3. When turning the key of the starter
switch (SA6) to the “І” position, the current
from the storage battery is passed through
KТ1 and K1 to the plugs А2. The pilot
lamp is lit steadily and, after expiration of
20 s, when the glow plugs will be warmed
up to the working temperature, the lamp will
be switched to the blinking mode signalling
on the readiness of the system to the start.
When turning the key of the switch (SA6) to
the “ІІ” position (СТ), the starter is switched
to start the engine. The starting pilot lamp
lights up to indicate that the starting
systems are faultless. If the lamp starts
blinking at the frequency of 1.5 Hz, the
change gear lever is not in the neutral
position or there Is a fault in the starting
interlock circuit. If the lamp blinks at the
frequency of 3.0 Hz, there is a fault in the
circuit of the phase winding of the
alternator. Eliminate the faults. After
starting the engine, the pilot lamp shall
become dim.
Checking the operability of the electric
torch pre-heater (Fig. 14)
If the electric torch pre-heater does not
operate, check the intactness of the ETPH
coil and solenoid valve winding by
connecting the test lamp to the terminals
"+" of the storage battery and to the ETPH
terminals in turn:
а) to the terminals "М5" (coil): the lamp
shall light up. If not so, the coil has burned
out;
b) to the terminals "М6" (valve winding): the
lamp shall be lit dimly.
If the lamp is lit brightly, there is a short
circuit in the winding. If the lamp is not lit,
the winding is broken.
ATTENTION: If the starter operates
when setting the switch (SА15) to the ON
position, the connection of the coil or
winding of the ETPH valve is lost. As a
result, the current from the switch (SA15)
is passed through the coil and ETPH
winding to the terminal “CT” of the starter
switch (SA6) via solenoid valve control
circuit and further – to the starter-
energizing circuit.
Replace the ETPH.
Diagnostics of faults in the circuits
controlling the glow plugs А 2
1. If the test lamp in the left pilot lamp unit
on the instrumentation dashboard after
starting the engine is blinking, the relay glow
plug (KЗ) is faulty (sticking of the relay
contacts).
2. If the test lamp blinks when turning the
key of the starter switch (SA6) to the “І”
position, there is an open circuit between the
glow plugs (А2) and the relay (K1).
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