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Engine Electrical System
Page 8-22
Replacement Procedures
Electrical System
DODGE Turbo Diesel
Thermistor - Check
Remove the electrical connector from the thermistor. Prepare
to time the Preheat cycle by watching the WAIT to START light.
Turn the ignition key to the ON position, but do not start the
engine.
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The WAIT to START light will come on and the heater solenoids
should CLICK on.
Note: There should be no voltage at the KSB valve if the intake
manifold temperature is less than 15°C [59°F].
20
Seconds
"CLICK"
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J The WAIT to START light should stay on (Preheat Cycle On) for
20 seconds. After 20 seconds, the WAIT to START light should
go off and the heater solenoids should CLICK off.
After 20 seconds the WAiT to START light should start flashing.
This is an indication that the thermistor circuit is open (because
it is unplugged).
The KSB valve should have voltage at the valve terminal if the
intake manifold has heated to 15°C [59°F] or above.
Turn the key to the off position. Plug the wiring connector back
onto the thermistor.
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Troubleshooting
