II-134
WSM Minor Change II Service Engineering Section
3-17 Auto glow control
The glow will be turned ON for an optimum time according to the temperature of engine cooling water.
3-17-1 Key-ON Processing
Water temperature: The glow-ON time is obtained from the glow time map (see Fig. 1, 2). The glow will not,
however, turn ON while the engine is working or the temperature is 81 C or over. The glow icon will appear
with the glow turned ON.
When the user confirms that the glow icon turns OFF and tries starting the engine, a delay in response (usu-
ally 0.5 to 1.5 seconds) will result, during which the temperature of the glow plug will drop. Therefore, the
actual glow will be kept turned ON for 2 seconds after the glow icon disappears. This will make a response
time lag between the display and glow time, thus making it possible to start the engine smoothly. (See Fig.
3.)
Fig.1.Cooling Water Temperature vs. Glow Time Fig.2.Graph of Water Temperature vs. Glow Time
Fig.3.Transition Diagram of Glow and Starter Key
Water
tempera-
ture ( °C)
Glow
time
(s)
Glow icon
display time
(s)
140 0.0 0.0
100 0.0 0.0
81 0.0 0.0
80 3.0 1.0
60 3.3 1.3
40 3.8 1.8
20 5.3 3.3
10 6.5 4.5
09.0 7.0
-10 11.0 9.0
-15 12.0 10.0
-40 12.0 10.0
ON
OFF
START
ON
OFF
ON
OFF
Glow completes
Glow continuing
Display
Starter switch
Glow output
(new)
Glow output
(conventional)
Glow output holding period
The glow plug is cooled down during this period.
Time
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