APRILIA SL 750 SHIVER Service Station Manual page 119

SL 750 SHIVER
•
The throttle test is not carried out when the key is set to ON because the test could show
unreal errors (because the voltage is too low). Voltage is detected by the Marelli control unit.
Rear throttle control circuit P0186
Example value:short circuit to positive / short circuit to negative / open circuit, overcurrent, excessive
internal temperature.
Error cause
•
If shorted to positive: excessive voltage has been detected at PIN 8A of the throttle control
unit connector. If shorted to negative: no voltage has been detected. If the circuit is open,
there is overvoltage or excessive internal temperature: an interruption or excessive ampere
input or control unit overheating has been detected.
Troubleshooting
•
if shorted to positive: disconnect the throttle body connector, set key to ON and check voltage
at PIN 3: if the voltage read is higher or equal to 5V, there is a short circuit on the cable
harness; replace the throttle body if the voltage is null.
•
if shorted to negative: disconnect the throttle body connector, set the key to ON and check
if PIN 3 is in continuity with the vehicle ground connection: if it is, there is a short circuit in
the cable ground connection; if it is not, replace the throttle body.
•
open circuit, overvoltage, excessive inside temperature: check the throttle body connector
and the throttle control unit connector. If not OK, restore. If everything is OK, disconnect the
throttle body connector (PIN 3) and the throttle control unit connector (C8) and check the
circuit continuity between the two terminals; if there is no continuity, restore the cable har-
ness. If there is continuity, with the throttle body connector connected, check that the
resistance, from the throttle control unit connector, between PIN A8 and C8 is within 1 and
2.5 Ohm; if it is not, replace the throttle body; if it is, check that the throttle body is not
mechanically blocked: if blocked, solve the problem and replace the body; if it is not, replace
the throttle control unit.
AXONE: LOGIC ERRORS
Potentiometer 1 sensor, front throttle position P0121 - signal not valid.
Error cause
•
Signal not within the expected value drawn according to the values of the intake pressure.
Troubleshooting
•
Check the parameter of the Potentiometer 1 Front throttle (voltage) to get which signal the
control unit receives and to compare it to the Potentiometer 1 Rear throttle (voltage). Check
the throttle body connector as well as the throttle control unit connector. Check that cable
resistance between the throttle body connector (PIN 1) and the throttle control unit (PIN 6A)
Electrical system
ELE SYS - 61