Re: Audi A4 2.0 ALT None start Archived Message
Posted by Michael Whitworth on September 20, 2007, 1:01 pm, in reply to "Re: Audi A4 2.0 ALT None start"
Hi tony, The Crankshaft position sensor(CPS/CKP/CAS etc) is inductive on this engine, The Camshaft position sensor(CMP/CID etc) is a hall trigger on front of the inlet cam. The CPS will generate an AC waveform with the scope on dc the trace will show an ac waveform ie +/- if both scope leads are connected to sensor signal pins or 1 connected to battery earth and one connected to either sensor pin. Although this is dependant upon whether the sensors earth return has a path to earth or not and also whether the sensor signal is biased to lift it away from zero. If on AC the scope circuitry will measure deviance either side of zero, even if signal has a bias voltage in this case if no pulse/variation is present on AC scope will read zero and on DC it will read whatever the bias voltage is. now I am even more confused than you. Mike
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Message Thread: | This response ↓
- Audi A4 2.0 ALT None start - Michael Whitworth September 19, 2007, 8:14 am
- Re: Audi A4 2.0 ALT None start - Glyn Morgan September 19, 2007, 1:27 pm
- Re: Audi A4 2.0 ALT None start - Nick Bell September 19, 2007, 5:03 pm
- Re: Audi A4 2.0 ALT None start - john weddup September 19, 2007, 6:35 pm
- Re: Audi A4 2.0 ALT None start - Kevin Francks September 19, 2007, 9:55 pm
- Re: Audi A4 2.0 ALT None start - Colin bell September 20, 2007, 7:28 am
- Re: Audi A4 2.0 ALT None start - Tony Ludford September 20, 2007, 8:13 am
- Re: Audi A4 2.0 ALT None start - Nick Bell September 20, 2007, 8:46 am
- Re: Audi A4 2.0 ALT None start - lee mackintosh September 20, 2007, 9:12 am
- Re: Audi A4 2.0 ALT None start - Terry Wood September 20, 2007, 9:31 am
- Re: Audi A4 2.0 ALT None start - Tony Ludford September 20, 2007, 11:17 am
- Re: Audi A4 2.0 ALT None start - lee mackintosh September 20, 2007, 12:38 pm
- Re: Audi A4 2.0 ALT None start - Michael Whitworth September 20, 2007, 1:01 pm
- Audi A4 2.0 ALT None start - Terry Wood September 20, 2007, 2:05 pm
- Mike's Piston Pics - Peter Warman September 26, 2007, 8:50 pm
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