Dealership won’t flash the speedometer to match tire size. What now?

[MrKnowitall]

I got the ECRI interface for our JK. Same unit will work on a JL/JT with an "unlock module". I adjusted tire size, tweaked speedo (does a GPS based cal), changed DRLs around, and lowered my TPM threshold.
You need a one-time access per vehicle. For a JT, you're out $130(ish) but every subsequent vehicle is only $50.
ECRI Calibrator - Tire Size, TPMS, Gear Ratio Speedometer - fits Jeep Wrangler

Sponsored

 

[spectre6000]

My dealer flashed my JL Wrangler for tire size at $125, but when I asked them to do the same for my Mojave they said that the factory flash is no longer available because of emission equipment rules.

I used to work in the biofuels industry shortly after the passage of the RFS (Renewable Fuel Standards) Act during the W administration. There's almost certainly nothing explicit about this in there, but this is what I was thinking from the second I read the OP. One of the provisions that made the act total bullshit lip service was the ability for manufacturers to make sticker mpg gains. The example that comes specifically to mind is GM's "FlexFuel". Pardon any errors regarding the technical specifics, but there's a sensor to detect ethanol percentage in the fuel. It costs pretty much nothing (and may not even technically be required), and doesn't really do much in the grand scheme. The part of the "FlexFuel" package that REALLY MATTERS is the sticker, the checkbox on the order form, and that money was paid for it. Dealers are incentivized to order as many of them as they can, and they're a very inexpensive checkbox ($250, IIRC, which is about as cheap as checkboxes come). BUT the Act states that if the consumer (the dealers' purchasing managers) select to pay for such an option, they intend to use it. That use is assumed at a ridiculous rate; 50% or so, IIRC. We all know that dealers bloat Monroneys like it's their business (for many, it is), and that most consumers don't have enough mechanically oriented brain cells to rub together. We all also know ethanol pumps are vanishingly rare just about everywhere outside of maybe Iowa. Yet the manufacturer gets to CLAIM a fleet MPG substantially higher for every sticker they slap on a tailgate. It's a con from top to bottom. Lobbyist trash.

Anyway... Diatribe aside, the point is that if a manufacturer creates an option that an end user selects and pays money for to increase fleet MPG numbers, how would it be any different in the opposite direction? Jeep went out of their way to make it so that 35" tires bolt right on with no modifications. The chief designer (pardon my forgetfulness, but I forget his name) even said as much repeatedly with the launch of the JL and JT models. BUT without looking too hard, I wonder if that's in print copy from Jeep anywhere? Advertising that feature might be detrimental to Stellantis's fleet economy. Going so far as to engage in commerce, exchanging consideration for such a thing, would be so concrete and specific that it's not a stretch to imagine that it would actively decrease fleet economy. Stellantis's US market models are pretty much limited to muscle cars and Jeeps, and neither of those are exactly... efficient ways to get around.

If this proves to be the new standard nationwide, I imagine this will be the reason.

 

[Terry]

Next closest dealer to me is a 3 hour drive.

Call that dealership and ask them if they will flash the computer for you.......

 

[Terry]

Next closest dealer to me is a 3 hour drive.

I/m in CValifornia. Where in Cali are you? Three hour drive. If the other dealer will do it, make a day trip out of it and you get to drive your JT

 

[cb4017]

I bought the extension, now I can have the cable and adapter connected in less than 15 seconds, and put back even faster.

I simply tuck the extension cables up on the trim under the steering wheel. When I need to connect the security bypass cable, I just reach up, pull the connectors down where I can SEE them, press the lock tab and pull........
The nice thing is, any direction - JSCAN, AlfaOBD, or any other solution that's been mentioned - for many Jeep owners, it's not a one time use thing. I've used both jscan and AlfaOBD several times already and used AlfaODB on my wife's new WK2 to show the dealership about the misfire. I've used the cable, adapter, software, to set tire size, program in the passive entry, program in the auto high beam and stuff I probably have forgotten I did already - oh, to diagnose the brake controller issues months ago before FCA figured out what the issue was.

Extension cable?? Do you have a link to one? It would certainly make life easier for fine tuning.
Thanks!

