Electrical
System
DODGE
Turbo Diesel
Engine
Electrical
System
Replacement
Procedures
Page
8-23
Preheat/Postheat
Cycle
- Check
Prepare
to
time
the Preheat
cycle
by watching the WAIT to
START
light or using a voltmeter or testlight at the manifold
heater terminals. Turn the ignition key to the ON position, but
do not
start
the engine.
Note:
The temperature in the intake manifold must be below
0°C [32°F] (for early electronic control modules before serial
number 0080000A) and 15°C [59°F] (for later electronic control
modules),
for preheat to occur.
If the engine has not been running and the ambient
temperature is
less
than 15°C [59°F], the WAIT to
START
light
will come on and the heater
solenoids
should activate
with
an
audible
CLICK.
|
BRAKE
® 0 [
f|IMS
S^^J
3IESEL
^
X
•WAIT TO
START
AWTI-J.OCK
"CLICK"
PL
Check
the voltage at both heater terminals. There should be
voltage at both terminals for the first 10 to 20
seconds
of
Preheat.
See the chart on a following page
(Normal
intake
heater operation) for the
sequence
of heater operation.
There
should no voltage at the
KSB
valve during the Preheat
cycle,
if the temperature Is
less
than 15°C [59°F].
If the engine has been running or the ambient temperature is
above 0°C [32°F] (for early electronic control modules before
serial
number 0080000A) or 15°C [59°F] (for later electronic
control modules), the heater
solenoids
and
Wait
to Start light
will not come on. There is no Preheat
cycle
above these
temperatures.
15*C=
59°F
INS
ESEL
IWATERJN
FUEL
|
1
W
4^
T
/
ST
1
RT
I
To Next Page
Loading...
