2. If there is any doubt about the correct operation of the pump, first check for breaks in the pump wiring. Remove the lining from the floor of the luggage compartment and remove the round cover in the floor to gain access to the sensor unit and its connections. Disconnect the plug of the wiring and check for a constant connection between the central and external (brown) wires plug connection
3. If the wiring is normal, it is necessary to check the relay and the pump fuse (No. 5). If the fuse is not blown, check the relay, first disconnecting the halotron connection from the ignition distributor.
4. Remove the fuse box and relay plate cover, then remove the pump relay from position 2.
5. Turn on the ignition and use a voltmeter to check the voltage between contacts No.2 and ground, between contacts No.2 and No.1 and No.4 and No.1.
In each case, the voltmeter should show the battery voltage. Finally, you need to check the voltage between contacts 5 and 1, there should also be voltage between them, as on the battery.
6. Check if there is a voltage drop when the central wire of the plug is briefly connected to ground. If the voltage does not drop during this experiment, the ignition unit should be checked (tCI/N switch). If the voltage drops, the fuel pump relay must be replaced. If the voltage does not drop further, have the halotron ignition unit checked.
7. If after performing the above operations and the necessary repairs the pump does not operate properly, remove the fuel level sensor assembly as described in point 4 and disconnect the pump for replacement.
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8. Installation is carried out in the reverse order of removal.
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