Isuzu KB P190. Manual — part 200

TROUBLESHOOTING 6 – 15

12. Oil Leakage from Turbocharger

Step Action Value(s)

Yes

No

1

Inspect the oil leakage area.
Was the oil feed pipe eye bolt loose or the gasket
broken?

—

Tighten the eye

bolt or replace

the gasket.

Go to Step 2

2

Were the V band fixing faces tight?

—

Tighten band or

replace the

turbocharger Go

to

Step 3

3

Was there oil leakage from the flange of the turbine
housing?

—

Replace

the

turbocharger Go

to

Step 4

4

Was there oil leakage from the flange of compressor
housing?

—

Tighten the bolt

and/or hose

clamp. Go

to

Step 5

5

Are any DTC stored?

—

Go

to

indicated

DTC Solved

13. Insufficient Acceleration and/or Lack of Power due to turbocharger

Step Action Value(s)

Yes

No

1

Inspect the air or exhaust route.
Was the air and/or exhaust gas piping loose?

—

Tighten

flange

bolts or hose

clamp. Go

to

Step 2

2

Inspect the work of waste gate valve control.
Was there rust on the linkage rod or pin of the waste
gate valve?

—

Replace the

turbocharger Go

to

Step 3

3

Was air leakage found from the actuator piping?

—

Repair

or

replace the

actuator pipe or

hose/ Go

to

Step 4

4

Inspect the inside of the turbocharger.
Was the turbine shaft end nut loose?

—

Replace

the

turbocharger Go

to

Step 5

5

Were the turbine blades bent?

—

Replace

the

turbocharger Go

to

Step 6

6

Was the turbine wheel rubbing against housing?

—

Replace

the

turbocharger Go

to

Step 7

7

Are any DTC stored?

—

Go

to

indicated

DTC Solved

6 – 16 TROUBLESHOOTING

14. Battery Charging and Noise Problem

Visual/physical check the following items before diagnosis.
The drive belt tension.
The battery terminals connection condition.
The ground connection condition.
The generator and the battery fastener condition.
The battery fluid level and specific gravity.
14-1 Battery No Charging

Step Action Value(s)

Yes

No

1 Was

“

Visual/Physical Check" performed.

—

Go to Step 2

Go to

visual/physical

check

2

Inspect the brush contact condition on the generator.
Was there poor contact between the brush and the
slip ring?

—

Repair

or

replace the

brush and/or

the slip ring.

Go to Step 3

3

Inspect the stator coil on the generator.
Was there an open circuit or the scorching on the
stator coil?

—

Replace the

stator coil.

Go to Step 4

4

Inspect the rotor coil on the generator.
Was there an open circuit or the scorching on the
rotor coil?

—

Replace the

rotor coil.

Go to Step 5

5

Inspect the rectifier on the generator.
Was the rectifier defective?

—

Replace

the

rectifier Go

to

Step 6

6

Inspect the IC regulator.
Was the IC regulator defective?

—

Replace the IC

regulator. Go

to

Step 7

7

Are any DTC stored?

—

Go

to

indicated

DTC. Solved

14-2 Battery Overcharging

Step Action Value(s)

Yes

No

1 Was

“

Visual/Physical Check" performed.

—

Go to Step 2

Go to

visual/physical

check

2

Inspect the terminal circuit.
Were the B and F terminals shorted?

—

Repair

the

short circuit.

Go to Step 3

3

Check the regulating voltage.
Was the IC regulator voltage excessive?

—

Replace the IC

regulator. Go

to

Step 4

4

Are any DTC stored?

—

Go

to

indicated

DTC. Solved

TROUBLESHOOTING 6 – 17

14-3 Battery Under Charging

Step Action Value(s)

Yes

No

1 Was

“

Visual/Physical Check" performed.

—

Go to Step 2

Go to

visual/physical

check

2

Inspect the brush contact condition on the generator.
Was there intermittent contact between the brush
and the slip ring?

—

Repair

or

replace the

brush holder

assembly. Go

to

Step 3

3

Inspect the rotor coil on the generator.
Was there a short circuit in the rotor coil?

—

Repair

or

replace the

rotor coil.

Go to Step 4

4

Inspect the stator coil on the generator.
Was there an open circuit or the short circuit on the
stator coil?

—

Repair

or

replace the

stator coil.

Go to Step 5

5

Inspect the rectifier on the generator.
Was the rectifier defective?

—

Replace

the

rectifier Go

to

Step 6

6

Inspect the IC regulator on the generator.
Was the IC regulator defective?

—

Replace the IC

regulator. Go

to

Step 7

7

Was the electrical load excessive?

—

Replace

more

higher capacity

generator. Go

to

Step 8

8

Are any DTC stored?

—

Go

to

indicated

DTC. Solved

14-4 Battery Unstable Charging Current

Step Action Value(s)

Yes

No

1 Was

“

Visual/Physical Check" performed.

—

Go to Step 2

Go to

visual/physical

check

2

Inspect the brush contact condition on the generator.
Was there poor contact between the brush and the
slip ring?

—

Repair

or

replace the

brush and/or

the slip ring.

Go to Step 3

3

Inspect the rotor coil on the generator.
Was there the short circuit or an open circuit in the
rotor coil?

—

Repair

or

replace the

rotor coil.

Go to Step 4

4

Inspect the stator coil on the generator.
Was there an open circuit or the short circuit in the
stator coil?

—

Repair

or

replace the

stator coil.

Go to Step 5

5

Inspect the connection between the rectifier and
stator coil on the generator.
Was there a loose connection between the rectifier
and stator coil ?

—

Repair the

loose

connection. Go

to

Step 6

6

Inspect the IC regulator on the generator.
Was the IC regulator defective?

—

Replace the IC

regulator. Go

to

Step 7

7

Are any DTC stored?

—

Go

to

indicated

DTC. Solved

6 – 18 TROUBLESHOOTING

14-5 Charging System Noise

Step Action Value(s)

Yes

No

1 Was

“

Visual/Physical Check" performed.

—

Go to Step 2

Go to

visual/physical

check

2

Was there intermittent noise or continuous noise and
that could be identified clearly by increasing and
decreasing engine speed?

—

Replace the

bearing. Go

to

Step 3

3

Was there a growling sound and does this sound
stop when the connector was disconnected?

—

Replace

the

stator coil.

Go to Step 4

4

Was intermittent sound heard when the generator
was running?

—

Replace

the

brush and/or

slip ring.

Go to Step 5

5

Was frictional sound heard when generator was
running?

—

Clean the slip

ring or replace

the brush.

Go to Step 6

6

Are any DTC stored?

—

Go

to

indicated

DTC. Solved