Check continuity of pump winding

- Disconnect the battery leads

- Disconnect the pump relay

- Connect to the Examiner in ohmmeter mode between pin 87 of the engine compartment fuse box connector and earth

- Check that the electric pump winding resistance is 3 Ohm±20% at 20°C.

Move on to Step 2.

Pump supply check

Connect an Examiner in voltmeter mode between pin 1 of the pump and an earth.

Turn the key to the on position and read the battery voltage of around 12 Volt (in the first 10 seconds).

Move on to Step 3.

- Replace the 15 A fuse F21 if blown after having established the cause of the problem

- Restore the continuity of the wiring between the junction unit and the pump

- Replace the pump relay

- Restore the continuity of the wiring between the junction unit and the engine control unit.

- Replace the junction unit. - Replace the engine control unit

Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R

Electric pump absorption check

Disconnect the negative battery lead

Disconnect the petrol pump relay or the fuse.

Reconnect the negative battery lead.

Position the 10 Amp ammeter clamp for the Examiner equipment on the negative battery lead.

Turn the key to the ON position and check the current absorbed by the ignition-operated electrical consumers (instrument panel only).

Disconnect the negative battery cable.

Reconnect the petrol pump relay or the fuse.

Reconnect the negative battery lead.

Position the ammeter clamp for the Examiner equipment on the negative battery lead.

Turn the key to the ON position and check the current absorbed by the ignition-operated electrical consumers (instrument panel only) and by the electric pump.

Calculate the current absorbed by the pump as the difference between that absorbed by all the consumers (instrument panel only) plus the pump and that by the consumers only (instrument panel only).

The value should fluctuate between 2 and 5 A.

Replace the fuel supply pump

Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R