Alternator And Regulator Circuit Test - Honda S2000 Service Manual

Alternator and Regulator Circuit Test
l. Be sure the battery connections are good, and that
the battery is sufficiently charged and in good
condition (see page 22 39).
2. Connect a VAT-40 (or equivalent tester), and turn
the selector switch to position 1 (starting).
LOAD AOJUSTER FULL FIELD TESTER
{CARBON PILE)
LEAD IBLU)
VOLT
SELECTOR
VOLTMETER
NEGATIVE
LEAO IBLK)
VOLTMETER
POSITIVE
LEAD {RED)
FIELD
SELECTOR
TEST SELECTOR
swtTcH
\ "h'u. rr"r.*
\caBLE {BLK)
POSITIVE TESTER
CABLE IRED)
INDUCTIVE
PICK.UP
INOUCTIVE
PICK-UP IGRN)
TERMINAL
3 .
4.
6 .
7 .
Shift to Neutral, and start the engine. Hold the
engine at 3,000 rpm, with no load until the radiator
fan comes on, then lel it idle.
R a i s e t h e e n g i n e s p e e d t o 2 , 0 0 0 r p m , a n d h o l d i t
t h e r e .
Is thete voltage over 15.1 V?
Y E S R e p l a c e t h e r e a r h o u s i n g a s s e m b l y . l
NO Go to step 5.
Release the accelerator pedal, and let the engine
i d l e .
Make sure all accessories are turned off. Turn the
selector switch to position 2 (charging).
Remove the inductive pick-up, and zero the
ammeter.
Place the inductive pick-up over the B terminal wire
of the alternator so that the arrow points away from
the alternator.
8 .
4-23
L Raise the engine speed to 2.000 rpm, and hold it
t h e r e .
ls there voltage Iess than 13.5 V?
YES Go to Alternator Control System Test,l
NO Go to step 10.
10. Apply a load with the VAT 40 untilthe baftery
v o l t a g e d r o p s t o b e t w e e n 1 2 1 3 . 5 V .
ls the amperage 87.5 A or more?
YES The charging system is OK.l
NO Repair or replace the alternator (see page 4-
29).a
( c o n t ' d )