Internal software fault detected.

AA

0xF00061

61440

97

Electronic Control Unit: Signal
Calculation Failure

Internal software fault detected.

AA

0xF00062

61440

98

Electronic Control Unit: Signal
Compare Failure

Internal software fault detected.

AA

0xF00063

61440

99

Electronic Control Unit: Circuit/
Component Protection Time-Out

Internal software fault detected.

AA

0xF00064

61440

100

Electronic Control Unit: Signal
Plausibility Failure

Internal software fault detected.

AA

0xF00066

61440

102

Electronic Control Unit: Signal
Has Too Many Transitions/Events

Lifetime cyce limit exceeded for valve(s).

DDD

0xF00068

61440

104

Electronic Control Unit: Event
Information

Internal software fault detected.

AA

0xF00092

61440

146

Electronic Control Unit:
Performance or Incorrect
Operation

Internal software fault detected.

AA

0xF00094

61440

148

Electronic Control Unit:
Unexpected Operation

Internal GSBC ECU electronic fault.

R

0xF00096

61440

150

Electronic Control Unit:
Component Internal Failure

Internal software fault detected.

EEE

0xF0009A

61440

154

Electronic Control Unit:
Component or System Operating
Conditions

Internal software fault detected.

FFF

0xF0009D

61440

157

Electronic Control Unit:
Component or System Under
Temperature

GSBC ECU is under minimum temperature.

GGG

0xF00316

61443

22

Battery Power: Circuit Voltage
Below Threshold

Battery voltage supplied to GSBC ECU is too
high or too low.

HHH

0xF00317

61443

23

Battery Power: Circuit Voltage
Above Threshold

Battery voltage supplied to GSBC ECU is too
high or too low.

HHH

0xF0031C

61443

28

Battery Power: Circuit Voltage
Out of Range

Battery voltage supplied to GSBC ECU is too
high or too low.

HHH

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)

39

Troubleshooting

DIAGNOSTIC CODE (DTC) AND SERVICE INFORMATION (CONT.)
SERVICE ACTION CODE TABLE
NOTE: Prior to servicing a vehicle, refer to the General Safety Guidelines on page 2.

SERVICE
ACTION CODE

RECOMMENDED SERVICE ACTION
Check steering system for damage (drag link, steer arm, pitman arm, i-shaft, steering gear). Check
the mounting of the SAS to the steering column. Replace the sensor if it is damaged.

A

Check if SAS is calibrated correctly (0 degree in straight-line position.Calibrate sensor if it is not
correctly calibrated. Clear fault. Perform an ECU reset (Turn ignition off, release brake pedal, wait 90
seconds without touching a control, then start vehicle) followed by a short test drive (including driving
both in a straight line and turns). If fault returns, replace the SAS.

B

Recalibrate the SAS. If this fault returns, replace the SAS.

C

Check wire harness and connector pins on SAS. Sensor should receive 12Vdc from the harness, and
measure for proper resistance between the high and low CAN pins on the harness. Clear fault. If fault
returns, replace the SAS.

D

SAS is installed but ESP is not enabled. Check if vehicle and ECU configuration match. If
configuraiton is not correct, contact vehicle OEM for assistance.
Mismatch between SAS and YAS readings.
Check if SAS is calibrated correctly: with engine running, set steered wheels in straight position.
Read SAS via diagnostics and check if the value of SAS is 0 +10 degrees. If value is not OK,
recalibrate the sensor.
While engine is still running, mark zero position on the steering wheel, and turn it in both directions by
one turn (360 degrees). Check the steering angle values via diagnostics are +360 +10 degrees (sign
should be negative while turning left and positive while turning right).
If values are not OK, check the mounting and the steering shaft interface of the SAS matches OEM
installation requirements.

