Question about Renault 181

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Scenic non start

Hi MobyMech.
Thanks for your response - I thought the same re: crank sensor & found no ac voltage under cranking so replaced it. Still no noid or sparks. Don't recall seeing a 'Check engine' light at all so sounds like your suggestion of ECU doing nowt is likely. I have plenty of battery voltage inputs to ECU but seemingly nothing coming out. Do you know if ECU's are interchangeable on this model? Once again, I appreciate your time & help with this.
Regards, Steve.

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I wouldn't have thought the ECUs would be interchangeable due to the immobiliser. Thinking about it, a fault with the immobiliser would cause the lack of spark and noid. I know they usually also disable the starter motor as well, but a fault would change the way it responded.

I think a computer is needed here to live scan the ECU and see exactly what the little blighter is playing at before you go to the expense of an ECU.



Posted on Jun 16, 2008


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Scenic non start

Nice one, a lot cheaper than an ECU!

Well done.



Jun 24, 2008 | Renault 181 Cars & Trucks

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R reg Megane Scenic non start


Well, no noid signal and no spark says to me that the crank sensor is at fault.

Does the check engine light come on when you turn on the igntion? If not then the ECU is not waking up.



Jun 11, 2008 | Renault 181 Cars & Trucks

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