Injector; Fuel Pump - APRILIA RS4 125 Service Station Manual

RS4 125

Injector

Function
To supply the correct amount of petrol at the right timing.
Operation / Operating principle
Injector coil is excited for the petrol passage to open.
Pin-out:
1. Control unit ground
2. Relay powered
CAUTION
BEFORE CARRYING OUT ANY TROUBLESHOOTING, CAREFULLY READ THE GENERAL TROU-
BLESHOOTING CONCEPTS FOR ELECTRICAL DEVICES AT THE BEGINNING OF THE CHECK
AND CONTROL SECTION IN THE ELECTRICAL SYSTEM CHAPTER.
ELECTRICAL ERRORS
Injector P0201 - shorted to positive / shorted to negative / open circuit.
Error cause
Shorted to positive: excessive voltage at PIN 34 of the control unit connector.
Shorted to negative: null voltage at PIN 2 of the injector connector.
The circuit is open: interruption of the circuit.
Troubleshooting
Shorted to positive:
•
Disconnect the injector connector, turn the key to ON and activate the component through
the diagnostics instrument.
•
Verify the absence of voltage at the injector connector PIN 1; if present restore the cable
harness, otherwise proceed with the following checks.
Shorted to negative:
•
Disconnect the injector connector, turn the key to ON and activate the component through
the diagnostics instrument.
•
Verify the presence of voltage at the ends of the injector connector; if there is no voltage,
restore the cable harness, otherwise proceed with the following checks.
The circuit is open:
•
Carry out the check procedure of the injector and control unit connectors.
•
Verify continuity of the cabling between the control unit connector and the injector connector
(control unit PIN 34 - injector PIN 1). If there is no continuity, restore the cable harness.

Fuel pump

CAUTION
BEFORE CARRYING OUT ANY TROUBLESHOOTING, CAREFULLY READ THE GENERAL TROU-
BLESHOOTING CONCEPTS FOR ELECTRICAL DEVICES AT THE BEGINNING OF THE CHECK
AND CONTROL SECTION IN THE ELECTRICAL SYSTEM CHAPTER.
Electrical system
ELE SYS - 119