T-SB-0047-09 / IG1 Relay Freezing / 01-19-09

I am a newbie to this forum. Would you advise changing this sensor without having any symptoms?

It is very unlikely that I will experience your cold weather,only, when I go skiing , which is not that often.

I would appreciate your opinion as to if the risk reward ratios is good. Usually I hate mechanics messing with things unless necessary and or very simple.

Also in a few months I will be sending the car to Greece and will not be covered by the warranty over there.

Therefore I am trying to figure out all the possible problems I might encounter and repair them while the car is stateside and brand new

Any other things to look out for would be really helpfull, expecially as I am not a high mileage user and might not have more than 1000 miles on the car by the time I send it .

I am trying to get out all the possible kinks

Peter

jaybo said:

After reading the TSB I decided to replace the pink IG1 relay (90987-02030) that came with my 2009 RAV4 with the red one (90987-02030).

Click to expand...

Note (for people stumbling across this post first): the red one is -02031.

I'm surprised you had to brute-force it with pliers... I wouldn't recommend that to anyone (the circuit may be energized even when the car is off and you could conceivably crush the relay until the contacts close or short out). Rocking the relay carefully left and right should "walk" it out without damaging it (also, it'd suuuuuck if the new one was DOA for some reason and you were out the original relay!) :shock:

I got mine replaced a couple of days ago... the dealership that saw me come in the day after it first happened (and a few days after the TSB was published - unbeknownst to me) agreed to take care of it.

It sure sucks when it fails... It was about -20F here when it did it to me. I got from the garage (not heated but a bit warmer) to the bank, and when I came out 5 minutes later it started but wouldn't go anywhere (with the attendant raft of lights, no PS, no shifting out of park, etc.) It finally got back to normal on its own after a few minutes (perhaps because the heat was still working, the cabin warmed and so did the relay), or the heat of the relay's solenoid was enough to do the trick. Either way it suddenly starting coming back to life, finally saving me an emergency call to AAA.

If you look at the overall wiring diagram it's rather interesting: basically there are two relays: IG1 and IG2. IG1 takes care of the wipers, gauges and ECU. IG2 apparently takes care of the starter circuit itself (including the ECM). Presumably when relay IG1 acts up only the engine systems come online, while things like the cluster never get the message that they can come out of accessory mode.

Anyway, that's my best guess. I found a few places that have the OEM red -02031 relay for around $50-55, so if you can't get it replaced for free it's not that expensive, and if you live somewhere chilly it'll give you a lot of peace of mind.

hello guys

i have the same problem mine is Rav4 D4D 2006

i never have problem i took the car from italy to sweden not even one problem
i drive all the winter in sweden with -20 no problem
after the servie 4000 km the car give this alarm
Toyota Sweden they said that was the right rear speed sensor that was in failure
they replace and was working find
now in january 2010 i took the car again in toyota for the 40.000 km service
and after again same alarm problem
but every time i go there the alarm disapear
i print the bulletin and bring to them they say that never hear nothing about that
lucky when i was there the alarm come again the connect and they found again the same sensor

can be possible??
how can be that before the service was ok and after i have all this alarm again!!!!!

now is already 2 weeks that they have the car( they said is delivery problem) how can be possible???

now the problem is that the warrenty is over so i don't know what will be the surprise

somebody can help me
how i can show them that thís bulletin are valid and that the problem may can be there???

HELP!!!