Isuzu Trooper (1998-2002 year). Manual - part 582

6D – 2 ENGINE ELECTRICAL

b. VOLTAGE IS ABOVE 16V AT ABOVE 1/3 OF

AMPERAGE RATE – Drop charging voltage to
15V and charge for 10 – 15 hours.
Then go to Step 5.

c. VOLTAGE IS BETWEEN 12V AND 16V –

Continue charging at the same rate for an
additional 3-1/2 hours. Then go to Step 5.

d. VOLTAGE IS BELOW 12V – Replace battery.

5. LOAD TEST (Step 5)

(1) Connect a voltmeter and a battery load tester

across the battery terminals.

(2) Apply 300 ampere load for 15 seconds to remove

surface charge from the battery.
Remove load.

(3) Wait 15 seconds to let battery recover. Then apply

specified load from specifications (See Main Data
and Specifications in this section).
Read voltage after 15 seconds, then remove load.
a. VOLTAGE DOES NOT DROP BELOW THE

MINIMUM LISTED IN FOLLOWING TABLE –
The battery is good and should be returned to
service.

b. VOLTAGE IS LESS THAN MINIMUM LISTED –

Replace battery.

ESTIMATED

TEMPERATURE

MINIMUM

°F

°C

VOLTAGE

70

21

9.6

60

16

9.5

50

10

9.4

40

4

9.3

30

–1

9.1

20

–7

8.9

10

–12

8.7

0

–18

8.5

The battery temperature must be estimated by feel
and by the temperature the battery has been
exposed to for the preceding few hours.

ENGINE ELECTRICAL 6D – 3

ON-VEHICLE SERVICE

BATTERY CHARGING

Observe the following safety precautions when
charging the battery:

1. Never attempt to charge the battery when the fluid

level is below the lower level line on the side of the
battery. In this case, the battery must be replaced.

2. Pay close attention to the battery during the

charging procedure.
Battery charging should be discontinued or the rate
of charge reduced if the battery feels hot to the
touch.
Battery charging should be discontinued or the rate
of charge reduced if the battery begins to gas or
spew electrolyte from the vent holes.

3. In order to more easily view the hydrometer blue

dot or ring, it may be necessary to jiggle or tilt the
battery.

4. Battery temperature can have a great effect on

battery charging capacity.

5. The sealed battery used on this vehicle may be

either quick-charged or slow-charged in the same
manner as other batteries.
Whichever method you decide to use, be sure that
you completely charge the battery. Never partially
charge the battery.

JUMP STARTING

JUMP STARTING WITH AN AUXILIARY
(BOOSTER) BATTERY

CAUTION: Never push or tow the vehicle in an
attempt to start it. Serious damage to the emission
system as well as other vehicle parts will result.

Treat both the discharged battery and the booster
battery with great care when using jumper cables.
Carefully follow the jump starting procedure, being
careful at all times to avoid sparking.

WARNING: Failure to carefully follow the jump
starting procedure could result in the following:

1. Serious personal injury, particularly to your

eyes.

2. Property damage from a battery explosion,

battery acid, or an electrical fire.

3. Damage to the electronic components of one or

both vehicles.

Never expose the battery to an open flame or electrical
spark. Gas generated by the battery may catch fire or
explode. Remove any rings, watches, or other jewelry
before working around the battery. Protect your eyes by
wearing an approved set of goggles.
Never allow battery fluid to come in contact with your
eyes or skin.
Never allow battery fluid to come in contact with fabrics
or painted surfaces.
Battery fluid is a highly corrosive acid.

Should battery fluid come in contact with your eyes,
skin, fabric, or a painted surface, immediately and
thoroughly rinse the affected area with clean tap water.
Never allow metal tools or jumper cables to come in
contact with the positive battery terminal, or any other
metal surface of the vehicle. This will protect against a
short circuit.
Always keep batteries out of the reach of young
children.

JUMP STARTING PROCEDURE

1. Set the vehicle parking brake.

If the vehicle is equipped with an automatic
transmission, place the selector lever in the “PARK”
position.
If the vehicle is equipped with a manual
transmission place the shift lever in the “NEUTRAL”
position.
Turn “OFF” the ignition.
Turn “OFF”  all lights and any other accessory
requiring electrical power.

2. Look at the built-in hydrometer.

If the indication area of the built-in hydrometer is
completely clear, do not try to jump start.

3. Attach the end of one jumper cable to the positive

terminal of the booster battery.
Attach the other end of the same cable to the
positive terminal of the discharged battery.
Do not allow the vehicles to touch each other.
This will cause a ground connection, effectively
neutralizing the charging procedure.
Be sure that the booster battery has a 12 volt rating.

4. Attach one end of the remaining cable to the

negative terminal of the booster battery.
Attach the other end of the same cable to a solid
engine ground (such as the A/C compressor
bracket or the generator mounting bracket) of the
vehicle with the discharged battery.
This ground connection must be at least 450 mm
(18 in) from the battery of the vehicle whose battery
is being charged.

WARNING: Never attach the end of the jumper
cable directly to the negative terminal of the dead
battery.

5. Start the engine of the vehicle with the good battery.

Make sure that all unnecessary electrical
accessories have been turned “OFF”.

6. Start the engine of the vehicle with the dead battery.
7. To remove the jumper cables, follow the above

directions in the reverse order.
Be sure to first disconnect the negative cable from
the vehicle with the discharged battery.

6D – 4 ENGINE ELECTRICAL

REMOVAL AND INSTALLATION OF THE
BATTERY

REMOVAL

1. Negative cable
2. Positive cable
3. Retainer screw and rods
4. Retainer
5. Battery

INSTALLATION

To install the battery, follow the removal procedure in
the reverse order, noting the following points:

1. Make sure that the rod is hooked on the body side.

065RW029

MAIN DATA AND SPECIFICATIONS

Model (JIS)

80D26R–MF

75D26R–MF

Voltage (V)

12

12

Cold-Cranking Performance (Amp)

582

490

Reserve Capacity (Min)

133

123

Load Test (Amp)

300

300

Fast Charge Maximum Amperage (Amp)

6.5

6.5

ENGINE ELECTRICAL 6D – 5

STARTING SYTEM

GENERAL DESCRIPTION

STARTING CIRCUIT

The cranking system consists of a battery, starter, 

starter switch, starter relay, etc. and these main
components are connected as shown in the illustration.

“S”

“B”

“M”

Battery

5

4

3

2

IG1

ST

B2
B1

1

7

6

P

N

N

Legend

(1)

Inhibitor Switch

(2)

Starter Switch

(3)

Battery

(4)

Magnetic Switch

(5)

Pinion Clutch

(6)

Starter Motor

(7)

Starter Relay

065RW039

STARTER

The starting system employs a magnetic type reduction
starter in which the motor shaft is also used as a pinion
shaft. When the starter switch is turned on, the contacts
of the magnetic switch are closed, and the armature
rotates. At the same time, the plunger is activated, and
the pinion is pushed forward by the shift lever to mesh
with ring gear.

Then, the ring gear runs to start the engine. When the
engine starts and the starter switch is turned off, the
plunger returns, the pinion is disengaged from the ring
gear, and the armature stops rotation. When the engine
speed is higher than the pinion, the pinion idles, so that
the armature is not driven.