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What should the amperage draw be on the ECU on this 1992 Toyota Carolla?

Tiny
ARIEVANDERZOUWEN
  • MEMBER
  • 1992 TOYOTA COROLLA
  • 165,000 MILES
I bought an older 1992 Corolla for my son as he is starting to drive. After a week of sitting the battery was dead. Checked the bat 10.5 volts replaced it. Parasitic draw test showed a 4.26 amp draw with every thing off. After some time I traced it down to the ECU. Pulled the fuse amperage draw drop to 0 amps. What then is a proper draw for the ECU? Could the draw be passing through the ecu by another sensor. Looking at the schematic it looks like it is not an easy job checking all the resistence in every circuit.
Any ideas.
I could not find anything in my Alldata DIY account?
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Sunday, October 7th, 2012 AT 10:47 PM

2 Replies

Tiny
KHLOW2008
  • MECHANIC
  • 41,815 POSTS
ECU do not draw such high amperage. Check the security system. It is linked to the ECU.
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Sunday, October 7th, 2012 AT 10:51 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
500 millivolts is about the draw.

I think you have another issue on that circuit.

Roy
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Sunday, October 7th, 2012 AT 10:52 PM

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