APRILIA CAPONORD 1200 Service Station Manual page 140

Electrical system
Electrical characteristics:
PIN 1-2: 0.5 - 1 ohm; PIN 3-4: you do not need to
measure the component electrical resistance
since it works correctly with suitable supply from
the instrument panel only. Check correct operation
as follows: connect in series a bulb of approxi-
mately 2 W: it should turn on if the tank is in
reserve, otherwise, it remains off.
Pin out:
1. + 12 V
2. ground connection
3. ground connection
4. + 12 V (signal)
CAUTION
BEFORE CARRYING OUT ANY TROUBLESHOOTING,
CAREFULLY READ THE GENERAL TROUBLESHOOTING
CONCEPTS FOR ELECTRICAL DEVICES AT THE BEGIN-
NING OF THE CHECK AND CONTROL SECTION IN THE
ELECTRICAL SYSTEM CHAPTER.
DIAGNOSTICS INSTRUMENT: ACTIVATION
Fuel pump
NOTE: The auxiliary injection relay (No. 35 on the electrical circuit diagram, in the two relay box, how-
ever VERIFY the identification of the relay with the colour of the cables) is energised for 30 seconds.
The continuity of the wiring is necessary for correct activation: no error indications are displayed in case
of lack of activation
DIAGNOSTICS INSTRUMENT: ELECTRICAL ERRORS
fuel pump relay control P0230
•
shorted to positive / open circuit, shorted to negative.
Error cause
•
If shorted to positive: excessive voltage has been detected at PIN 73 of the VEHICLE con-
nector. If the circuit is open, shorted to negative: voltage equal to zero has been detected
at PIN 73 of the VEHICLE connector.
Troubleshooting
•
If shorted to positive: check whether the relay electrical specifications are correct by dis-
connecting it from the cable harness. If are not OK, replace the relay; if OK, restore the cable
harness (Brown/Black cable).
•
If the circuit is open, shorted to negative: check the relay electrical characteristics are correct
by disconnecting it from the cable harness; if it is not OK, replace the relay, if it is OK, check
relay connector, engine-vehicle cable harness connector and VEHICLE connector of the
ELE SYS - 140
CAPONORD 1200