Isuzu engine 4j series. Service manual - part 5

SERVICE INFORMATION  00 – 19

MAGNETIC SWITCH CONTACTS ARE
FUSED AND NOT MOVED, OR A
RETURN SPRING IS BROKEN OR
DETERIORATED

NO

STARTER DOES NOT STOP THOUGH STARTER
SWITCH IS RETURNED TO “ON” FROM “START”

REPLACE STARTER SWITCH

DISCONNECTED STARTER SWITCH WIRING CONNECTOR, AND CHECK STARTER SWITCH OPERATION.

KEY
POSITION

BATTERY

B1

IGNITION

IG1

BATTERY

B2

ACCESSORIES

ACC

IGNITION

IG2

STARTER

ST

LOCK
OFF
ACC
ON
START

THERE MUST BE NO CONTINUITY EXCEPT ABOVE LINES.

YES

REPLACE MAGNETIC SWITCH

00 – 20

  SERVICE INFORMATION

13. TURBOCHARGER

1) ENGINE HAS LESS THAN NORMAL POWER

Checkpoint

Trouble Cause

Countermeasure

Air cleaner

Restricted

Clean or replace

Intake pipe and hose

Restricted

Clean or replace

Compressor/Intake manifold

Loose (Leaking)

Repair

Exhaust manifold/turbine inlet

Loose (Leaking)

Repair

Exhaust piping and silencers

Restricted

Clean or replace

Air breather

Restricted

Clean or replace

Boost compensator

(Injection pump)

Defective

Repair or replace

Continued on the next page

OK

OK

OK

OK

OK

OK

OK

NG

NG

NG

NG

NG

NG

NG

SERVICE INFORMATION  00 – 21

Checkpoint

Trouble Cause

Countermeasure

Compressor wheel

Impact damage

Replace

Turbine wheel

Impact damage

Replace

Carbon build-up

Replace

Rotating assembly

Dragging or seized

Replace

Continued from the previous page

OK

OK

OK

NG

NG

NG

NG

OK

00 – 22

  SERVICE INFORMATION

2) BLUE OR BLACK SMOKE

Checkpoint

Trouble Cause

Countermeasure

Air cleaner or intercooler

Restricted

Clean, repair, or replace

Turbocharger oil seal

Leakage

Replace

Turbocharger oil drain pipe

Restricted

Repair or replace

Air breather

Restricted

Clean

Boost compensator

(Injection pump)

Defective

Repair or replace

Compressor wheel

Impact damage

Replace

Turbine wheel

Impact damage

Replace

Continued on the next page

OK

OK

OK

OK

OK

OK

OK

NG

NG

NG

NG

NG

NG

NG