Simple Engine Troubleshooting - Isuzu AU-4LE1T Maintenance Manual

8.

SIMPLE ENGINE TROUBLESHOOTING

This section contents simple troubleshooting. Refer this section in case of engine failure.
If the cause can not be identified or if it is hard to correct, contact ISUZU dealer as soon as possible.
The items marked with in Action
" " " "
Symptom
Battery discharged.
Imperfect cable connections.
Starter does
not turn.
Starter or starter switch failure.
Safety relay failure.
Engine stop solenoid return failure.
No fuel in the fuel tank.
Engine does
not start. Clogged fuel filter element.
Starter turns
but engine
Air in the fuel system.
dose not
ignite. Control rack is stuck at no fuel position.
Unproper preheating operation.
Glow plug malfunction.
Incorrect injection timing.
Low cylinder compression pressure.
Air in the fuel system.
Engine ignite but stall
Improper low idling speed adjustment.
immediately.
EGR valve fixing. (Open position.)
102
are necessary to be repaired or adjusted. Contact ISUZU dealer.
Cause
Charge or change.
Make sure that there is no fuel leakage and
replenish.
Remove water and change element.
Bleed air.
Bleed air.
Action