APRILIA SL 750 SHIVER, Service Station Manual, Page: 96 / 303

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if shorted to positive: check the value shown by the parameter of the right Throttle Grip
Position Sensor - track D: disconnect the right side connector and see the value displayed
by the Axone: if the voltage does not vary, there is a short circuit in the cable wiring; replace
the throttle grip sensor if the voltage drops to zero.
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if the circuit is open, short circuit to negative: check the throttle grip sensor connector and
the Marelli control unit connector. If not OK, restore. If OK, check circuit continuity between
the two cable terminals. If not OK, restore; if OK, check the cable earth insulation (from the
throttle grip sensor connector or the control unit connector): if the cable is not earth insulated,
restore the wiring. If it is earth insulated, and with the switch key set to ON, check that there
is power supply for the potentiometer PIN D and that PIN F is connected to earth. If both are
correct, replace the throttle grip sensor; if not, check the continuity of the cable that is not
functioning properly: if there is continuity, replace the control unit; if not, restore the wiring.
AXONE: LOGIC ERRORS
Left side Throttle Grip Position (tracks A-B) P0154 - illogical signals.
Error cause
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Two illogical voltage signals have been detected at PINS 42 and 40 of the VEHICLE con-
nector (tracks A-B)
Troubleshooting
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Check the parameters of the left Throttle Grip Position Sensor - tracks A and B: if one of the
two values clearly deviates from 600-1400 mV, it means that this potentiometer is defective.
Check the throttle grip sensor connector and the control unit connector: if not OK, restore.
If OK, check that cable resistance between the throttle grip sensor connector and the control
unit is a few tenths of Ohm: if this is not the case, restore wiring. If the value is correct,
replace the complete throttle grip sensor.
Right side Throttle Grip Position (tracks C-D) P0155 - illogical signal.
Error cause
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Two illogical voltage signals have been detected at PINS 30 and 44 of the ENGINE con-
nector (tracks A-B)
Troubleshooting
•
Check the parameters of the left Throttle Grip Position Sensor - tracks C and D: if one of the
two values clearly deviates from 600-1400 mV, it means that this potentiometer is defective.
Check the throttle grip sensor connector and the control unit connector: if not OK, restore.
If OK, check that cable resistance between the throttle grip sensor connector and the control
unit is a few tenths of Ohm: if this is not the case, restore wiring. If the value is correct,
replace the complete throttle grip sensor
Throttle Grip position P0156 - illogical signal.
Error cause
Electrical system
SL 750 SHIVER
ELE SYS - 38