Pajero II Workshop Manual 1991 · Электрооборудование двигателя · страница 10 из 54 · Открыть оригинал PDF ↗

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(6) Connecta tachometer (For the procedure for
connectingthe tachometer;refertoGROUP
11Service Adjustment Procedures
Connect the negative battery cable
(8)Leave the hood open.

(9)Check to be sure that the reading on the voltme-
ter is equal to the battery voltage_
NOTE

Ifthe voltage is 0 V, the cause is probably an open
circuit in the wire or fusible Iink between the al
ternatorBterminal and the battery (+) termi-
nal:

(1O)After turning the light switch on ad turning on
the headlamps, start the engine

(11) lmmediately after setting the headlamps to high
beam and turning the heater blower switch to
the high revolution position, increase the engine
speed to 2,500 r/min. and read the maximum cur -
rent output value displayed on the ammeter:
Limit value: 70% of normal current output

NOTE

For the nominal current output, refer to the
Alternator Specifications_

Because thecurrent from the battery will
soonthe
dropafter the engine is started,
above step should be carried out as quickly as
possible in order to obtain the maximum cur-
rent output value.

The current output value will depend on the
electrical load and the temperature of the al-
ternator body:

If the electrical load is small while testing, the
specified level of current may not be output
even though the alternator is normal. In such
cases, increase the electrical load by leaving
the headlamps turnedon for some time to
discharge the battery or byusingthe lighting
systeminanother vehicle,andthentest
again.

The specified level of current also may not be
output if the temperature of the alternator
body or the ambient temperature is too high
In such cases, cool the alternator and then
test again:

(12) The reading on the ammeter should be above the
limit value. If the reading is below the limit value
and the alternator output wire is normal, remove
the alternator from the engine and check the al
ternator

(13)Run the engine at idle speed after the test.

(14) Turn the ignition switch to the OFF position_

(15)Disconnect the negative battery cable.

(16)Disconnect the ammeter; voltmeter and tachom-
eter;

(17)Connect the alternator output wire to the alterna-
torBterminal:

(18)Connect the negative battery cable_

REGULATED VOLTAGE TEST

This test determines whether the voltage regulator is
correctly controlling the alternator output voltage.
(1) Always be sure to check the following before the
test

Alternator installation

Check to be sure that the battery installed in the
vehicle is fully charged (Refer to GROUP 54
Battery )

Alternator drive belt tension (Refer to GROUP
11 _ Service Adjustment Procedures )
Fusible link

Abnormal noise from the alternator while the
engine is running

2)Turn the ignition switch to the OFF position:
Disconnect the negative battery cable

<Battery-voltage sensing type

Use the special tool (alternator harness connector
MD998467)to connect the alternator "S'ter-
minaltotheearth:(Usethespecialtoolto
connect the (+) lead of the voltmeter t0 the "S"
terminal,and then connect the (~) lead of the
voltmeter t0 an earth )

<Alternator generation-voltage sensing type >

Connect the alternator'L" terminal to the earth:
(Connect the (+) lead of the voltmeter to the'L"
terminal,and then connect the (~ ) lead of the
voltmeter t0 an earth )

(4) Connect the digital-type voltmeter.

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