throttle grip sensor connector or the control unit connector): if the cable is not ground insu-
lated, restore the wiring. If it is ground 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 ground.
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
DIAGNOSIS INSTRUMENT: ELECTRICAL ERRORS
White upper connector throttle grip position sensor - track C P0152
•
short circuit to positive/ open circuit, short circuit to negative
Error cause
•
If shorted to positive: excessive voltage has been detected at PIN 23 of the ENGINE con-
nector. If the circuit is open, shorted to negative: voltage equal to zero has been detected
at PIN 23 of the ENGINE connector
Troubleshooting
•
shorted to positive: check the value shown by the parameter of the white upper connector
Throttle Grip Position Sensor - track C: disconnect the connector and read the value indi-
cated by the diagnosis instrument: 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.
•
if the circuit is open, shorted to negative: carry out the open circuit, shorted 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 ground insulation (from the throttle grip sensor connector or the control
unit connector): if the cable is not ground insulated, restore the wiring. If it is ground insulated,
and with the key set to ON, check that there is power supply for the potentiometer PIN A
and that PIN C is connected to ground. 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
White upper connector throttle grip position sensor - track D P0153
•
short circuit to positive/ open circuit, short circuit to negative
Error cause
•
If shorted to positive: excessive voltage has been detected at PIN 11 of the ENGINE con-
nector. If the circuit is open, shorted to negative: voltage equal to zero has been detected
at PIN 11 of the ENGINE connector
Troubleshooting
•
shorted to positive: check the value shown by the parameter of the white upper connector
Throttle Grip Position Sensor - track D: disconnect the connector and read the value indi-
RSV4 R Electrical system
ELE SYS - 159
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