MOTO GUZZI Stelvio 1200 NTX ABS Service Station Manual page 252

Braking system
If the 10A fuse is defective, the ABS warning light remains on. Axone does not communicate with the
ABS module. That is, it is not valid in case of failure of 40A or 25A fuses even if the ABS warning light
is activated.
If only the speed indication on the instrument panel does not work, it may be due to:
1) lack of speed indication and turning on of ABS warning light and the EFI.
The cause is to be found in a malfunction of the circuit between the speed sensor and the ABS module,
connect the Axone to the ABS module connector and check the speed sensor circuit.
2) lack of speed indication and turning on of the EFI warning light.
The cause is to be found in a malfunction of the circuit between the ABS module and the injection control
unit, connect the Axone to the injection control unit connector and check the cable connecting the ABS
module and the injection control unit.
3) lack of speed indication.
The cause is to be found in a malfunction of the instrument panel. If the ABS module and the injection
control unit have NOT detected errors and if any abnormal indications do not appear on the instrument
panel, it means that the CAN line is operating correctly and that the instrument panel speed indication
does not work due to the instrument panel.
In case of ABS warning light turns on and the ABS control deactivates, the following situations may
occur: Axone does not communicate with the ABS module or it detects one or more errors.
AXONE DOES NOT COMMUNICATE WITH THE CONTROL UNIT
Description of the defect:lack of ground connection at pins 13 and 38 of the control unit and/or lack of
power supply at pin 32 of the control unit. Checks: Check the ground connection lead to the battery
negative pole (specific cable for the ABS module, different from the ground cable of the ignition system).
Solution: restore the correct cable harness connection
If functioning is correct, proceed to the next check
Checks: disconnect the ABS module connector and check the ground connection continuity between
pin 38 and the battery negative pole and between pin 13 and the battery negative pole.
If functioning is correct, proceed to the next check
Checks: check the 10A fuse and wiring coming from the key panel (disconnect the ABS module con-
nector and with the key set to ON, check if there is battery voltage in pin 32). Solution: restore the fuse
or the wiring
- AXONE ERROR FRONT SPEED SENSOR OPEN CIRCUIT OR SHORT CIRCUIT
Description of the defect: the control unit detects an abnormal voltage in the front speed sensor signal.
Checks: check battery voltage on the orange/white cable between pin 2 of the front speed sensor
connector and pin 21 of the ABS module connector. If there is not enough voltage, check cable continuity
from the ABS module to the speed sensor connector and make sure that the cable is grounded insulated.
Solution: restore wiring. It is normal that when the speed sensor connector is disconnected, no voltage
is detected.
If functioning is correct, proceed to the next check.
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BRAK SYS - 252
Stelvio 1200 NTX ABS