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Repair Topics / PCM
- Power Train Control Module
PCM - Power Train Control Module This
category contains featured questions as
examples. They relate to most vehicles.
Question: 2005 Ford Freestar mileage: 72,200.
Fault code 0386 is active. "Crankshaft
position sensor B circuit range/performance”
I have done the following with no luck. 1.
Installed a new CKP sensor. 2. Checked the
two wires from the CKP to the ICM. 3. I
check the output voltage to the sensor and
according to my Haynes manual; I should have
measured battery voltage at the CKP sensor
with the key ON. I only got 1.5 volts. 4. I
check power and ground to the ECM -- checked
OK. 5. I then replaced the ECM with one from
a junkyard. 6. The problem is fault code 386
keeps coming up and I still only measure 1.5
volts at the CKP sensor. The engine still
runs rough and if I erase the fault code it
will return with in 1/2 mile of driving. If
I erase it when I am driving it pops right
back up. Am I missing something, is my new
ECM bad or is the book wrong. Thanks,Answer: 1.5 It sounds like you may have
a circuit shorted to ground. Recheck the
wires that go to the CKP sensor to test the
ohm's to ground. If you have any reading to
ground the computer thinks the sensor is
shorted. Repair wiring as needed to repair
problem.
Question: 2001 GMC Yukon mileage:
47,000. What type of chip is required, and recommended
for my truck?
Answer: We commend the factory computer
chip for stock applications.
Question: 2001 Ford Taurus, miles: 94,000. Can
you give me any information on the brain in the
dashboard? Like how to put it back together. It has been
at a garage for four months. They said it was the brain
and would cost over 800.00 dollars to fix. I don't have
that kind of money. Any information would be greatly
appreciated.
Answer: Are you sure there is something wrong
with the "brain" (power control module - PCM) -- it
usually does not go bad. Most likely one of the
components that feed the PCM or that the PCM controls is
malfunctioning. Scan for trouble codes to replace
shorted sensor as needed.
Question: 1999 Olds Cutlass Cierra Brough 3.8L
mileage: 200,000. My problem is the EMC fuse keeps
blowing; sometimes it may last 5 minutes and then other
times it may blow with the switch being turned on the
crank mode. Do you have any suggestion that may help me?
Answer: Check the wiring loom for damage or
to see if it is shorted out. In addition, you may
possibly have a bad PCM (power control module), which is
the same thing as an ECM.
Question: 2002 Toyota Avalon. mileage:
84,000. Car is hard to keep running. When checked on
scanner it shows that injector drivers 1 and 2 bad. I
replaced the PCM but still shows same problem.
Answer: When you replaced the PCM you
should also replace the fuel injectors related to that
circuit.
Repair Topics / PCM
- Power Train Control Module
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