Isuzu engine 4j series. 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
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