Pro Comp ACCU PRO Jeep JK Wrangler
Speedometer & Odometer Calibrator

October 04th, 2007 | Category: Jeep JK Write-Ups, Wheels & Tires
 
 Unlike previous Jeep Wranglers that had a simple gear in the transfer case that you could change out with ease, the all new JK Wrangler is completely computer controlled now and calibrating it’s speedometer and odometer to match any tire taller than 32″ or a gear ratio any higher than 4.10 was virtually impossible. That is, at least until now anyway. 

Thanks to the guys over at 4 Wheel Drive Hardware who just sent me the Pro Comp ACCU PRO, I was able to accurately calibrate both the speedometer and odometer on my Jeep JK Wrangler that is currently running 315/70R17’s (approximately a 35×12.50) Pro Comp Xtreme M/T’s and Superior 5.13 gears. And, if I had an automatic, the ACCU PRO would have also instantly corrected the computer controlled shift points as well.

Now, I will tell you that this handy device isn’t exactly cheap as it does retail for about $200 but in my humble opinion, it is well worth the cost especially since it can be used over and over again to keep your Jeep’s speedometer and odometer reading accurately throughout the life span of your tires. Of course, once you do get new tires, you will most likely need it again. And, as a final added bonus, the ACCU PRO can also read and clear diagnostic trouble codes and that’s something everyone can always use sooner or later.

What You Will Need


• Pro Comp ACCU PRO
Part #PC52001-1
• Computer w/USB Port
& Internet Access
• Carpenters Level
• Tape Measure
• Tire Pressure Gauge
• Tire Pump 

 

What You Will Get


• Pro Comp ACCU PRO Programmer Unit
• Programming Cable
• USB Cable
• Software CD 

 

ACCU PRO Features


Speedometer/Odometer
Part-Throttle Shifting Corrections:
Instantly corrects the part-throttle shifting, speedometer and odometer readings up to 54″ tires. 

Automatic Transmission
Adjustments:
Electronically adjusts shift firmness for faster acceleration.

Read & Clear Diagnostic
Trouble Codes (DTC’s):
Informs of any DTC’s at the push of a button.

Back to Stock Programming
or Change Option Settings:
Downloads and stores your factory stock programming, enabling you to re-program back to stock tuning or change your option settings at any time.

 

Where to Buy It


I was sent my Pro Comp ACCU PRO Speedometer & Odometer Calibrator from 4 Wheel Drive Hardware to test it out and see if it works. Need I say, you should be able to purchase one from them or from Northridge4×4 as I know that both carry it now.
   

Instructions
Here’s a pic of all the things you will get with your new Pro Comp ACCU PRO Speedometer & Odometer Calibrator.
1. Insert the CD ROM that you will get with your Pro Comp ACCU PRO into your computer and install the Tuner Software that comes on it. Then, use the USB cable that comes with the kit to connect your ACCU PRO to your computer, run the Tuner Software and carefully follow the step by step instructions it gives you. During this process, the Tuner Software will go online and will look for any firmware updates that the ACCU PRO needs to install.
2. Insure that the tires on your Jeep JK Wrangler are properly inflated. Then, using a tape measure and a straight egde placed on top of one of your tires, measure  what the actual height of it is as shown in this pic. NOTE: After doing this a couple of times, I have found that simply measuring from the ground to the shoulder edge on top your tire will give you a more accurate measurement.
3. Climb inside your Jeep JK Wrangler, make sure your parking brake is set, insert your key into the ignition and then turn it to the RUN position but DO NOT start the engine itself.
4. Connect the programming cable to your ACCU PRO and to your Jeep JK Wrangler’s OBDII diagnostics port which is located under the driver side dash as shown in this pic. 

