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Automotive Technical Theory Forum

Professional automotive forum for discussion of the theory of operation for any automotive system or component. Discussions include electrical and electronic theory, engine propulsion theory, fuel system theory, ignition systems theory, and much more. This forum is for experienced automotive repair professionals only, membership required.

Continue to the description of our next automotive discussion forum, the Technical Tips Forum.

Recent Automotive Discussions in the Automotive Technical Theory Forum

Inductive crank sensor waveform
07/13/2020 in the Technical Theory Forum
Good morning all. Am i correct in assuming that either side of a two wires induction type crank sensor will have the same pattern on both sides?
AC Flushing Practises
07/11/2020 in the Technical Theory Forum
Lately been seeing lots of ac failures with junk in the system. I usually sell an ac kit with compressor, txv/orifice tube, condenser, and receiver/accumulator. I then run flush through all the lines. I use the metal can with a air hose attached. Giv...
DTC B0039
07/10/2020 in the Technical Theory Forum
I need help about the naming of DTC B0039. In the J2012 the naming is: "Second row right front stage 1 deployment control (sub fault). I think it is related to air bag but I would like to have a more simple description. Also, what is the meaning of "sub f...
The humble carburettor main jet
07/08/2020 in the Technical Theory Forum
G'day iATM, I was going through some very old paper work the other day and I came across some of my notes when I was involved with apprentice training, anyway I thought I would post this question. Please "do" over think this question. What does the main j...
Alternator and Magnets
07/07/2020 in the Technical Theory Forum
Recently had a customer with a 2003 Ford E350 come in with a failed alternator. Found a blue-point magnet light on it (Score!), from another shop. I'm wondering if there is any evidence that the magnet of this light riding on the alternator's case, for wh...

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