Power at coil both with ignition off.

Oct 26, 2007 5 Replies
D

Toyota 7MGE in a Cressida. I find I've got current to the coil whether the ignition is on or not. Approx .5V more with switch on. Around



10.9 V w/o switch on, approx 11.4 w/ign on.

Any suggestions as to where to look to track this down?



Also, took the coil to a local shop and it's measuring .8 ohms on the primary using a digital multimeter. Specs in the manual show .24 - .



30 . Car was running with this same coild a couple of months ago. The guy at the Toyota shop didn't think this would keep the car from running. I'm weakest on electrical issues so I don't have a feel for this. Opinions?

Also, any suggestions for how to go about testing the wires/ connections on the wiring harness? Have done next to no electrical stuff, don't mind learning.



Thanks.



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A

First thing to learn is to post the model year.

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U

I'm not certain about the electrical system schematic on your Cressida, but if you have voltage to the coil at all times, I think that it must mean the ignition module is sensing a "pickup" from the Hall effect sensor and signaling the coil to fire.

You might want to check to see if you have a bad ignition module, or incorrect wiring to the module itself.

As I mentioned, not knowing the Cressida, this is a guess.

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T

aarcuda69062 wrote in news:nonelson- snipped-for-privacy@newsclstr02.news.prodigy.com:

Well, he's doing better than before.

In his original thread on this subject (why he started a new one I do not know) all he said was "7MGE", leaving you to figure out both model and year.

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R

Unless Comboverfish chimes in, I think you will have to take it to someone with a factory repair manual to diagnose the condition.

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