[KB] How to Reset Gas Gauge

Same subject, different version.

I carried my 04 prius in for a fix of the inaccurate gas gauge. i knew about the TSB from this site a
long time ago, but just never got around to having
it done. I brought the car in, left it at the dealership
where it stayed for most of the week. At about day
four I called and asked what was happening and they said please come get your car, you'll need to bring it back next week. We had to order another part which should be in by then. Next week comes
and the car stays another few days. I call again and guess what. They need another part, please
come get the car. Third week, brought the car in
and a few days later they call and say it's fixed. They even washed it. Good, right?

Well...my son goes to fill the car the next Saturday and puts the nozzle in the filler tube, clicks the automatic fill thing on the nozzle and turns his back.
About 5 dollars into the fill he smells gas and hears
a splashing sound under the car. The gas is pouring out onto the ground instead of into the tank. This kind of thing really instills confidence in our toyota techs. Anybody else have this experience??? Could it be they just didn't connect two pieces of pipe?

 

I've tried this repeatedly but the best I was able to do was see 5 dashes where the odo mileage numbers were. The 5 dashes slowly decrease to 1 dash and then the odometer mileage reappears.

Any ideas what I'm doing wrong? Is there something about getting to IGN ON that I'm forgetting?

 

To popoff and Bill, the instructions are from the TSB's. I know from experience that sometimes you have to try a couple of times to get it right. If needed I will try to double check this week on a Prius to make sure there are not any thing we are missing, :roll:

To jed,when I have one that I am planning on doing,I will print out the TSB and show the parts guys what is needed to be ordered( the part numbers are listed in the TSB). Sometimes the parts will be in the next day but if it is longer we have the customer bring it back when all the parts are in. Multiple trips back are not what Toyota or I,as a tech, would like to see. And for the gas running out,yes it sounds like somethings wasn't hooked back up. Doesn't show good for that tech or your dealer, .

 

Thanks for the reply Rick.

car went in today and surprisingly enough was
repaired in one day. hopefully that will be the
end of gas gauge troubles.

 

Quick....someone pass this information along to NASA:

Faulty Fuel Gauge Delays Shuttle Launch

By MARCIA DUNN, AP

CAPE CANAVERAL, Fla. -
NASA scrapped Wednesday's launch of the first shuttle flight in 2 1/2 years because of a fuel gauge that mistakenly read full instead of empty....

LINK: http://news.yahoo.com/news?tmpl=story&u=/a...c/space_shuttle

 

OK, so how do you tell if it is inaccurate enough that it needs resetting?

 

Ok,here is an update. I tried to do a 2nd gen this week by the instructions I gave everybody. Verdict; I couldn't get it to go either. Thinking back,I got a handout while at Hybrid Diagnostics class in May and the steps for the 2nd gen is slightly different. I remember helping another tech and using these steps and had no problem. I will try it out the first chance I get and post the updated steps then. As for the 1st gen,the steps are the same as what is posted,so they should work ok.
As for when to do it,us techs use it when changing the combo meter,making fuel tank changes(such as with the TSB for 2nd gen) or if the customer is having major fuel gauge accuarcy concerns.

 

Right Bill.If you are on a level surface and perform the steps,you either won't be changing anything because it is already set. Or you will be correcting an inaccurate reading you maybe having, :wink:

 

according the the service bulletin it goes like


D. Make sure your foot is off of the
brake pedal.
E. Push in and hold the
“ODO/TRIP†button.
F. Turn the power switch ON
(push the “POWER†button twice).
G. Turn the “ODO/TRIP†button OFF,
then ON 3 times within 5 seconds.
H. Continue to hold the “ODO/TRIPâ€
button until the “ODO†indicator in
the display turns off and a 6–digit
code (######) is displayed.
I. Release the“ODO/TRIP†button.
J. Push and hold the “ODO/TRIPâ€
button for 5 seconds or more
again. The 6–digit code (######)
will then change to a 5–digit
code (#####).
K. After “1†is displayed at the 3rd
digit of the 5–digit code, release
the “ODO/TRIP†button.
L. Approximately 5 seconds after “1â€
is displayed at the 3rd digit, the
“TRIP A†indicators are displayed,
and the odometer returns to the
normal operation.[/i]

NOTE:
The “TRIP A†mileage will revert to
0.0 miles in this procedure.
Do not drive the vehicle before the
reset procedure has been completed.
HINT:
If a write error occurs, start the
procedure again from the beginning.

the 5 digits you see will be

X = first two digits
Y = middle digit
Z = last

X: Values Written Into Meter
(Longitudinal Direction)
Y: Write Status and Result
Z: Values Written Into Meter
(Lateral Direction)
Write Status and Result:
0: Writing
1: Write Completetd
2: Write Error
3: Write Canceled

 

If you follow closely Dave, your explaination is the same as mine. You just made it more clearly, . That is from the Fuel Pipe TSB,right? I had that TSB in the car I was trying and it won't go that way. The info I have from class is slightly different. I am going to personally try it ( have used it one other time and worked) before I post the updated info, 8)

 

yep mine is cut and paste from the TSB and u r right. thought it added an extra button push but actually it only really adds a bit of background info on what the numbers mean... still the same steps.

 

Ok everybody,sorry this has taken to long. Been busy with a lot of things going on and I forgot, . I had a new 2G Prius in for PDI and decided to give it a try. And guess what,I found out what we were doing wrong! Just one little step messes up everything. Here is the steps from the TSB and only applies to the 2G.

1. Park the vehicle so as it is level,front to back and side to side.
2. IgOn and make sure that "Trip A " is showing on the odo ( this is where we made a mistake ).
3. Power down.
4. Keep your foot off the brake.
5. Push in and hold down the Odo/Trip button.
6. Push the Power button twice to IgOn ( not Ready mode ).
7. Turn the Odo/Trip off then On 3 times in 5 seconds.
8. Continue holding the Odo/Trip button until a 6 digit code appears.
9. Release,then push again the Odo/Trip button for another 5 seconds. The 6 digit code will change to a 5 digit code.
10. After the middle digit,of the 5 digit code,changes to "1" release the Odo/Trip button and the odometer will return to normal reading.

Hope this clarifies the steps.

 

And probably NO ONE in the right seat.

 

I would probably say that is correct. I'm assuming that Toyota figured that the reset would only be done by a tech at the dealer & he would be working alone, :lol: .

 

Works great.

Thanks!

 

It sounds like you've reset your Maint Req'd indicator mileage back to zero.

Keep an eye out for your next oil change, because the car won't warn you.

 

This is the same procedure as before, and it doesn't work - for me anyway.
Gary