APRILIA SCARABEO 500 2008 Service Station Manual page 236

Injection
Possible Cause
Fuel supply
Correctness of the parameters
Engine stops at idle
ENGINE DOES NOT HOLD IDLING/ IDLING IS UNSTABLE/ IDLING TOO LOW
Possible Cause
Faults detected by self-diagnosis
Ignition efficiency
Correctness of the parameters
Intake system cleaning
Intake system seal (seepage)
Fuel supply (low pressure)
Engine does not rev down
ENGINE DOES NOT RETURN TO IDLING/IDLING TOO HIGH
Possible Cause
Faults detected by self-diagnosis
Ignition efficiency
Correctness of the parameters
INJEC - 236
Operation
Ignition advance
Fuel pressure (low)
Injector flow (low)
Injector seal (poor)
Coolant temperature
Intake air temperature Stepper throttle valve posi-
tion (steps and actual opening)
Cleaning the auxiliary air pipe and air filter effi-
ciency throttle valve
Operation
Pump relay
HV coil
Injector
Revolution timing sensor
Air temperature
Coolant temperature
Spark plug
Ignition timing
Throttle valve position sensor
Stepper
Coolant temperature sensor
Intake air temperature sensor
Air filter
Diffuser and throttle valve
Supplementary air pipe and Stepper
Intake manifold - head
Throttle body - manifold
Intake manifold
Filter housing
Fuel pump
Pressure regulator
Fuel filter
Injector flow
Operation
Pump relay
HV coil
Injector
Revolution timing sensor
Air temperature
Coolant temperature
Ignition timing
Throttle valve position sensor
Stepper
SCARABEO 500