Wheel Speed Sensor 10: No
Signal
Table 18 - GSBC System/ECU Diagnostic Trouble Codes (DTCs)
SD-27-5023V Rev 000 Bendix® GSBC® System and EBS-90™ (Global Scalable Brake Control System and Electronic Control Unit)
31
Troubleshooting
GSBC SYSTEM & ECU DTCS
DTC#
SPN
FMI
DTC NAME
DTC DESCRIPTION
ACTION
0x501638
20502
56
Wheel Speed Sensor 10: Signal
Frequency Incorrect
Noisy WSS signal WSS faulty.
Z
0x50163A
20502
58
Wheel Speed Sensor 10: Signal
Has Too Many Pulses
Noisy WSS signal WSS faulty.
Z
0x501654
20502
84
Wheel Speed Sensor 10: Missing
Calibration
The deviation between the learned wheel
circumferences and the EOL programmed
values are too large (deviation > 25%).
AA
Shortcut between sensor wiring connected to
the same EPM (shorted channels) Test pulse
is provided for the WSS, and status of all
other wheel speed signals are monitored.
BB
0x501695
20502
149
Wheel Speed Sensor 10:
Incorrect Assembly
0x501721
20503
33
Lining Wear Sensor 1: Signal
Amplitude Less Than Minimum
Lining Wear Sensor: Signal Amplitude Fault
CC
0x501722
20503
34
Lining Wear Sensor 1: Signal
Amplitude Greater Than
Maximum
Lining Wear Sensor: Signal Amplitude Fault
CC
0x501762
20503
98
Lining Wear Sensor 1: Signal
Compare Failure
Lining Wear Sensor: Signal Compare Fault
DD
0x501821
20504
33
Lining Wear Sensor 2: Signal
Amplitude Less Than Minimum
Lining Wear Sensor: Signal Amplitude Fault
CC
0x501822
20504
34
Lining Wear Sensor 2: Signal
Amplitude Greater Than
Maximum
Lining Wear Sensor: Signal Amplitude Fault
CC
0x501862
20504
98
Lining Wear Sensor 2: Signal
Compare Failure
Lining Wear Sensor: Signal Compare Fault
DD
0x501921
20505
33
Lining Wear Sensor 3: Signal
Amplitude Less Than Minimum
Lining Wear Sensor: Signal Amplitude Fault
CC
0x501922
20505
34
Lining Wear Sensor 3: Signal
Amplitude Greater Than
Maximum
Lining Wear Sensor: Signal Amplitude Fault
CC
0x501962
20505
98
Lining Wear Sensor 3: Signal
Compare Failure
Lining Wear Sensor: Signal Compare Fault
DD
0x501A21
20506
33
Lining Wear Sensor 4: Signal
Amplitude Less Than Minimum
Lining Wear Sensor: Signal Amplitude Fault
CC
0x501A22
20506
34
Lining Wear Sensor 4: Signal
Amplitude Greater Than
Maximum
Lining Wear Sensor: Signal Amplitude Fault
CC
0x501A62
20506
98
Lining Wear Sensor 4: Signal
Compare Failure
Lining Wear Sensor: Signal Compare Fault
DD
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
- Ideal for hydraulic and disc brakes
- Ideal for hydraulic and disc brakes
- Mixes well with conventional fluids
- Low-moisture formula provides excellent vapor lock...
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TSB/Document ID: SD-27-5023V
Replacement Service Bulletin Number:
MFR Communication Date: 2025-04-10
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: SERVICE BRAKES
MFR Component System:
MFR Component Subsystem:
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