 

[ShadowsPapa]

Extension cable?? Do you have a link to one? It would certainly make life easier for fine tuning.
Thanks!

No matter your preferred tool - Tazer, jscan with obd adapter, whatever, this makes plugging things in and unplugging them a whole lot easier. Even if you run Tazer and prefer to unmarry and remove it prior to a dealer visit - this is the ticket.

This cable made connecting and disconnecting my OBDII bluetooth adapter a piece of cake taking only seconds, and no scratched hands.
Connect this and leave it in place. It literally extends those normally fun to reach connectors down below the dash.

https://www.zautomotive.com/product/z_sgw_ext/

 

[Gladman]

No matter your preferred tool - Tazer, jscan with obd adapter, whatever, this makes plugging things in and unplugging them a whole lot easier. Even if you run Tazer and prefer to unmarry and remove it prior to a dealer visit - this is the ticket.

This cable made connecting and disconnecting my OBDII bluetooth adapter a piece of cake taking only seconds, and no scratched hands.
Connect this and leave it in place. It literally extends those normally fun to reach connectors down below the dash.

https://www.zautomotive.com/product/z_sgw_ext/

Shadows, I have an extension cable for my Tazer. When I unmarry and remove to go to the dealer the SGM is also disconnected. Do you know of a blank module to connect that will complete the original circuit?

 

[ShadowsPapa]

Shadows, I have an extension cable for my Tazer. When I unmarry and remove to go to the dealer the SGM is also disconnected. Do you know of a blank module to connect that will complete the original circuit?

Not off hand.
What I would do is use these extension cables, leave them plugged into the SGM hanging down behind the dash. Then you could unplug the tazer by unplugging it from the cable connectors that originally went to the SGW - and connect those to the extension cable that is left in the SGW. You'd remove the tazer and the extension cable you use with it as one.

 

[Gladman]

Not off hand.
What I would do is use these extension cables, leave them plugged into the SGM hanging down behind the dash. Then you could unplug the tazer by unplugging it from the cable connectors that originally went to the SGW - and connect those to the extension cable that is left in the SGW. You'd remove the tazer and the extension cable you use with it as one.

Yes, and I’d love to do that but the problem I have is a buggered back. I can’t contort myself to get to the SGW connectors so that is why I got the extension cables to hang down and then plug the Tazer in at bottom of steering column height. A local shop guy plugged the extension cable in for me. So for it to be convenient (and useable) for me I really need a blank.
I guess I will email the Tazer people and ask if the can provide this. Thanks.

 

[ShadowsPapa]

The cable I linked to would plug into the SGW and you'd leave it there. It would hang down below the dash trim. In fact when mine isn't tucked up on the back side of the trim under the steering column, it hangs down several inches below the trim. There's no need to reach up behind anything. I can be outside of my truck, reach over to the trim under the column and nudge the extension and it drops out.
So in your case, I'd get the extension, have someone plug it into the SGW above and leave it laying on the back of the trim under the steering column.
My bet is you could unplug the tazer and simply stick those cables into the extension you leave hanging under the steering column.

Hard to explain, maybe I need to take a picture of how easy it is to get to things with that extension cable. I have back issues and now with the other issues related to the internal shingles, I can't even move my head or neck very far (until the pains move again) so when I changed my tire size setting, I didn't have to even get in or bend over. I stood by the truck, reached in and dropped the connectors down and hooked up.

 

[Shadowmaker]

You can buy my AEV ProCal SNAP for $100 shipped, new in box.

https://www.aev-conversions.com/product/procal-snap/

 

[ShadowsPapa]

You can buy my AEV ProCal SNAP for $100 shipped, new in box.

https://www.aev-conversions.com/product/procal-snap/

That's an interesting gadget for sure. And a savings of roughly 50 bucks off new.

 

[Gladman]

One reason I bought the Tazer is for the high idle function especially (imo) needed for a diesel. And since my trial settings using speed radars for calibrations seems to be dead-on now, I know the tire size setting that works.

 

[Clv22p]

I’ve got an AEV procal for $75 shipped.

 

[wwcenturion]

https://www.jeepgladiatorforum.com/...r-jscan-changing-tire-size.44183/#post-713328

Sponsored