E

With engine running turn the steering wheel to its end positions, read the steering angle values via
diagnostics and check if the read values are equivalent to each other in each direction.
If fault is still present, check steering system for damage (drag link, steer arm, pitman arm, i-shaft,
steering gear).
If fault is still active, replace the SAS and recalibrate SAS.
Check whether wheelbase and wheel track correspond to the vehicle specifications as built. If vehicle
has been modified, contact the OEM for assistance in updating the vehicle parameters.
Check that the ECU is mounted in its original orientation.
Perform an ECU reset, (turn ignition off, release brake pedal, wait 90 seconds without touching a
control, then start vehicle) followed by a short test drive (including driving both in a straight line and
turns). If fault returns, replace GSBC Central ECU (YAS is an internal non-serviceable component
inside the GSBC Central ECU).

Table 19 – GSBC System/ECU Service Action Codes

40

SD-27-5023V Rev 000 Bendix® GSBC® System and EBS-90™ (Global Scalable Brake Control System and Electronic Control Unit)

Troubleshooting
SERVICE
ACTION CODE

RECOMMENDED SERVICE ACTION
Check if SAS is calibrated correctly: with engine running, set steered wheels in straight position.
Read SAS via diagnostics and check if the value of SAS is 0 +10 degrees. If value is not OK,
recalibrate the sensor.
While engine is still running, mark zero position on the steering wheel, and turn it in both directions by
one turn (360 degrees). Check the steering angle values via diagnostics are +360 +10 degrees (sign
should be negative while turning left and positive while turning right).

F

If values are not OK, check the mounting and the steering shaft interface of the SAS matches OEM
installation requirements.
With engine running turn the steering wheel to its end positions, read the steering angle values via
diagnostics, and check if the read values are equivalent to each other in each direction.
If fault is still present, check steering system for damage (drag link, steer arm, pitman arm, i-shaft,
steering gear).
If fault is still active, replace the SAS and recalibrate SAS.

G

Check the SAS connector and wiring harness for a short on CAN High and CAN Low.

H

Ensure vehicle is on level ground. Check that the mounting position of the GSBC Central ECU is in
the original position and all mounting bolts are properly torqued. Perform End of Line calibration of
Lateral acceleration sensor (LAS). Perform an ECU reset (Turn ignition off, release brake pedal, wait
90 seconds without touching a control, then start vehicle) followed by a short test drive (including
driving both in a straight line and turns). If fault returns, replace the GSBC Central ECU.

J

Ensure vehicle is on level ground. Perform End of Line calibration of LAS.
Ensure vehicle is on level ground. Check that the mounting position of the GSBC Central ECU is
in the original position and all mounting bolts are properly torqued. Check whether wheelbase and
wheel track correspond to the vehicle specifications as built. If vehicle has been modified, contact the
OEM for assistance in updating the vehicle parameters.

K

Perform End of Line calibration of LAS.
Perform an ECU reset, (turn ignition off, release brake pedal, wait 90 seconds without touching
a control, then start vehicle) followed by a short test drive (including driving both in a straight line
and turns). During road test, confirm that vehicle speedometer is reporting an accurate value and
matches brake controller reported speed.
If fault does not clear or fault returns, replace the GSBC Central ECU.

Table 19 – GSBC System/ECU Service Action Codes

SD-27-5023V Rev 000 Bendix® GSBC® System and EBS-90™ (Global Scalable Brake Control System and Electronic Control Unit)

41

Troubleshooting
SERVICE
ACTION CODE

RECOMMENDED SERVICE ACTION
Ensure vehicle is on level ground. Check that the mounting position of the GSBC Central ECU is
in the original position and all mounting bolts are properly torqued. Check whether wheelbase and
wheel track correspond to the vehicle specifications as built. If vehicle has been modified, contact the
OEM for assistance in updating the vehicle parameters.
Perform End of Line calibration of YAS.
Check if SAS is calibrated correctly: with engine running, set steered wheels in straight position.
Read SAS via diagnostics and check if the value of SAS is 0 +10 degrees. If value is not OK,
recalibrate the sensor.
While engine is still running, mark zero position on the steering wheel, and turn it in both directions by
one turn (360 degrees). Check the steering angle values via diagnostics are +360 +10 degrees (sign
should be negative while turning left and positive while turning right).

