2004 ISUZU TF SERIES Workshop Manual

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Page 1129 of 4264

ISUZU TF SERIES 2004 Workshop Manual TROUBLESHOOTING 6 – 9
6. Overheating
Step Action Value(s) Yes No
1 Was the engine coolant level OK? —
Go to Step 2 Replenish the
coolant
2 Was the water leakage or the radiator restricti

Page 1130 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6 – 10 TROUBLESHOOTING
8. Dark Exhaust Smoke
Step Action Value(s) Yes No
1 Was the air cleaner element normal condition? —
Go to Step 2 Clean or
replace the air
cleaner
element
2 Was t

Page 1131 of 4264

ISUZU TF SERIES 2004 Workshop Manual TROUBLESHOOTING 6 – 11
9. Oil Pressure Does Not Rise
Step Action Value(s) Yes No
1 Was the oil pressure warning lamp working OK? —
Go to Step 2 Replace the oil
pressure
warning lamp
2 D

Page 1132 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6 – 12 TROUBLESHOOTING
10. Abnormal Engine Noise
10–1 Engine knocking
Step Action Value(s) Yes No
1 Was the injection nozzle pressure or injection spray
pattern OK? —
Go to Step 2 Repla

Page 1133 of 4264

ISUZU TF SERIES 2004 Workshop Manual TROUBLESHOOTING 6 – 13
10–3 Continuous noise
Step Action Value(s) Yes No
1 Was the fan belt tension OK? 9 – 13 mm
(0.35 – 0.51
in)
Go to Step 2 Adjust the fan
belt tension.
2 Was

Page 1134 of 4264

ISUZU TF SERIES 2004 Workshop Manual 6 – 14 TROUBLESHOOTING
10-5 Excessive turbocharger noise
The vibration noise (the air aspiration noise) occurred when turbocharger rotates, it is normal condition of the
turbocharger, no necessa

6 – 14 TROUBLESHOOTING
10-5 Excessive turbocharger noise
The vibration noise (the air aspiration noise) occurred when turbocharger rotates, it is normal condition of the
turbocharger, no necessary any actions.
Step Action Value(s) Yes No
1 Was the excessive noise coming from the
turbocharger? —
Go to Step 2 Go to Step 10
2 Inspect the fixing bolts and bands.
Was any problem found? — Tighten the
loose parts Go to Step 3
3 Was the intake or exhaust system gasket damaged?— Replace the
damaged
gasket. Go to Step 4
4 Inspect rotation parts condition.
Was the turbine wheel rotation rough? — Replace the
turbocharger. Go to Step 5
5 Inspect the turbine wheel.
Was the turbine wheel rubbing against housing? — Replace the
turbocharger. Go to Step 6
6 Was the turbine wheel damaged? — Replace the
turbocharger. Go to Step 7
7 Were there carbon deposits in the turbine or
compressor housing? — Clean or
replace the
turbocharger. Go to Step 8
8 Inspect the oil supply condition.
Was the oil feed pipe clogged? — Repair or
replace the oil
feed pipe. Go to Step 9
9 Was the turbine shaft bearing worn? — Replace the
turbocharger. Go to Step 10
10 Are any DTC stored? — Go to indicated
DTC Solved

11. Rotating Part Wear of Turbocharger
Step Action Value(s) Yes No
1 Inspect engine oil.
Was it contaminated with foreign materials? — Replace the
engine oil Go to Step 2
2 Was the recommended engine oil grade/viscosity
being used? API CD or
ISUZU
genuine/
10W–30
Go to Step 3 Replace the
engine oil
3 Was the oil feed pipe restricted? — Clean or
replace the oil
feed pipe Go to Step 4
4 Was the oil seal of turbocharger defective? — Replace the oil
seal Go to Step 5
5 Was the center housing oil drain passage clogged? — Clean center
housing or
replace the
turbocharger Go to Step 6
6 Was there oil sludge and/or coking on the turbine
shaft? — Replace the
turbocharger Go to Step 7
7 Are any DTC stored? — Go to indicated
DTC Solved

Page 1135 of 4264

ISUZU TF SERIES 2004 Workshop Manual 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 t

Page 1136 of 4264

ISUZU TF SERIES 2004 Workshop Manual 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.
Th

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