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Old Mar 1, 2017 | 06:12 PM
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Andrew Bessent's Avatar
Andrew Bessent
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Joined: Feb 2017
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From: Ashford, Kent
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Thought id give an update and hopefully increase the chances of someone knowing whats wrong.

I used a noid light to test for injector pulse signal today and sure enough there is no signal from the ECU. I then checked the voltage at the camshaft sensor where i found 12 volts between the middle wire and the right hand wire as you look at the back of the plug. I had 3 volts between the middle wire and the left hand wire with ignition on only, and this reading fluctuated between 3 volts and 4 volts during cranking. I then checked the live data for engine speed which was around 200 rpm during cranking. I then disconnected the crankshaft position sensor and checked that the live data showed 0 rpm during cranking, which it did.

I also checked what the mass fuel demand reading was, which is 39mg when i start cranking and then shortly after it drops to 0 and i get fault codes of p0251 & p1211.

I have noticed that in addition to the crankshaft position sensor the mk3 mondeo has a crankshaft pulse sensor. Does anyone know where this sensor is and exactly what its purpose is? Could this sensor cause the fault that i am having?

Also, does anyone have a wiring diagram which covers the injector circuit?
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