NOTE:
During the ENTIRE programming process, it is very important that you DO NOT remove or disturb the programming cable. The only time you should remove the cable from your Jeep JK Wrangler’s OBDII diagnostic port is when the ACCU PRO informs you that the installation has been completed.
It is also very important that you DO NOT leave your Jeep JK Wrangler during the programming process.
5. Once everything has been plugged in, the ACCU PRO programmer will display specific instructions for you to follow on its screen and you can make the appropriate selections needed by using the UP/DOWN and YES/NO buttons on the side of it. And, when you are prompted with the following message: 

TO ENTER PROGRAMMER MODE, PRESS Y TO EXIT PROGRAM,
PRESS N

Press the “Y” button to enter the programmer mode.
6. Your ACCU PRO should now be prompting you with the following message: 

IF TIRE HEIGHT HAS BEEN CHANGED FROM ORIGINAL, PRESS Y IF TIRE HEIGHT HAS NOT BEEN CHANGED, PRESS N

Press the “Y” button and then use the ARROW buttons on the ACCU PRO to enter in the actual tire height of your new tires (the ACCU PRO will allow you to enter in a measurement that is accurate to a 1/4″). Then, press the “Y” button again to select it.
7. Your ACCU PRO should now be prompting you with the following message: 

IF REAR AXLE RATIO HAS BEEN CHANGED FROM ORIGINAL, PRESS Y
IF REAR AXLE RATIO HAS NOT BEEN CHANGED, PRESS N

If you are still running stock gears, press the “N” button at this time. If you have upgraded your gears to 4.88’s or 5.13’s like I have, press the “Y” button now and use the ARROW buttons on the ACCU PRO to locate the gear ratio you are currently running on your Jeep JK Wrangler. Then, press the “Y” button again to select it.
 

 8. The ACCU PRO will now scroll across its screen the tire size and gear ratio you have selected and if the information is correct, press the “Y” button to begin the programming of your Jeep JK Wrangler’s computer. If it’s not correct, press the “N” button to start over again. The ACCU PRO will notify you when it is finished programming your Jeep JK Wrangler’s computer. When it does and ONLY when it does, you may disconnect it from the OBDII diagnostics port.
 

That’s it, you’re done. Your Jeep JK Wrangler’s speedometer and odometer should now be calibrated to match the tire size and gear ratio you are currently running and they should both be reading correctly now. 

Please let me know if you have any questions.
 

 

40 Comments so far

  1. Maroonjeep October 4th, 2007 12:59 pm

    I tried this but i came up with an error. It said C1: abs control module. I think this is most likely because my jk has a tsb for the abs control module that hasn’t been fixed yet. we will see.

  2. gjeepguy October 5th, 2007 9:28 am

    is this available for use/reflash at any dealer/install shop. I would like to get my odometer and speedometer correct, but not for $200

  3. Robert October 5th, 2007 5:06 pm

    Eddie, I sure hope that this works, I put Procomp 33 on my JK this summer, I keep sending it back to the dealer because the resets have not worked, a waste of $240.00. I had to pay twice for the two resets from the dealer and they are only good to a 33 tire size. this sounds like a much better way to go.

    Thanks for the info.

  4. thomas snelson October 6th, 2007 11:15 pm

    I have two JK’s, will this let me calibrate speedo on both, because in the past have bought products, in order for them to work on other vehicles you have to set everything back to stock before it would work on another.

  5. Mike October 7th, 2007 11:04 am

    Have you been able to find out the true MPG with the Jeep? I also am running 35″ Procomp MT’s and 5.13 gears.

    Thanks

    Mike

  6. wayoflife October 8th, 2007 8:30 pm

    Hi gjeepguy, sorry but I don’t think there are any dealerships that have this tool and/or will be able to help you out.

    Hey Robert, actually, you should get your money back from your dealer as they can only calibrate your Jeep’s computer to read 32″ tires, NOT 33’s. They just ripped you off. As far as the Accu Pro goes, it does really work.

    Hi Thomas, the one I have will work on multiple vehicles but from what I’m told, they will soon be made with VIN locks so that you can’t.

    Hey Mike, yes, once you get things set, you will be able to have the speedo, odometer and other functions working again.

    Eddie

  7. tony October 9th, 2007 2:40 pm

    Does anyone know if I can program it for a smaller wheel? I’m building a custom sport low-rider style wrangler JK for a company. I’m assuming the speed will be off, would this product be able to adjust for that?

