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2007 Elantra Speedometer / Odometer
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Comments
For those who have already had the unofficial reprogramming done (like ebbuts), I would recommend to have the update done again with the new TSB. It's possible the latest patch is a better calibration and to make sure your car's warranty is officially extended by 3%. I'm also going to make sure that I retain a copy of the TSB and all service documents for warranty purposes...
Technical Service Bulletin
Subject: ECU REPROGRAMMING FOR SPEEDOMETER DISPLAY CUSTOMER SATISFACTION ACTION (CSA)
Group: ELECTRICAL
Number: 07-90-010
Date: SEPTEMBER, 2007
Model: 2007 ELANTRA
CIRCULATE TO: [ ] GENERAL MANAGER [X] SERVICE ADVISOR
[X] SERVICE MANAGER [X] WARRANTY MGR [ ] SALES MANAGER
[X] PARTS MANAGER [X] TECHNICIAN
DESCRIPTION:
Some 2007 Elantra vehicles equipped with automatic transaxles may display inaccurate speedometer readings. This bulletin provides the procedure to reprogram the Electronic Control Unit (ECU) to resolve this condition.
IMPORTANT NOTES:
This TSB provides reprogramming instructions for GDS only. You may have to perform an initial internet update of GDS to receive the necessary data items #90 and #91. If a vehicle has not been driven for several days, first start and run the engine for several minutes to ensure it has a reasonably charged battery before conducting the reprogramming. A low vehicle battery charge can prevent reprogramming.
VEHICLES AFFECTED:
Model: 2007 Elantra vehicles with automatic transaxles. Applicable vehicle production date range: From August 1, 2006 through May 28, 2007.
(The rest is the detailed procedure which only makes sense to a technician I suppose.)
From what I know, the problem affects both the odometer and speedometer even though the new TSB only mentions the speedometer. On my car, the error is about 10% high on both meters. The TSB reprogram will correct the calibration on both meters since they are both controlled by the ECU. The TSB does not address adjusting the odometer back to some arbitrary setting. There would be legal reporting issues involved when changing the odometer. So Hyundai has instead chosen to extend the warranty by 3% and avoid any reporting issues at all. In my opinion, I think it's better this way. Look at my case, the odometer reads 10K, but I know it should read only 9K. At this point, I'm not overly concerned with only a 1K error because the warranty extension gives me more than 1K over the long run. The longer you wait to get it fixed however, the mileage difference would become an issue. I suppose you could complain loud enough and get them to set the odometer back, but are you really concerned about it reading only 1 or 2K high at this point?
You have a very valid point and have fixed my confusion on the matter.
Thank you again,
Natty
Speedometer - Odometer Recalibration.
I won't retype the whole letter but it says automatic equipped Elantras made thru 5/28/07 MAY indicate fasters speeds and more miles than actual.
They are asking us to take our car to the dealer (call for appt)and they will reprogram the Electronic Control Unit at no charge.
They will also extend the mileage period of all warranties provided with your vehicle by 3%(in red)
If you have any difficulty getting this recal performed call 1-800-633-5151
Personally I tested my speedometer with another car when I test drove my car, and it was spot on with the other car, but I may check it anyway, since maybe it changed when car was breaking in.
G
--------------------------
Chronicles of a Hyundai Owner
http://www.hyundaiowner.blogspot.com/
I asked about their criteria and was told by the service writer that they check the car's computer for the existence of a particular code (I'm not sure which) and if it's set to one of the values they're aware of as problematic, then they perform the work specified in the TSB. So, if your car has the problem and the dealer is refusing, then maybe some sort of 2-car road test would help.
Also, the dealer does not handle the warranty extension. You still have to call HMA and get that updated through them. I'll be starting that process this week.
If it's of any value, I can post the service order line item for the TSB work.
HTH
Does anyone have any comments on this?
Thanks.
you might have problems "demanding" anything from a company the size of hyundai.
every car's 08 EPA mpg is going down, but the 07 and 08 elantras will get the same mileage, it all depends on your driving habits.
I was at the dealer this AM for an oil change. I asked him about the letter and re-programming. This dealer had done a re-program on mine in June 2007, long before Hyundai finally came out with one officially. He told me they wanted to check mine to make sure it had the #91 re-program per the TSB which it does have. So my car has been OK since June 07. Get your cars in and get them fixed up guys. The wait for some of you is still better than buyng new tires. The dealer also said the 3% additional miles should be automatically extended once your car is fixed.
Back to MPG. No matter what, this 2007 gets better mileage than my 2001 ever got. Have no idea why but it does even with the re-programming done.
The reprogram was done only 5 days ago and that includes a long highway trip, so my numbers for this tank aren't representative of my usual driving. However, I am seeing MPG numbers about 1 MPG less than I would expect.
If I took it easy (~60mph on the freeways), I'd prolly be getting at least 29/30 MPG. However, frequent driving near/over the speed limit really makes the MPG nose-dive.
We all know A/C cuts MPG. My experience says that temps below 50 also cost MPG. So, if you're not in a cold climate, say above 50* from when you got you car until you started using the A/C you were probably driving under better MPG conditions (although you had the break-in period).
Reprogramming the speedo will not affect the MPG.
However, you're talking about an MPG reduction of probably 5 to 10%. Yet the warranty increase is only 3%.
Something doesn't add up. If your odometer was registering 3% higher and you drove 100 miles, the odo would read 103. Project that to 300 or 309 miles. Assuming a 10 gallon fill-up, you'd be looking at a .9, not 2 or 3 MPG difference. A/C usage will account for some of the difference, temperature range will also.
My current calculated mpg is roughly 28 mpg (during non-ethanol gas months). I drive about 40% city, 60% highway with the A/C on in moderate/mild temperatures. After I get my car re-calibrated, I'll post my new calculated mpg.
Oh, and here is another thing; When they re-calibrate the car, do they modify the odometer to reflect what the mileage should have truly been? Because I am close to qualifying for an insurance discount for driving under 10,000 miles/year, and missing out on that because the car was over-reporting mileage is going to irritate me.
Also, the MPG on the window stickers is based on EPA numbers, so no, its not false advertising, cause they aren't hyundai numbers.
No, they don't modify the odometer. Hyundai has extended the warranty 3%, and 3% of 10000 miles is only 300 miles, so you should not worry. Besides, what does your insurance company do, come out and check you mileage every year?
Again, you have to understand that these numbers are just averages, and unless you drive exactly as the test drive did, then you may not get these results. The EPA does these test to give you a range of what you SHOULD expect, not what you will ACTUALLY get.
We had ours reprogrammed last week; haven't confirmed speedo or odometer yet but apparent(oh gosh am I really going 80 MPH?) speed is more real.
Make : HYUNDAI Model : ELANTRA Year : 2007
Manufacturer : HYUNDAI MOTOR COMPANY
Service Bulletin Num : 0790010 Date of Bulletin: SEP 01, 2007
NHTSA Item Number: 10023141
Component: ELECTRICAL SYSTEM
Summary:
ECU REPROGRAMMING FOR SPEEDOMETER DISPLAY CUSTOMER SATISFACTION ACTION (CSA) *NJ
I don't know about anyone else, but I wouldn't buy a car if the mileage isn't correct. They need to recall the car and replace them with one that doesn't have incorrect mileage. I see a lawsuit in the future about this!