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ABS system operation information

The operation of the system is based on the analysis of the speed signals for front and rear wheels; the system is automatically deactivated if
either of these signals is missing.

Note
In the event of the ABS control unit detecting a fault in the ABS electronic management system, it activates the specific fault warning indicator
on the instrument panel and restores conventional braking functionality without ABS.
Hydraulic faults in the brake system and faults not directly related to the ABS system (e.g.: worn brake pads) cannot be detected by the ABS
control unit.

Important
The operation of the system is based on the values read for the front and rear wheel speeds; take great care not to damage the phonic wheels
and relative speed sensors when removing the wheels or when working close to these components; the phonic wheels damage may
compromise the operation of the system and cause dangerous malfunctions.

Warning
In case of errors of the IMU control unit, it is necessary to solve first the speed sensor errors and then those of the IMU control unit.

ABS diagnosis

The diagnostic function of the ABS ascertains the functionality of the main system components via hardware/software tests, but cannot modify
the operating parameters of the ABS strategy. From the model menus of the DDS2.0 diagnosis software, select SUPERBIKE family, then model
SBK 1299 Superleggera, and then select bike model year and press Global Scan button. Now connect the tester to the CAN diagnosis socket
on the bike. Wait for the correct configuration to be loaded and, when requested, switch the vehicle to key­on state. Tester communicates to the
different control units present on bike, ABS control unit included; wait for the scan to be completed. Among the displayed information a "dot"
icon is shown: based on its colour, it refers to validated errors inside the different control units. In particular, if errors are stored, icon will be
yellow or if errors are currently present, icon will be red, while if no errors are present, icon will be green. To make a deeper analysis of the ABS
control unit, select ABS control unit and SELF­DIAGNOSIS or, as an alternative, make a double selection on the same item with your mouse.
Once in this configuration, a number of parameters and states of the ABS control unit and information concerning the control unit itself may be
selected and displayed. The INFO ECU menu allows reading the software version loaded on the control unit as well as other information.

Viewable parameters

Front wheel speed sensor impulse time The speed value for the front wheel is displayed in micro­seconds.

Rear wheel speed sensor impulse time The speed value for the rear wheel is displayed in micro­seconds.

Front wheel calliper pressure

Longitudinal acceleration

Wheelie rate

Wheelie angle

ABS pressure measured at front wheel calliper

circuit

Lean angle

Viewable states

Indicates if the electric motor of the hydraulic pump inside the ABS unit is functioning or
ABS pump motor
not.

Rear inlet valve Displays the state of the normally open EV1 rear inlet valve (OFF if open, ON if closed).

Front inlet valve Displays the state of the normally open EV4 rear inlet valve (OFF if open, ON if closed)

Displays the state of the normally closed AV4 rear outlet valve (OFF if closed, ON if
Front outlet valve
open).

Rear outlet valve

Front wheel pressure signal

Front wheel speed signal

Rear wheel speed signal

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Longitudinal acceleration sensor signal

ABS intervention

Pitch rate sensor signal

Roll angle sensor signal

Pitch angle sensor signal

Cornering ABS

Generic error warning light

Low battery voltage function

ABS initialisation

ABS light

Set ABS calibration

Lean angle sensor

Select the function "View errors"

This tester function provides the user with information concerning the error list in the ABS control unit memory, indicating if errors are stored or
current. The following codes are given after a short description of the diagnosis type: MEM, indicating that the error has been stored previously
by the ABS control unit but has not been detected in the current test session. ATT, indicating that the error is current and has been detected
during the current test session.

Note
While ATT indicates that the error has been found during the current test session, it does not necessarily indicate that the error is actually active
at the time of indication. For example: disconnecting the front wheel speed sensor causes the code ATT to be displayed after the error
description, but the code continues to be displayed even once the cause of its activation has been eliminated by reconnecting the sensor, as the
ABS will only check sensor operation again after the next key­off/key­on cycle. As a result, always perform a key­on/key­off cycle after any work
on the ABS system, interrupting and re­establishing communication between the diagnostic instrument and the ABS control unit before checking
the updated ABS error list again.

Error code Error string

C1014 ABS control unit solenoid valve control relay

C1015 ABS pump motor fault

C1021 ABS control unit fault

C1024 Speed sensor [Front and rear wheel speed comparison error]

C1031 Rear wheel speed sensor [Open circuit and short­circuit to ground or positive]

C1032 Rear wheel speed sensor [Mismatching signal]

C1033 Front wheel speed sensor [Open circuit and short­circuit to ground or positive]

C1034 Front wheel speed sensor [Mismatching signal]

C1048 ABS rear outlet valve fault

C1049 ABS front outlet valve fault

C1052 ABS rear inlet valve fault

C1054 ABS front inlet valve fault

C1058 ABS control unit [Undervoltage]

C1059 ABS control unit [Overvoltage]

C1092 IMU sensor [Wrong installation]

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C1094 IMU sensor [Mismatching signal]

C1331 Front brake calliper pressure sensor inside ABS control unit [Hardware error]

C1332 Front brake calliper pressure sensor inside ABS control unit [Offset error]

C1333 Pressure sensor power supply error inside the ABS control unit

C1334 ABS control unit [Error in EEPROM during coded variant reading]

C1335 Wrong variant

U2922 CAN line error (BUS­OFF)

U2923 CAN communication error with instrument panel control unit

U2924 CAN communication error with BBS control unit

U2925 Faulty CAN control unit [Generic hardware error]

U2926 CAN communication error with BBS control unit [Frame counter]

U2927 IMU sensor [Wrong signal]

U2928 IMU sensor [Timeout]

U2929 CAN communication error with engine ECU

U2930 CAN line [Undervoltage]

U2931 CAN line [Overvoltage]

The abbreviations for all the errors displayed are given as follows:

Select the function "ABS system information"

This tester function displays the identification data for the ABS system, such as Software version and BARCODE
e.g.:
Software Version 6789
Barcode Data: HQOJM98200RA

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