Function
Commands engine starting through the injection control unit.
Operation / Operating principle
The starter button, the brake switches, the starter command relay and the injection control unit between
PIN 5 and 10 are involved.
ELECTRICAL ERRORS
Starter command P0170
- shorted to positive.
Error cause
Shorted to positive: excessive voltage at PIN 10 of the control unit connector.
Troubleshooting
Shorted to positive:
- This malfunction is detected with a brake activated and the starter button pressed (voltage of 12V read
at PIN 5)
- If the battery voltage does not drop (thanks to the absorption of the starter command relay excitation
coil) the control unit understands that PIN 10 is shorted to battery.
- Restore the cabling (if the short is in the cabling) or the relay (if the short is in the relay).
ENGINE TEMPERATURE SENSOR
Function
Serves the purpose of communicating the engine
temperature to the control unit in order to optimise
performance.
Operation / Operating principle
NTC type sensor (resistance sensor, inversely
variable with temperature).
Pinout:
1. Injection ECU
2. Ground from control unit
Engine temperature sensor P0115
- open circuit or shorted to positive / shorted to negative.
Error cause
Open circuit or shorted to positive: interruption of the circuit or excessive voltage at PIN 13 of the control
unit connector. Shorted to negative: null voltage between PIN 13 and 15 of the control unit connector.
Troubleshooting
Open circuit:
- Disconnect the connector of the control unit.
- Measure the resistance value of the sensor at different temperatures between PIN 13 and 15.
- Disconnect the sensor connector.
Vespa LX - S 125 3V ie 150 3V ie (2012)
Electrical system
ELE SYS - 103
Summary of Contents for S 2012
Page 1: ...SERVICE STATION MANUAL 677662 EN Vespa LX S 125 3V ie 150 3V ie 2012 ...
Page 4: ......
Page 6: ...INDEX OF TOPICS CHARACTERISTICS CHAR ...
Page 27: ...INDEX OF TOPICS TOOLING TOOL ...
Page 37: ...INDEX OF TOPICS MAINTENANCE MAIN ...
Page 48: ...INDEX OF TOPICS TROUBLESHOOTING TROUBL ...
Page 52: ...Troubleshooting Vespa LX S 125 3V ie 150 3V ie 2012 TROUBL 52 ...
Page 53: ...INDEX OF TOPICS ELECTRICAL SYSTEM ELE SYS ...
Page 54: ... LX VERSION S VERSION Electrical system Vespa LX S 125 3V ie 150 3V ie 2012 ELE SYS 54 ...
Page 69: ... S VERSION Vespa LX S 125 3V ie 150 3V ie 2012 Electrical system ELE SYS 69 ...
Page 72: ... S VERSION Electrical system Vespa LX S 125 3V ie 150 3V ie 2012 ELE SYS 72 ...
Page 75: ... S VERSION Vespa LX S 125 3V ie 150 3V ie 2012 Electrical system ELE SYS 75 ...
Page 109: ...INDEX OF TOPICS ENGINE FROM VEHICLE ENG VE ...
Page 114: ...INDEX OF TOPICS ENGINE ENG ...
Page 174: ...INDEX OF TOPICS INJECTION INJEC ...
Page 206: ...INDEX OF TOPICS SUSPENSIONS SUSP ...
Page 226: ...Suspensions Vespa LX S 125 3V ie 150 3V ie 2012 SUSP 226 ...
Page 227: ...INDEX OF TOPICS BRAKING SYSTEM BRAK SYS ...
Page 236: ...INDEX OF TOPICS CHASSIS CHAS ...
Page 246: ...INDEX OF TOPICS PRE DELIVERY PRE DE ...
Page 251: ...Tyres 11 V Vehicle 8 110 ...