08 · Engine

Submerged fuel pump check

Make: Fiat
Model: 500 Factory Service Manual
Year: 2007–2024
Section: Fuel tank and pipes › Submerged fuel pump check

‹ Prev Check on supply voltage and current uptake Next › Fuel supply operation restoration following fuel cut-off intervention

EngineSubmerged fuel pump check

SUBMERGED FUEL PUMP CHECK

Check 1040AB

1.2 8v, 1.4 16v

STEP	CHECK TO BE PERFORMED	REMEDIAL ACTION IF THE CHECK IS NOT OK
1	Check continuity of pump winding Disconnect the battery leads Disconnect pump relay T17 Connect an Examiner in ohmmeter mode between pin 87 of the engine compartment fuse box control unit connector and earth Check that the electric pump winding resistance is 1.5 Ohm±20% at 20°C. Move on to step 2.	Restore the pump earth connection.
2	Electric pump uptake check Disconnect the negative battery lead Disconnect petrol pump relay T17 Reconnect the negative battery lead. Connect 10A pliers N° 1806505000 to the Examiner diagnostic equipment using cable EX01 in Examiner Kit case N° 1806337000 Bridge pin 87 with pin 30 of the connector for relay T17 using a lead fitted with a 15A fuse. Position the 10A ammeter pliers so that they close around the bridge Make sure that the plier jaws are completely closed; this is signalled by the red LED on the pliers going out Check that the current uptake value is between 4 and 8A with a battery voltage of no less than 12.5 Volts.	Replace the fuel supply pump Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R Replace 15A fuse F21, if blown, after having established what caused it to blow 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 Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R. Replace the engine control unit Op. 1056B82 INJECTION/IGNITION SYSTEM E.C.U. (ONE) - R + R

STEP

CHECK TO BE PERFORMED

REMEDIAL ACTION IF THE CHECK IS NOT OK

Check continuity of pump winding

Disconnect the battery leads

Disconnect pump relay T17

Connect an Examiner in ohmmeter mode between pin 87 of the engine compartment fuse box control unit connector and earth

Check that the electric pump winding resistance is 1.5 Ohm±20% at 20°C. Move on to step 2.

Restore the pump earth connection.

Electric pump uptake check

Disconnect the negative battery lead

Disconnect petrol pump relay T17

Reconnect the negative battery lead.

Connect 10A pliers N° 1806505000 to the Examiner diagnostic equipment using cable EX01 in Examiner Kit case N° 1806337000

Bridge pin 87 with pin 30 of the connector for relay T17 using a lead fitted with a 15A fuse.

Position the 10A ammeter pliers so that they close around the bridge

Make sure that the plier jaws are completely closed; this is signalled by the red LED on the pliers going out

Check that the current uptake value is between 4 and 8A with a battery voltage of no less than 12.5 Volts.

Replace the fuel supply pump

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

Replace 15A fuse F21, if blown, after having established what caused it to blow

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

Op. 5505A13 ADDITIONAL JUNCTION UNIT IN ENGINE COMPARTMENT - R.R.

Replace the engine control unit

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

1. Relay T17 connector

2. 10A Ammeter Pliers N° 1806505000

3. Lead with 15A fuse

1.3 Multijet

STEP	CHECK TO BE PERFORMED	REMEDIAL ACTION IF THE CHECK IS NOT OK
1	Check continuity of pump winding Disconnect the battery leads Disconnect pump relay T17 Connect an Examiner in ohmmeter mode between pin 87 of the engine compartment fuse box control unit connector and earth Check that the electric pump winding resistance is 1.5 Ohm ±20% at 20°C. Move on to step 2.	Restore the pump earth connection.
2	Electric pump uptake check Disconnect the negative battery lead Disconnect petrol pump relay T17 Reconnect the negative battery lead. Connect 10A pliers N° 1806505000 to the Examiner diagnostic equipment using cable EX01 in Examiner Kit case N° 1806337000 Bridge pin 87 with pin 30 of the connector for relay T17 using a lead fitted with a 15A fuse. Position the 10A ammeter pliers so that they close around the bridge Make sure that plier jaws are completely closed; this is signalled by the red LED on the pliers going out Check that the current uptake value is between 4 and 8A with a battery voltage of no less than 12.5 Volts.	Replace the fuel supply pump Op. 1040A70 SUBMERGED PUMP ASSEMBLY COMPLETE WITH LEVEL GAUGE CONTROL - R + R Replace 15A fuse F21, if blown, after having established what caused it to blow 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 Op. 5505A13 Replace the engine control unit Op. 1060G80 DIESEL ELECTRONIC INJECTION CONTROL UNIT - R.R