VESPA GTS Super 125 i.e. Service Station Manual page 111

Vespa GTS Super 125 i.e.
THE FOLLOWING INFORMATION REFER TO THE VERSION EQUIPPED WITH MIU G3 ECU.
FUEL PUMP
ELECTRICAL ERRORS
Fuel pump relay P0230 - shorted to positive / shorted to negative / open circuit.
Error cause
Short circuit to positive:excessive voltage at PIN 22 of the control unit connector.
Short circuit to negative: null voltage at PIN 86 of the injection relay.
Open circuit: circuit interruption.
Troubleshooting
Short circuit to positive:
- Disconnect the injection relay, turn the key to ON and activate the relay through the diagnostics in-
strument.
- Verify the presence of voltage between relay connector PIN 86 and 85 toward the cabling.
- If no voltage is read, disconnect the control unit and verify insulation from battery positive of the relay
PIN 85 (or control unit PIN 22). If necessary, restore the cable harness.
Short circuit to negative:
- Disconnect the injection relay and the control unit.
- Verify ground insulation of the relay connector PIN 86 and 85 toward the cabling: if there is no insu-
lation, restore the cabling.
Open circuit:
- Disconnect the injection relay and the control unit.
- Verify continuity of the cabling between the relay and control unit: Relay PIN 85 - control unit PIN 22.
If necessary, restore the cable harness.
THE FOLLOWING INFORMATION REFER TO THE VERSION EQUIPPED WITH MIU G3 ECU.
COIL
Function
Allows generation of the electrical discharge on
the spark plug, with an increase of voltage.
Pin-out:
1. Power from relay
2. Activation by control unit (control unit side PIN
1)
ELECTRICAL ERRORS
H.V. Coil P0351 - shorted to positive / open circuit or shorted to negative.
Error cause
Short circuit to positive: excessive voltage at PIN 1 of the control unit connector.
Electrical system
ELE SYS - 111