    Thanks in advance,

    Tony

  8. Joe October 9th, 2007 6:53 pm

    Eddie,

    I just called 4wd.com…they told me they weren’t selling Pro Comp ACCU PRO Programmer Unit at this time. The rep I talked to, Justin, said it wasn’t listed in their system currently. Any word on what’s going on?

    Joe

  9. wayoflife October 9th, 2007 7:13 pm

    Hey Joe, Honestly, I don’t know but I do know that you can buy one from Northridge4×4 here:

    http://www.northridge4×4.com/proddetail.php?prod=PC-52001-1

    Eddie

  10. iadventure October 11th, 2007 3:51 pm

    Hey Eddie,
    I just installed my BB 2.5 lift yesterday. YOu had mentioned that you live in Laguna Niguel. Could I drop by to borrow your ACCU PRO to calibrate my 35in tires?
    Thanks,
    Troy

  11. Mike October 12th, 2007 9:26 pm

    Has anyone had any issues with the programmer not reading the Onboard computer? I follow the instructions, plug it in, and it keeps telling me to push the Y button when connected. I do it says reading onboard computer but then goes back to “attach, turn to run and hit the “Y” button.??? Can someone throw me a bone?

  12. Steve October 14th, 2007 11:56 pm

    I received my AccuPro from Northridge and the box says it is for a 2003-2007 Dodge Hemi 5.7L Truck/SUV. I e-mailed Northridge and they said as long as it is part # PC52001-1, then I am fine. Can anyone else that has received this verify that this part # is the correct one? I am nervous to plug something into my onboard computer that might not be for the right vehicle.

  13. Bill October 15th, 2007 1:38 am

    Hey Eddie
    I have been having a problem with the ESP. There is a TSB out about it. I have gone to the dealer to get the computer flashed they say they can’t cause of the bigger tires etc. They said the ESP problem is because of the bigger tires. Do you think this unit might fix my ESP activation problem?
    Thanks for the help as always

  14. Joe October 16th, 2007 12:39 am

    I got mine today. Worked like a champ. Be sure to update the software before you use the AccuPro. Update the software, not just the update to the device.

  15. Steve October 16th, 2007 2:48 pm

    Joe,

    What did your packaging say on the outside? Did it say JK, or did is say it was for a Dodge Hemi?

  16. Joe October 16th, 2007 7:59 pm

    Dodge Hemi. I ordered mine through Northridge 4×4. I had spoken to David and he explained to me that it was the correct unit. I don’t think ProComp has had a chance to change the packaging yet. It worked great. My Jeep shifts (automatic) much more smoothly, and at more appropriate times. I haven’t had a chance to precisely accurate the speedometer is now, but at 25mph and 65mph, I’m rolling right with traffic–so it’s approximately on target :) .

    I don’t think it said “JK” anywhere on my package, or in the paperwork. I had called ProComp also–Ken was very helpful. I pulled my Jet chip before I programmed my Jeep, then plugged the chip back in afterward. Everything went well.

  17. Steve October 16th, 2007 8:16 pm

    Joe,

    Thanks for the information….very helpful!

  18. cd thompson October 23rd, 2007 3:06 pm

    will this fix the problem my jeep has on clover leaf corners

  19. wayoflife October 23rd, 2007 6:27 pm

    If you are talking about your ESP going off, no. You will need to get your steering wheel centered and address your suspension geometry for that.

    Eddie

  20. cd thompson October 24th, 2007 9:54 am

    Eddie what do i need to do to get this done my dealership is incompatant and they are the people who put the lift on my jk. They also said fixing the tire size will fix my esp problem

  21. wayoflife October 24th, 2007 3:31 pm

    cd, your dealership can only calibrate your JK’s computer to read 32″ tires. If you have bigger than 32″ tires, you will need to puchase one of these ACCU PRO’s and set your speedometer yourself. As far as your ESP problem goes, calibrating your speedometer will not fix it. You need to have your steering wheel centered and caster set appropriately for that.

