EFI Relay, ignition clicking/dead battery solution!!! - Page 2 - Lexus IS Forum
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post #16 of 18 (permalink) Old 05-03-2016, 06:40 PM
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Originally Posted by jasonm4 View Post
Nice post. From the short time I have been on this forum and heard of EFI relay clicking issues, 95% time it was one of the two switches you have mentioned. Great work and that's awesome you found an easier workaround. +Reps to you for the great feedback which I'm sure I can help reference it to others who come across with this issue in the future

PS..I have reported this to moderators of this particular forum, as I cannot moderate your thread title.
I replaced the the ignition cylinder harness and the relay but still have the clicking when the key is out of the ignition....what is the problem the other 5% of the time? One of the shift solenoids on the transmission?

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post #17 of 18 (permalink) Old 05-17-2016, 01:46 AM
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I think I got it. I had the same issue with my RX300 99. Apparently the Unlock Warning Switch didn't fully disconnect the two terminals. Open circuit measured a few Mohms instead of infinity. I took the switch off the ignition cylinder, sprayed some contact cleaner and put it back. It worked like a charm.
Apparently the ECU randomly detected a key insertion.
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Last edited by lalexan; 05-17-2016 at 02:01 AM. Reason: Pictures
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post #18 of 18 (permalink) Old 01-08-2017, 04:58 AM
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Yes, my only advance is that when ever that type of problem 0ccure

1 check on the battery terminals if they are all in order,
2 open the fuse box and test all the fuses to know if they are all okey, after that press in the fuse to be well positon
3 check the alternator positive wire if it is contacting or not, if it is not then lose the wire out and clean the surface of the contact before tything in the wire.
4 check the igination key switch if it is ok or not. if it is not the igination faber key switch have to be changed .
if all this is put in place then fault will be souved.
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