Isuzu AU-4LE1T, Maintenance Manual

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39
(2) Pre-heating Procedures
As an engine starting aid, pre-heating is required in a cold engine
starting.
The type with QOS system:
This pre-heating uses "QOS," a quick pre-heating system which
automatically controls pre-heating time utilizing coolant temperature to
conduct the irreducible minimum of pre-heating.
1) Turn the key to the DRIVE position, and the glow plugs built in the
engine will grow red-hot to pre-heat the engine. At this time the
pre-heating indicator lamp on the meterboard is actuated.
2) When the pre-heating indicator lamp goes out, try starting the engine at
once.
Relationship between water temperature and pre-heating time (For
ref.)
20
°
C (68
°
F) ········· About 0.5 sec.
5
°
C (35
°
F) ··········· About 1.5 sec.
0
°
C (32
°
F) ··········· About 2 sec.
-15
°
C (5
°
F) ·········· About 6.3 sec.
The type with a control resistance
1) Turn the starter switch key counter-clockwise to PRE-HEAT position in
order to heat the glow plugs on the engine.
The Pre-heating time of 5 seconds is required until the control
resistance coil becomes red.
2) Turn the starter switch key clockwise to START position as soon as the
control resistance coil red heat.