1989-Montero · Система зарядки · страница 9 из 17 · Открыть оригинал PDF ↗
REGULATED VOLTAGE TEST
The purpose of this test is to check that the
electronic voltage regulator controls the voltage
correctly.
Preparation
(I) Prior to the test, check the following items and
correct if necessary.
(a) Check the battery installed on the vehicle
to see that it is fully charged. For battery
checking method, see “BATTERY”.
Turn the ignition switch to “OFF”.
Disconnect the battery ground cable.
Connect a digital voltmeter between the “S”
terminal of the alternator and ground. Connect
the (+) lead of the voltmeter to the “S”
terminal of the alternator, inserting from the
wire side of the two way connector and con-
nect the (-) lead to sound ground or battery
(-) terminal.
(b) Check the alternator drive belt tension. For
belt tension check, see “GROUP 7 - Ser-
vice Adjustment Procedures”.
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(5) Disconnect the alternator output wire from the
alternator “B” terminal.
(6) Connect a DC ammeter (0 to IOOA) in series
between the “B” terminal and the discon-
nected output wire. Connect the (+) lead of
the ammeter to the “B” terminal and connect
the (-) lead wire to the disconnected output
wire.
(7) Set the engine tachometer and connect the
battery ground cable.
Test
(1) Turn on the ignition switch and check that the
voltmeter indicates the following value.
Voltage: Battery voltage
If it reads OV there is an open circuit in the
wire between the alternator “S” terminal and
the battery (+) or the fusible link is blown.
(2) Start the engine. Keep all lights and accessor-
ies off.
(3) Run the engine at a speed of about 2,500 rpm
and read the voltmeter when the alternator
output current drops to IOA or less.
Result
(1) If the voltmeter reading agrees with the value
listed in the regulating voltage table below, the
voltage regulator is functioning correctly. If the
reading is other than the standard value, the
voltage regulator or the alternator is faulty.
Regulating voltage table
| Voltage regulator ambient temperature “C PF) | Regulating voltage | V |
|---|---|---|
| -20 (-4) | 14.2-15.4 | |
| 20 (66) | 13.9-14.9 | |
| 60 (140) | 13.4-14.6 | |
| 80 (176) | 13.1-14.5 |
Таблица в оригинале
(2) Upon completion of the test, set the engine
speed at idle and turn off the ignition switch.
(3) Disconnect the battery ground cable.
(4) Remove the test voltmeter and ammeter and
the engine tachometer.
(5) Connect the alternator output wire to the alter-
nator “B” terminal.
P-3) Connect the battery ground cable.
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