Dodge D250 1990 - Page 392

Exhaust System and Intake Manifold
DODGETurbo Diesel
Air System
Page 11-11
Note: If the intake manifold air temperature is below -9°C mp)
[15°F] (early module before serial number 0080000A) 15°G
[59°F] (late module), the heater will preheat before the engine
starts. This will repeat until the intake manifold air temperature
increases to -S°C [15°F] (eariy module before serial number
0080000A) 15°C [59°F] (late module) each time the ignition key
is turned from the OFF to the ON position.
-59°F
Intake MmHoM Httter
Operation—Engine Intake
Manifold Temperature
Meat Cycle Time
Ignition Key ON
*More eiatk cycle
Padua* Cycfe
Occurrence
Ignition Key OH
•After entt cycle
Above 15°C [59°F1
0 Seconds
No
-9*Ct15*F] 10
15*C p9°F]
10 Seconds Yes
-18«C[0'F] to
-9
e
CI15«F]
15 Seconds
Yes
-2S
e
C[-1S°F]tO
17.5 Seconds
Yes
Below -2S*C
[-15'F1
20 Seconds
Yes
NOTE; The KSB valve activation voltage is independent of the intake
manifold healer control system. The KSB vaiw win be activated iny Um«
the manifold temperature is above T5»C 159*F1 and tr» Ignition *ey is In
the ON position.
After the preheat period, the "Walt to Start" light will go ]
off and not flash.
Set the multimeter scale to read DC-voltage.
Connect the multimeter lead to the intake manifold heater
terminals. Check each terminal individually.
INS
If voltage Is present, check the pull-in coil of the solenoids.
Check for voltage at the pulling coil of solenoid.
1. If voltage at pull-in coll replace electronic control module
2. If no voltage present at pull-in, replace solenoid