HOW DO YOU CHECK THE POWERTRAIN CONTROL MODULE ...

  • Tiny
  • Anonymous
  • 2001 Jaguar S-Type
  • 30,000 miles

How do you check the powertrain control module to see if it needs replacing

Friday, January 11th, 2013 AT 5:42 PM

1 Answer

  • Tiny
  • caradiodoc
  • Expert
  • 24,969 posts

You eliminate all the other possibilities. Engine Computers are normally the least suspect item but the first thing do-it-yourselfers jump on because they aren't doing what they're expected to do. Most troubleshooting procedures involve a diagnostic guide with pages of troubleshooting steps covering just one symptom or fault code that end with finding the break in a wire or replacing a defective sensor. Most of the time you need a scanner to command certain functions on and off to test the computer's ability to process incoming information and to act on it. When we read that someone replaced a bunch of parts including a computer, 95 percent of the time the computer didn't solve the problem and just added more variables to the problem. The exception is older GM vehicles. They did have a lot of computer trouble. Older mechanics who experienced those common failures assume today that's still a big problem so the first thing they want to try is the computer.

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Friday, January 11th, 2013 AT 8:49 PM

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