    Eddie

  22. cd thompson October 24th, 2007 9:26 pm

    Eddie I checked my steering wheel today and it cant get any more centered than it is,so the next thing to do would be check the allighnment? What about the TSB does it apply to my jeep it has a 4inch skyjacker with 35inch tires or is it just for 4×2 jeeps? I have an automatic trans the ACCU PRO will also adjust my shift points or will it.

  23. wayoflife October 26th, 2007 3:09 am

    cd, If you have adjustable front upper and lower control arms, yes, you should have your caster adjusted so that it is closer to a +6°~7°. If you do not have them, there will be nothing for you to have aligned. As far as your shift points go, the ACCU PRO will set them to where they need to be in relationship to your tire size and gear ratio but you will not be able to specifically set them.

    Eddie

  24. cd thompson October 26th, 2007 9:58 am

    Eddie
    I have not adjusted anything all I have done is check the stearing wheel alighnment I think I will take it back to the dealership and tell them to fix it or they can buy it back. I am not seeing many new post about this problem, so what is going on is there a fix out there I have not been able to find

  25. wayoflife October 26th, 2007 11:22 am

    cd, my point was that if you do not have aftermarket adjustable control arms and an aftermarket adjustable front track bar, there is nothing you can adjust. You can address your ESP issues but you will need these parts to help get it fixed.

    Eddie

  26. cd thompson November 3rd, 2007 2:15 am

    i just got my accupro and i cant get it to work

  27. JR November 8th, 2007 2:13 pm

    Hi
    Is it Ok for a JK diesel 2,8l crd ?
    I m in France and it dont work
    Thanks
    JR

  28. wayoflife November 9th, 2007 1:28 pm

    According to Hypertec, the manufacturer of this unit, it will only work on 3.8L Rubicon and Sahara’s - not X’s and not on a 2.8L CRD.

    Eddie

  29. Lothos November 30th, 2007 9:31 am

    Have they implemented a VIN lock on the device yet to keep you from using it on multiple vehicles?

  30. cd thompson December 17th, 2007 12:10 pm

    yes they have

  31. k5oscar December 19th, 2007 10:24 pm

    I went out and bought the Accu-Pro, and when I hooked it to my JK Unlimited I had DTC code P0035. Everything I found on this code ha to do with “P0035 Turbo Charger Bypass Valve Control Circuit High” any ideas why? The programming was successful and I put the new tire diameter in, it just bothers me that a brand new 2008 JK would have that code.

  32. Dan January 20th, 2008 5:31 pm

    Can anyone tell me why this wouldnt work on an “X” model?? My 2008 “X” has an OBDII diagnostics port, cruise control and an onboard computer that calculates DTE and MPG the same as a Rubi or Sahara does.

  33. wayoflife January 22nd, 2008 12:29 pm

    From what I understand, the X comes with a standard tire size that is smaller than the Sahara or Rubicon and for one reason or another, the computer programming is different because of it. I am told however that this problem should be fixed soon.

    Eddie

  34. Ron February 9th, 2008 2:03 am

    How can I reset the codes?

  35. wayoflife February 10th, 2008 11:40 am

    If your Accu Pro shows any DTC codes, it should give you the option to clear them.

    Eddie

  36. khalil March 25th, 2008 5:31 am

    Hello everybody, i have a Jeep wrangler - Sport 2008 , does this accu pro calibrator work for this car or only Rubicon or Sahara models? please advise

  37. wayoflife March 26th, 2008 9:40 am

    It should work for every JK now.

    Eddie

  38. Jack March 26th, 2008 2:43 pm

    I am planning on changing my gears from 3.73 to 4.10’s in my 2008 Sahara. I have stock tires and I am NOT planning on going to a larger tire size. Will I need to recalibrate my speedometer?

  39. wayoflife March 26th, 2008 4:23 pm

    Yes, you will but for what you are doing, you should be able to do this at your dealership.

  40. davidfjr April 15th, 2008 4:38 pm

    Does anyone know for sure if this now works on o8 unlimited x pkg?
    Thanks David

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