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Cardoc Iii

Beaver, PA

I've been a professional mechanic/technican since the late '70s and now I own my shop and specialize in electronics and computer control diagnostics on American and most Asian vehicles. I supplement my own training and even my shop by traveling around the country as a continuing educational instructor. My image is a compression test on a Volvo S40 using a pressure transducer and it shows the exhaust camshaft incorrectly over advanced. Check out my blog, "Autotechtitude" at http://johng673.blogspot.com/ In my blog I'll take you inside the world of today's diagnostic technician and you will see the tools, strategies, triumphs, and of course some of the lessons that are learned the hard way that every technician experiences.


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Question Answered: 

When the TPMS light flashes it means the system is down. Usually it is a bad wheel sensor. If you do the retrain routine you might find one (or more) wheel(s) doesn't get the horn to blow. That would identify a sensor that isn't reporting. If you do have a bad sensor the tire will need broken down to replace it.


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Question Answered: 

I usually expect to see a 1999 pass with two monitors not ready as the cut-point to one monitor incomplete is 2000. Even so, the progressive nature of OBDII causes certain tests to be blocked from running until the correct conditions are achieved. Things like getting the engine to full operating temperature and be driven at speed for a given period of time come into play and are part of the drive cycle that has to get completed. One of the strategies to solving this issue is to take one of the tests that isn't completing, such as the O2 sensors. Look at what trouble codes could be set if the test failed and you will find the code enabling criteria listed. The code enable criteria will essentially list what needs to be checked to see what is blocking the test from running. Once that is identified and dealt with, then we could look further if necessary. I'd start with the O2 system and their heater circuits. The O2's have to test and pass for the catalyst test to run. I'm out teaching in New York right now and will be back in the shop this weekend. If you would like us to investigate this, call the shop number and we can schedule it in.


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Question Answered: 

See your other request.


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Question Answered: 

The transmission has its own temperature sensor, so if it is reporting an overheat condition then the transmission cooler may be failing or restricted. Lots of cars today have external coolers in front of the radiator for the transmission. You'll need to check for transmission fluid flow into, and out of the cooler. If the cooler is restricted, that will be debris from wear inside the transmission and you will likely be experiencing a repair in the near future.


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Question Answered: 

Did you know that there are more lawyers in New Jersey then there are ASE CMAT's (Certified Master Technician) in the whole country? Pushrod is right, ASE certification is rare in part because it is voluntary, not required, and its really only a minimal standard. Today there is way more to know and be able to do than any computer based multiple choice test could ever measure but its a start. As far as answering questions go, lately I have only been answering questions when I have some free time, (I do classes three nights a week) and then only if the question is from someone within fifty miles of me.


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Question Answered: 

Are you referring to diagnostic charges? If so, then it's not only normal it is necessary for the business to operate successfully.


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Question Answered: 

When you attempt to start the car and the lights do not come on, does cycling the key a few times result in a change and them working? The first thought is that the ignition switch is failing, but one has to also consider that you could be losing power to the switch. A good electrical technician would solve this easily.


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Question Answered: 

It should slow down, but not necessarily stall. You should achieve a minimum idle speed approx 600rpm in drive with that disconnected.


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Question Answered: 

The code means that the camshaft position sensor signal and the crankshaft position sensor sinals are not in sync with each other where the PCM expects them to be. The potential causes are the timing belt (if used ) could be off a tooth, the camshaft actuator could be stuck, the camshaft actuator oil control valve could be faulty, and/or passages inside the engine could be sludged.


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Question Answered: 

This needs to be diagnosed, and that requires some of the steps be done with a scan tool, preferrably the techII.


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