L

If values are not OK, check the mounting and the steering shaft interface of the SAS matches OEM
installation requirements.
With engine running turn the steering wheel to its end positions, read the steering angle values via
diagnostics and check if the read values are equivalent to each other in each direction.
If fault is still present, check steering system for damage (drag link, steer arm, pitman arm, i-shaft,
steering gear).
If fault is still active, replace the SAS and recalibrate SAS.
Perform an ECU reset, (turn ignition off, release brake pedal, wait 90 seconds without touching
a control, then start vehicle) followed by a short test drive (including driving both in a straight line
and turns). During road test, confirm that vehicle speedometer is reporting an accurate value and
matches brake controller reported speed.
If fault does not clear or fault returns, replace the GSBC Central ECU (YAS is an internal, nonserviceable part of the GSBC Central ECU).
Ensure vehicle is on level ground. Check that the mounting position of the GSBC Central ECU is
in the original position and all mounting bolts are properly torqued. Check whether wheelbase and
wheel track correspond to the vehicle specifications as built. If vehicle has been modified, contact the
OEM for assistance in updating the vehicle parameters.

M

Perform End of Line calibration of LAS.
Perform an ECU reset, (turn ignition off, release brake pedal, wait 90 seconds without touching a
control, then start vehicle) followed by a short test drive (including driving both in a straight line and
turns). During road test, make multiple starts at varying acceleration rates from a stop while travelling
in a straight line.
If fault does not clear or fault returns, replace the GSBC Central ECU.

Table 19 – GSBC System/ECU Service Action Codes

42

SD-27-5023V Rev 000 Bendix® GSBC® System and EBS-90™ (Global Scalable Brake Control System and Electronic Control Unit)

Troubleshooting
SERVICE
ACTION CODE

RECOMMENDED SERVICE ACTION
Ensure vehicle is on level ground. Check that the mounting position of the GSBC Central ECU is in
the original position and all mounting bolts are properly torqued.
Address any WSS faults that may be active on the vehicle. Verify proper operation and position of
WSSs.

N

Clear DTC.
Perform an ECU reset, (turn ignition off, release brake pedal, wait 90 seconds without touching a
control, then start vehicle) followed by a short test drive (including driving both in a straight line and
turns).
If fault does not clear or fault returns, replace the GSBC Central ECU.
Ensure vehicle is on level ground. Check that the mounting position of the GSBC Central ECU is in
the original position and all mounting bolts are properly torqued.
Address any WSS faults that may be active on the vehicle. Verify proper operation and position of
WSSs.

P

Clear DTC.
Perform an ECU reset, (turn ignition off, release brake pedal, wait 90 seconds without touching a
control, then start vehicle) followed by a short test drive. During road test, make multiple starts at
varying acceleration rates from a stop while travelling in a straight line.
If fault does not clear or fault returns, replace the GSBC Central ECU.
Ensure vehicle is on level ground. Check that the mounting position of the GSBC Central ECU is in
the original position and all mounting bolts are properly torqued.
Clear DTC.

Q

Perform an ECU reset, (turn ignition off, release brake pedal, wait 90 seconds without touching a
control, then start vehicle) followed by a short test drive (including driving both in a straight line and
turns).
If fault does not clear or fault returns, replace the GSBC Central ECU.

R

Clear fault. If fault returns, replace the GSBC Central ECU.

S

YAS is installed but ESP is not enabled. Check if vehicle and ECU configuration match. If
configuraiton is not correct, contact vehicle OEM for assistance.

T

Check the mounting of the sensor. Check whether wheelbase and wheel track correspond to the
vehicle specification in the dataset and download correct dataset. Check mounting of SAS. Perform
End of Line calibration of SAS. Perform End of Line calibration of Lateral Acceleration Sensor . If
fault is still active after ECU reset (ignition off/on, brake pedal released) and short driving maneuver
(straight line and curve), replace the YAS/GSBC Central ECU.

U

Check for other ESP sensor related faults (for example, Steer Angle Sensor, YAS and Wheel Speed
Sensor, etc.) and correct as needed.
If no other faults are active, replace the GSBC Central ECU.

