This is optimised at the moment in accordance with the engine revs, engine load, temperature and
environmental pressure.
With the engine at idle, the ignition advance is optimised to stabilise the speed at 1450 ± 50 rpm.
- Magnetisation time
The coil magnetisation time is controlled by the control unit. The power of the ignition is increased during
the engine start-up phase.
The injection system recognises the 4-stroke cycle so ignition is only commanded in the compression
phase.
Specific tooling
020331Y
Digital multimeter
Zeroing the throttle
Resetting the throttle valve position signal (TPS reset)
The throttle body is supplied with throttle valve position sensor and is pre-calibrated.
Pre-calibration entails regulating the minimum opening of the throttle valve to obtain a certain flow of
air under pre-set reference conditions.
Pre-calibration ensures optimal air flow to control idling.
This regulation must not be tampered with in any way whatsoever.
The injection system will complete the management of the idling through the related device and the
variation of the ignition advance.
The throttle body after the pre-calibration has an opened valve with an angle that can vary depending
on the tolerances of the machining of the pipe and the valve itself.
The valve position sensor can also assume various fitting positions. For these reasons the mV of the
sensor with the valve at idle can vary from one throttle body to another.
To obtain the optimum fuel mixture, especially at small openings of the throttle valve, it is essential to
match the throttle body with the control unit following the procedure known as TPS resetting.
With this operation we inform the control unit, as the starting point, of the mV value corresponding to
the pre-calibrated position.
To reset, proceed as follows.
Connect the diagnostic tester.
Shift to «
ON
».
Select the functions of the diagnostic tester on «
TPS RESET
».
Specific tooling
020922Y
Diagnosis Tool
Vespa Primavera125 - 150 i.e. 3Valvole (2013)
Injection
INJEC - 201
Summary of Contents for 150
Page 1: ...SERVICE STATION MANUAL 1Q000118 EN Vespa Primavera125 150 i e 3Valvole 2013 ...
Page 4: ......
Page 6: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Page 27: ...INDEX OF TOPICS TOOLING TOOL ...
Page 37: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Page 51: ...INDEX OF TOPICS TROUBLESHOOTING TROUBL ...
Page 55: ...Vespa Primavera125 150 i e 3Valvole 2013 Troubleshooting TROUBL 55 ...
Page 56: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Page 117: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Page 123: ...INDEX OF TOPICS ENGINE ENG ...
Page 182: ...INDEX OF TOPICS INJECTION INJEC ...
Page 203: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Page 222: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Page 229: ...INDEX OF TOPICS CHASSIS CHAS ...
Page 244: ...INDEX OF TOPICS PRE DELIVERY PRE DE ...
Page 249: ...Transmission 10 53 124 136 Turn indicators 79 Tyres 11 V Vehicle 8 118 119 ...