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ELECTRICALS
40
Fig. 49
GLOWPLUGTIMER
1 5
3
4
2
7
6
(
0
C) TEMP
-30
30
40
200
-20
23
33
200
-10
17
27
200
0
10
20
200
10
8
18
200
20
6
16
200
30
4
14
120
40
4
14
90
50
4
14
60
60
4
14
30
70
4
14
15
80
4
14
0
TIME IN SECONDS
PRE GLOW
SAFETY SHUT OFF
POST GLOW
Table 1 :
17G. GLOW PLUG TIMER (FOR 4DL TCIC)
Function
It provides electrical supply to glow plugs for controlled
period according to ambient temperature.
Location
It is located on the firewall inside the engine
compartment.
Connection details Fig. 49
Operating sequence
a. ‘IG’ contact ‘ON’- indicator lamp burns upto
duration as decided by zone control, lamp
extinguishes as shown in table 1. Glow plug
continues to remain ‘ON’ even after lamp has
extinguished, engine should be started by making
‘ST’ contact ‘ON’. If engine is hot, ‘ST’ contact may
be made ‘ON’ without waiting for indicator lamp
to extinguish. However, if ‘ST’ contact is not made
‘ON’, the glow plug supply is switched after a
period as shown in the table 1. This is a safety
feature.
b. ‘ST’ contact ‘ON’ - with ‘IG ON’, glow plugs continue
to remain ‘ON’ while engine is cranked.
Perfomance Check :
1.
Lamp on time
As per table
2.
Safety shut Off time
As per table
3.
Post glow time
As per table
4.
Over voltage protection
14.5 + 0.5
5.
Lampoutput andglowplugoutput are
short circuit protected.