Table 19 – GSBC System/ECU Service Action Codes

SD-27-5023V Rev 000 Bendix® GSBC® System and EBS-90™ (Global Scalable Brake Control System and Electronic Control Unit)

43

Troubleshooting
SERVICE
ACTION CODE

RECOMMENDED SERVICE ACTION
Switch off the GSBC Central ECU. Disconnect the SAS connector (X5) from the GSBC Central ECU
and switch on the GSBC Central ECU again. Note: DTCs related to “ESP sensor communication
interrupted” will appear additionally during this procedure; ignore them and erase them at the end of
the test procedure.
If sensor supply error becomes active again with SAS disconnected from the GSBC Central ECU,
then the GSBC Central ECU is the source of the problem. Replace the GSBC Central ECU.

V

If sensor supply error does not become active again, then the fault is either in the wiring or in the SAS
itself.
To check the wiring harness, disconnect the SAS from the vehicle wiring harness. Check the vehicle
wiring harness between the GSBC Central ECU and SAS for short circuits between pins. Repair
wiring harness if faults are found.
If wiring is OK, replace the SAS, (located in the steering column) ensuring that vehicle ECU is
powered off.
Confirm that fault is fixed by reconnecting the wiring harness, repowering the ECU, and clearing any
active DTCs.
SAS supply voltage low. Measure supply voltage to GSBC Central ECU. ECU power supply/battery
voltage must be greater than 15V. If battery voltage is below 15V, charge or repair vehicle power
system before proceeding.

W

Once vehicle battery voltage is above 15V, disconnect SAS wiring from GSBC Central ECU. Measure
SAS power supply pin voltage at GSBC Central ECU. If SAS supply voltage is less than 10V with
adequate battery voltage at GSBC Central ECU, then the GSBC Central ECU has an internal
electronic failure that requires replacement of the GSBC Central ECU.
If ECU power supply is adequate and DTC is still present, reconnect SAS wiring at GSBC Central
ECU and disconnect SAS from vehicle harness in steering column. Measure supply voltage at
vehicle harness pins. If supply voltage is below 10V, repair or replace vehicle harness as necessary.
If voltage measured at vehicle harness is above 10V and DTC can not be cleared, replace SAS.
If DTC can be cleared but reappears intermittently, check all connections between the GSBC Central
ECU and SAS, as well as checking harness for damaged wiring.
SAS supply voltage high. Measure supply voltage to GSBC Central ECU. ECU power supply/battery
voltage must be less than 60.5V. If Battery voltage is above 60.5V, repair vehicle power system
before proceeding.
Once vehicle battery voltage is within normal operating range, disconnect SAS wiring from GSBC
Central ECU. Measure SAS power supply pin voltage at GSBC Central ECU. If SAS supply voltage
is outside the range of 12 +2V with normal battery voltage at GSBC Central ECU, then the GSBC
Central ECU has an internal electronic failure that requires replacement of the GSBC Central ECU.

X

If ECU power supply is adequate and DTC is still present, reconnect SAS wiring at GSBC Central
ECU and disconnect SAS from vehicle harness in steering column. Measure supply voltage at
vehicle harness pins. If supply voltage is above 14V, repair or replace vehicle harness as necessary.
If voltage measured at vehicle harness is within the range of 12V +2V and DTC can not be cleared,
replace SAS.
If DTC can be cleared but reappears intermittently, check all connections between the GSBC Central
ECU and SAS, as well as checking harness for damaged wiring.

Table 19 – GSBC System/ECU Service Action Codes

44

SD-27-5023V Rev 000 Bendix® GSBC® System and EBS-90™ (Global Scalable Brake Control System and Electronic Control Unit)

Troubleshooting
SERVICE
ACTION CODE

RECOMMENDED SERVICE ACTION
Check WSS for damage. Replace sensor if it is mechanically damaged.
Check WSS mounting to ensure that the sensor is rigidly held in place. Correct any mounting errors
or damage discovered.
Check the tone wheel for dirt and metallic particles, and for the correct number of teeth. Clean tone
wheel if necessary, and replace if damage is discovered. Check wheel end for excessive bearing end
play, and repair wheel bearing as necessary per OEM guidelines.
Check and correct air gap between WSS and tone wheel by measuring the wheel speed signal. WSS
signal must be higher than 100mV peak to peak (0.1VAC) at wheel speed of roughly 2 mph. If air gap
is incorrect, re-adjust sensor and repeat test.
Check the cables and connectors between EPM and wheel-speed sensor for shorted or open circuits.

