16 · Electrical

Alternator operation check

Make: Fiat
Model: Bravo Factory Service Manual
Year: 2007–2014
Section: Current generation › Alternator operation check

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Electrical equipmentAlternator operation check

ALTERNATOR OPERATION CHECK

Check 5530AB

1.4 16v TJet

Use a fully charged battery for the test, - the ammeter pliers should be fitted to the battery lead and disconnected with the engine switched off. Take into account that the voltage measured could differ from the standard value depending on the temperature of the regulator as illustrated in the enclosed graph.

STEP	CHECK TO BE PERFORMED	REMEDIAL ACTION IF THE CHECK IS NOT OK
1	Alternator terminal D+ check With the engine running, check that the voltage is more than 5.5 Volts between terminal D+ and earth	Replace the regulator Op. 5530A24 ALTERNATOR VOLTAGE REGULATOR - R.R. WITH ALTERNATOR REMOVED If OK replace the alternator Op. 5530A10 ALTERNATOR - R+R
2	Check the alternator charge with the consumers deactivated Connect the ammeter pliers EX-02 1000 Ampere to the Examiner diagnostic equipment using the EX01 cable. Position the ammeter pliers so that the positive battery lead passes inside the sensitive ring and the cable being examined is enclosed by the ring. Zero the pliers using the CALIBRATION button on the Examiner. Connect a voltmeter to the battery terminals. Deactivate all the consumers. Start the engine and let it reach 2000 rpm Check that the voltage is between 14.2 and 14.8 V (at 20°C) Measure the current and check that it is around 3 A ±10% (at 20°C) Check whether the figures are very high or whether there is overloading (excessive escape of electrolyte), whether the voltage regulator is defective or whether the alternator field coil is short circuited to earth	Check that the alternator drive belt tension is correct. If OK Replace the regulator Op. 5530A24 ALTERNATOR VOLTAGE REGULATOR - R.R. WITH ALTERNATOR REMOVED If OK Replace alternator Op. 5530A10 ALTERNATOR - R+R
3	Check the alternator charge with the consumers activated. Activate the dipped headlights Activate the heated rear windscreen Activate the passenger compartment heater fan at maximum speed Start the engine and let it reach 2000 rpm Check that the voltage is between 13 and 14 V (at 20°C) Measure the current and check that it is around 36 A ±20% (at 20°C)	Check that the alternator drive belt tension is correct. If OK replace the alternator Op. 5530A10 ALTERNATOR - R+R

STEP

CHECK TO BE PERFORMED

REMEDIAL ACTION IF THE CHECK IS NOT OK

Alternator terminal D+ check

With the engine running, check that the voltage is more than 5.5 Volts between terminal D+ and earth

Replace the regulator

Op. 5530A24 ALTERNATOR VOLTAGE REGULATOR - R.R. WITH ALTERNATOR REMOVED

If OK replace the alternator

Op. 5530A10 ALTERNATOR - R+R

Check the alternator charge with the consumers deactivated

Connect the ammeter pliers EX-02 1000 Ampere to the Examiner diagnostic equipment using the EX01 cable.

Position the ammeter pliers so that the positive battery lead passes inside the sensitive ring and the cable being examined is enclosed by the ring.

Zero the pliers using the CALIBRATION button on the Examiner.

Connect a voltmeter to the battery terminals.

Deactivate all the consumers.

Start the engine and let it reach 2000 rpm

Check that the voltage is between 14.2 and 14.8 V (at 20°C)

Measure the current and check that it is around 3 A ±10% (at 20°C)

Check whether the figures are very high or whether there is overloading (excessive escape of electrolyte), whether the voltage regulator is defective or whether the alternator field coil is short circuited to earth

Check that the alternator drive belt tension is correct.

If OK

Replace the regulator

Op. 5530A24 ALTERNATOR VOLTAGE REGULATOR - R.R. WITH ALTERNATOR REMOVED

If OK

Replace alternator

Op. 5530A10 ALTERNATOR - R+R

Check the alternator charge with the consumers activated.

Activate the dipped headlights

Activate the heated rear windscreen

Activate the passenger compartment heater fan at maximum speed

Start the engine and let it reach 2000 rpm