2004 Vauxhall Corsa Permanent live (kam) memory reading

2004 VAUXHALL CORSA
35,000 MILES • 4 CYL • 2WD • MANUAL
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ALEDG1
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  • 2 POSTS
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.
Apr 9, 2009 at 1:47 PM
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DAVE H
  • ✓ASE Certified Mechanic
  • 13,384 POSTS
  • ASE Certified Mechanic
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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Apr 11, 2009 at 6:16 AM
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