Diesel Electrical System Diagnosis; Engine Does Not Start Cold; Pre-Heating System (Super Glow Type) - Toyota 3b Repair Manual

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ENGINE MECHANICAL
-
Diesel Electrical System Diagnosis
[38]
EM-13
DTESEL ELECTRTCAL
SYSTEM D|AGNOSTS [3B]
ENGINE DOES NOT START COLD
HINT:
1
.
Battery voltage at least 12 volts lor 24 volts)
-
ignition switch
OFF.
2.
Engine cranks normally.
3.
Fusbible link okay.
4.
Check the voltage marked
with
an asterisk
(*)just
as
the ignition switch is placed
at
ON
because
the voltage will change with
elapse
of time.
1
.
Pre-heating System lSuper Glow Type]
No
Fuse
Blown
Fuse OK
Bulb
No Good
Bulb OK
No Voltage
Voltage
Pre-heating Timer
654 3
1
Check ENGINE
(BJ)or
GAUGE (BB)fuse.
Check
for short
circuit and repair
if
necessary.
Check
if
indicator light lights
up
with
ignition switch
ON.
Coolant
temp. Approx. 2OoC (680F):
Approx. 2
seconds
Check
indicator light
bulb.
Check
for
battery voltage to
terminal
3 of
pre-heating timer
connector
(on wire
harness
side).
lf
okay,
pre-heating timer
is
faulty
and
should
be replaced.
Check
that is
1
V between
terminals
9 and 6.
lf
faulty,
repair
glow plug.
lf
okay,
timer
is
faulty
and
should
be
replaced.
*
Check
for
battery voltage to terminal
1
of pre-heating timer with
ignition
switch
ON.
Start the engine and check,/if there is
a
voltage at terminal 9
of
pre-heating timer.
lf faulty, repair charging system as necessary.
lf
okay,
timer
is
faulty
and should be replaced.
Check if voltage to
terminal
1
of
pre-
heating
timer
is
terminated after
engine
is started.
9
CONTINUED ON
PAGE EM-14