Y

Remove WSS connector from EPM. At WSS wiring harness connector, measure resistance across
two pins of wheel speed sensor harness. Resistance must be between 800 and 2000 Ohms.
Measure resistance of between sensor pins and vehicle GND. Resistance must be greater than 200
kOhm.
If either resistance measurement is outside measured range, disconnect wheel speed sensor from
vehicle harness (if applicable) and re-check sensor pins. If test fails, replace sensor. Otherwise,
investigate vehicle harness per OEM procedure for short or open circuit.
Measure voltage between EPM GND and either WSS pin (with the wheel speed sensor connected to
the EPM electrical connector). Voltage must in range 0.5-4.3V. If voltage is not present and harness
is known good, proceed to next step.
Switch left and right WSS and repeat all tests above. If problem remains on the same side of the
vehicle, replace EPM. Otherwise, switch sensors back and replace indicated WSS/harness.
Check WSS for damage. Replace sensor if it is mechanically damaged.
Check WSS mounting to ensure that the sensor is rigidly held in place. Correct any mounting errors
or damage discovered.
Check the tone wheel for dirt and metallic particles, and for the correct number of teeth. Clean tone
wheel if necessary, and replace if damage is discovered. Check wheel end for excessive bearing end
play, and repair wheel bearing as necessary per OEM guidelines.
Check and correct air gap between WSS and tone wheel by measuring the wheel speed signal. WSS
signal must be higher than 100mV peak to peak (0.1VAC) at wheel speed of roughly 2 mph. If air gap
is incorrect, re-adjust sensor and repeat test.

Z

Check the cables and connectors between EPM and wheel-speed sensor for shorted or open circuits.
Remove WSS connector from EPM. At WSS wiring harness connector, measure resistance across
two pins of wheel speed sensor harness. Resistance must be between 800 and 2000 Ohms.
Measure resistance of between sensor pins and vehicle GND. Resistance must be greater than 200
kOhm.
If either resistance measurement is outside measured range, disconnect wheel speed sensor from
vehicle harness (if applicable) and re-check sensor pins. If test fails, replace sensor. Otherwise,
investigate vehicle harness per OEM procedure for short or open circuit.
If all checks pass and DTC cannot be cleared, confirm that configuration stored in the GSBC Central
ECU corresponds to wheel rolling circumference and tone wheel teeth number. If it does not match,
then correct the configuration values or contact the OEM for assistance in downloading the correct
dataset.

AA

Check if tire size of all tires matches according vehicle configuration as built, and confirm that the tire
size for all tires has been configured in GSBC Central ECU and matches tires installed on vehicle.
Check the number of teeth on each tone wheel on all wheel ends, and confirm that they match the
configuraiton loaded into the GSBC Central ECU.

Table 19 – GSBC System/ECU Service Action Codes

SD-27-5023V Rev 000 Bendix® GSBC® System and EBS-90™ (Global Scalable Brake Control System and Electronic Control Unit)

45

Troubleshooting
SERVICE
ACTION CODE

RECOMMENDED SERVICE ACTION
Check for shorts between different WSS connected to the same EPM.

BB

Check the cables and connectors between EPM and wheel-speed sensor for damage, shorted, or
open circuits.
Trace the WSS with the fault back to the EPM. Remove all WSSs connected to that EPM. Measure
resistance between sensor pins (any pin) of different WSS connectors on harness. Resistance must
be greater than 200 kOhm. If resistance is less than 200 kOhm, WSSs are shorted together. Repair
or replace WSS and/or vehicle harness as necessary to eliminate short.