DIAGNOSIS INSTRUMENT: ACTIVATION
Fan
•
The fan relay (No. 36 in the wiring dia-
gram, placed in the headstock niche,
left side; CHECK, however, the identi-
fication of the relay with the colour of
the cables) is energised for 10 sec-
onds. The continuity of the wiring is
necessary for correct activation: no er-
ror indications are displayed in case of
lack of activation
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.
DIAGNOSIS INSTRUMENT: ELECTRICAL ERRORS
Cooling fan relay P0480
•
short circuit to positive/ short circuit to negative / open circuit
Error cause
•
If shorted to positive: excessive voltage has been detected at PIN 61 of the VEHICLE con-
nector. If shorted to negative: no voltage has been detected. If the circuit is open: 5V voltage
has been detected. Error recognition carries out only when the fan relay is activated.
Troubleshooting
•
If shorted to positive: check the relay electrical specifications are correct by disconnecting
it from the cable harness. If not OK, replace the relay; if OK, restore the cable harness (brown
cable)
•
If shorted to negative: check the relay electrical specifications are correct by disconnecting
it from the cable harness. If not OK, replace the relay; if OK, restore the cable harness (brown
cable)
•
If the circuit is open: 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 Marelli control unit:
if not OK, restore; if OK, check continuity of cable harness (brown cable)
Electrical system RSV4 R
ELE SYS - 206
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