Isuzu 4HL1 Workshop Manual page 253

Symptom Diagnosis Chart 1 (1/2)
Check item
ECM
VIM
System voltage /Battery
Atmospheric pressure sensor
SCV
Pump assembly
FT sensor
Common rail pressure sensor
Common rail / flow damper /
pressure limiter
Injector
Fuel filter / pipe / tank
Fuel
Valve clearance
Valve timing
Compression
Ring gear
Rotary parts
CKP sensor
CMP sensor
Mechanical timing
Pump mount condition
ECT sensor
Glow relay
Glow plug
IAT sensor
Intake throttle system
Intake pipe, air cleaner
Poor startability
Symptom
C-9
C-9
C-1
C-7
C-2
D-10
A-2
A-1
D-14
C-3
D-4
D-12
D-1
D-11
D-2
D-6
D-10
D-8
D-8
D-9
D-9
A-2
B-7
D-3
A-2
C-4
D-5
Engine Control System 1A-251
Easy engine
Faulty idling
stall
LNW21AXF002401-X