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Charging System: 1J-5

No-Load Check

1) Run engine from idling up to 2000 rpm and read

meters.

NOTE

Turn off switches of all accessories (wiper,

heater etc.).

Specification for undercharged battery (No-load

check)

Current: 10 A

Voltage: 14.2 – 14.8 V (at 20 °C, 68 °F)

NOTE

Consideration should be taken that voltage

will differ somewhat with regulator case

temperature as shown in figure.

2) Using service wire, ground “C” terminal (1) of

generator.

3) Measure voltage between “B” terminal of generator

and body ground.

Voltage: 12.5 – 13.1 V (at 20 °C, 68 °F)

• If voltage is higher than standard value

If voltage is higher than standard value, check ground

of brushes.

If brushes are not grounded, replace IC regulator.

If voltage is lower than standard value, proceed to the

following check.

Load Check

1) Run engine at 2000 rpm and turn on head light and

heater motor.

2) Measure current and if it is less than 30 A repair or

replace generator.

Generator Test (Overcharged Battery Check)

S5JB0A1A04003

1) To determine battery condition, refer to “Battery

Description: ”.

2) If obvious overcharge condition exists as evidenced

by excessive spewing of electrolyte, measure

generator “B” terminal voltage at engine 2000 rpm.

3) If measured voltage is higher than upper limit value,

proceed to disassemble generator.

4) Check ground of brushes. If brushes are not

grounded, replace IC regulator. Then check field coil

for grounds and shorts, referring to “Generator

Inspection: ”.

[A]: Regulated voltage (V)

[B]: Heat sink temperature (°C)

16.0

15.5

14.3

15.2

14.8

14.2

13.3

14.6

15.0

14.5

14.0

13.5

13.0

-30 0 20

[A]

[B]

68 22

120 (˚C)

248 (˚F)

(V)

I5JB0A1A0006-02

I5JB0A1A0011-01