Aprilia:

Electric fan circuit (Aprilia Shiver 750)

Contents: Function ↓ Operating principle ↓

Function

Radiator fan and coolant - Operation.

Operating principle

When the control unit detects a temperature of approx. 102°C, it closes the fan control relay pickup circuit to ground.

Level in wiring diagram: electric fan

Location: the relay is located under the fuel tank, left side, first front relay (CHECK, however, the identification of the relay with the colour of the cables).

Electrical characteristics:

relay normally open;
drive coil resistance 110 Ohm (+/- 10 %)

drive coil resistance 110 Ohm (+/- 10 %)

Axone: statuses

Fan relay

Example value: on/off

Axone: activations

Fan

The fan relay (No. 44 in the wiring diagram, placed under fuel tank, left side, first front relay; CHECK, however, the identification of the relay with the colour of the cables) is energised for 10 seconds. The continuity of the wiring is necessary for correct activation: no error indications are displayed in case of lack of activation.

Axone: electrical errors

Cooling fan relay P0480 - shorted to positive / shorted to negative / open circuit.

Error cause

If shorted to positive: excessive voltage has been detected at PIN 54 of the VEHICLE connector.

The article is based on materials from the website: motoinstruction.ru

If shorted to negative: short circuit to ground detected.

If the circuit is open: interrupted circuit detected. Excessive voltage can only be detected after the fan relay gets activated.

Troubleshooting

If shorted to positive: check the relay electrical specifications are correct by disconnecting it from the cable harness. If they are not correct, replace the relay; if correct, restore the cable harness (pink/blue cable).

If shorted to negative: check the relay electrical specifications are correct by disconnecting it from the cable harness. If they are not correct, replace the relay; if correct, restore the cable harness (pink/blue cable).

If the circuit is open: check the relay connector and the Marelli control unit VEHICLE connector: If not OK, restore; if OK, restore the cable harness (red/blue cable).

See this article in russian language

This article has been reviewed: Serafim Sazonov

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Aprilia SL750 : Equipment and devices

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Instrument panel air temperature sensor
Bank angle sensor/fall sensor
Side stand sensor
Clutch lever sensor

Run / stop switch
Throttle control unit
Connectors pin out
CAN line — function and troubleshooting

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