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2004 Vauxhall Corsa Permanent live (kam) memory reading

Tiny
ALEDG1
  • MEMBER
  • 2004 VAUXHALL CORSA
  • 4 CYL
  • 2WD
  • MANUAL
  • 35,000 MILES
I just wanted to know how the permant live (kam memory) is read by the ECU. The waveform tested of my car at permanent live shows 12v from battery and the ECU earth waveform oscillates. Do you know why the earth is oscillating, i.E. Switching down to ground and back up again. Is this typical for an earth circuit? Some advice would be great, thanks.
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Thursday, April 9th, 2009 AT 1:47 PM

1 Reply

Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
The ECU is designed to ground/earth circuits when all parameters are working correctlly .. this is how it controls the cars various sensors/relay's etc.


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Saturday, April 11th, 2009 AT 6:16 AM

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