Toyota 3R-B 1969, Repair Manual

Page: 154 / 193

C H A R G I N G S Y S T E M - R eg u la to r . 8-15
the ammeter needle re g is te rs maxi­
mum .
Increase the alternator revolution, and
read the voltage at the time when the
ammeter needle re gisters one-half of
maximum amperage reading.
A ls o increase the revolution until it
reaches 3,000 rpm, and read the
v o ltag e.
T h e regulating voltage should be with­
in 13.8 ~ 14.8 volts at one-half of
maximum amperage at 3,000 rpm of
alternator revolution.
If the regulating voltage is not within
the specified voltage, adjust it by-
bending the adjusting arm of the volt­
age regulator.
F i g . 8-30 Voltage Regulator G0177
T e s t Circuit
Regulator Circuit T e s t
“ IG” te rm in a l “ N ” te rm in a l “ F ” te rm in a l
F ig . 8-31 Regulator Wiring G3456
H a rn e s s Connector Plug
1. Connect the circuit tester between
the "IG " and " F 11 terminals.
T h e resistance should be z e r o .
If there is any r e s is ta n c e , the con­
tact of the voltage regulator points
" P L 1 " and " P L o " is poor .
P r e s s down the armature of the
voltage regulator, and check the
re s ista n ce .
T h e resistance should be 2. 8 ohms
on the R S , R T 4 3 L , R T 5 2 L ,
R K1 71B s e r ie s , and on R K e x ­
cept on R K171B s e r ie s this must
be 11 ohms.
If the resistance is considerably
higher than the specified resistance
value, the control re s isto r is d e ­
fective .
2. Connect the circuit tester between
the »;f r i and " E 11 terminals.
T h e resistance should be z e r o .
If there is any resistance, the
contact of the voltage relay points
" P I " and " P o " is p o o r .
P r e s s down the armature of the
regulator r e l a y , and check the
re s ista n ce .
T h e resistance should be about
100 ohms.
If the resistance is considerably
higher than 100 ohms, the voltage
coil is opened.
If the resistance is extrem ely lo w ­
e r than the above, the voltage r e ­
lay points " P I 11 and " P o " a re
melted
o r the voltage coil is
sh orted.
3. Connect the circuit tester between
the " N " and " E " terminals.
T h e resistance should be about
23 ohms.
If the resistance is considerably
higher than 23 ohms, the voltage
relay Ooil is opened.
If the resistance is extremely lo w ­
e r than the above, the voltage
relay coil is shorted.
4. Connect the circuit tester between
the " L " and " B " terminals, and
p r e s s down the armature of the
voltage re la y , then check the r e ­
sistance .
T h e resistance should be z e r o .
If th e r e is any resistance, the
contact of the voltage relay points
" P o " and " P 2 'V i s p o o r .