Other wise known as JTEC??? Dont ask me why. The PCM is under the hood
on 98.5 and up electronic controled Cummins motors. It is mounted to
the firewall near the passenger hood hinge, As input signals to the PCM
change the PCM adjustes its response to the output devices, The PCM
controls
charging system
speed control
transmission
air conditioning
APPS
CPS
Auto shut down (ASD)
Battery temp
Battery voltage
Brake switch
CCD+
CCD-
CPS
Data link port for scan tool
fuel level
Alternator output
Ignition
Output shaft speed
Overdrive if auto
Cruze control
Tranny temp auto
Tranny pressure auto
ABS braking
SO next time you have the high pressure washer fired up stay away from the PCM or it will bite you
Applys to all 98.5 and up Cummins.The intake air temp sensor is located
on the drivers side of the motor just above the lift pump and rearward
of the fuel filter on the intake manifold. The IAT sensor reads the
manifold air temp and sends a signal to the ECM to regulate intake ait
grid heaters,fuel timing,fuel control, As fuel to air temps vary the
sensors resistence changes the signal to the ECM. It has been my
experience that if an exhaust brake is used that the IAT can become
fouled with soot and the sensor becomes inaccurate, I personally clean
mine every 10k miles with carburator cleanor, this make the allmighty
Cummins happy and idles better as well as better overall performance
including MPG.
The map sensor found on all 98.5 and up Cummins equipted trucks is very
important as your fuel delivery rate is partially determined by the
MAP.The MAP sensor is located on the drivers side of the motor just
above the lift pump and rearward of the fuel filter side of the intake
manifold,Its just below the IAT sensor. The MAP sensor reads the
manifold air pressure and sends a signal to the ECM to regulate fuel
timing,fuel control, As air pressures vary the sensors resistence
changes the signal to the ECM. It has been my experience that if an
exhaust brake is used that the MAP can become fouled with soot and the
sensor becomes inaccurate, I personally clean mine every 10k miles with
carburator cleanor, The torque spec on the sensor is 10 ft. lbs.this
makes the allmighty Cummins happy and idles better as well as better
overall performance including MPG.
This article is a guide to assist in the install of a Fass II pump
for either the 98.5-02 (VP-44) models or the 03 and up (CP-3)
vintages.The instructions that come with the pump have good detail and
should be used as the main source of information or contact the vendor
that supplied you with the product for technical assistance.
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This article is a guide to assist in the install of a Fass II pump
for either the 98.5-02 (VP-44) models or the 03 and up (CP-3)
vintages.The instructions that come with the pump have good detail and
should be used as the main source of information or contact the vendor
that supplied you with the product for technical assistance.