ardasaliah Posted February 12, 2007 Share Posted February 12, 2007 My car is not sparking at all. I need some advice- When I unplug the crank sensor- the ECU does not register a fault code. However it registers any other sensor that I unplug e.g. turbo pressure. My car is not producing a spark at the moment- so i check the resistance on the crank sensor and it was within range. so that’s fine. The ignitors fine The problem is that the electrical connector to the crank sensor has no voltage at all when the ignition is on (just before starter cranks) Could this be my problem. The multimeter shows a voltage of 0.02 at the plug. Surely it should be more. All the other sensor that I check all have about 5 v. any advice? hope this is clear. Link to comment Share on other sites More sharing options...
absz Posted February 12, 2007 Share Posted February 12, 2007 cannot remember the right fiqures or voltage so i won't guess:innocent: but if you crank the engine over and the rev counter needle is very slightly jumping up and down while cranking then your sensor/feeds are fine. Link to comment Share on other sites More sharing options...
Ian C Posted February 13, 2007 Share Posted February 13, 2007 I don't think they get fed a voltage, isn't it just a pulse signal generated by the Hall effect or something? The wiring diagram backs that up, it's got two grounds, a common position sensor one and a unique one for that sensor (B27 in this case). I guess if you had a fast reacting enough multimeter you could measure its pulse output while turning the engine over? You can also check the sensor's resistances, which should be: Cold (0-50degC) 835-1400ohms Hot (50-100degC) 1060-1645ohms -Ian Link to comment Share on other sites More sharing options...
Chris Wilson Posted February 13, 2007 Share Posted February 13, 2007 Get it checked with an oscilloscope, it doesn't have a voltage feed as such. Link to comment Share on other sites More sharing options...
ardasaliah Posted February 13, 2007 Author Share Posted February 13, 2007 sorted- it just unbolted itsself at the crank. Thanks Link to comment Share on other sites More sharing options...
Ian C Posted February 13, 2007 Share Posted February 13, 2007 Aha so it was all wired up but not in place? Excellent, a free fix Enjoy it, they don't happen often -Ian Link to comment Share on other sites More sharing options...
absz Posted February 13, 2007 Share Posted February 13, 2007 well done;) best way to learn is by doing it yourself:d Link to comment Share on other sites More sharing options...
fredm Posted February 14, 2007 Share Posted February 14, 2007 The crank position sensor works by "inductive pulse". To test : Disconnect the crank sensor multi plug, measure across the two outputs of the sensor plug with a multimeter set on AC volts. AC not DC. While someone cranks the engine look at the output, you should have at least 0.5v and preferably rising as the engine cranks. Link to comment Share on other sites More sharing options...
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