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Old 06-23-2019, 12:32 PM #16
hankd hankd is offline
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yep it was programmed at the dealer. the truck will turnover, start and run. keys and fobs work normally.

had a mechanic friend over a few times. first problem was all the fuses in the box under the hood were 'hot' even when they shouldn't be (ie a multimeter will read current on fuses it shouldn't when there is no key in the car). that problem went away on its own, which is troubling. but any time the etcs fuse is plugged in it blows immediately. we have not taken the dash apart yet, though i have no reason to expect anything was damaged behind the dash. if we disconnect the ecu, the a newly installed etcs fuse will be fine, but as soon as we plugged the last cable in the ecu the fuse fries immediately.

the alternator is shot and we cut the wires (clip was siezed) to it to make sure there wasn't some open relay in the alternator. i ordered a new alternator and clip for it.

we wondered if the ecu is partially working where it does what it's supposed to do but something in it is shot and causing the fuse to blow. took the ecu apart and did not see anything obviously toasted at first glance.

when my mechanic had the ecu hooked up to his scanner, he had a read/write option which he wasn't familiar with. i am wondering if i need yet another ecu if i might be able to use his scanner to read the key/vin off the current one and write it to a new one, saving me a trip to toyota.

major nightmare here haha. i've read all the threads on here about ecu water damage and done a hefty bit of googling over the last few months. but i'm grateful for any replies or further insights anybody else might have.

Last edited by hankd; 06-23-2019 at 12:35 PM.
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Old 07-05-2019, 04:50 PM #17
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turns out the alternator fried in the water and that was causing the fuse to blow. replaced the alternator and the truck is working again!
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Old 07-06-2019, 05:49 PM #18
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Quote:
Originally Posted by hankd View Post
turns out the alternator fried in the water and that was causing the fuse to blow. replaced the alternator and the truck is working again!
Congrats! And thanks for posting the final fix, this will no doubt help somebody down the road as it was a complex troubleshoot.
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Old 07-06-2019, 06:23 PM #19
AuSeeker AuSeeker is offline
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Quote:
Originally Posted by hankd View Post
turns out the alternator fried in the water and that was causing the fuse to blow. replaced the alternator and the truck is working again!
Quote:
Originally Posted by waypoint View Post
Congrats! And thanks for posting the final fix, this will no doubt help somebody down the road as it was a complex troubleshoot.
This just goes to show what sometimes seems to be a complicated issue turns out to be relatively a simple fix that was just over looked/not checked out!

Glad you got it fixed!!
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