CHARGING CIRCUIT - ALTERNATOR WITH MONO-FUNCTION REGULATOR
384
ELECTRICALS
Checking the alternator output.
Connect as shown in the diagram opposite, using an ammeter (A), a voltmeter (V), and a
rheostat (R) or a Volt/Ammeter/Rheostat combination.
Referring to the vehicle’s equipment specification (see table opposite), adjust the engine
speed and rheostat charge to obtain U = 13.5 V.
Reminder: The excitation energising current will flow through the warning lamp; check that the
warning lamp comes on when the ignition is switched on. It should go out when the engine has
started (accelerate slightly).
Checking the voltage regulator.
Set the rheostat to zero and disconnect all the
electrical consumers.
With display 5000 rpm and alternator U > 14.7 V,
the regulator is faulty.
Note: These tests should be performed with the
engine hot and the battery fully charged.
D1APO1SC
Output less than 13.5 V
Current (A) / Alternator speed
Speed: 2000 3000 4000
Class rpm rpm rpm
5 29 A 39 A 43 A
7 42 A 54 A 59 A
8 49 A 62 A 68 A
9 62 A 76 A 83 A
12 72 A 90 A 100 A
15 99A 128A 140A
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