Ecm Software Update

Most 2002 and later Honda and Acura vehicles have reprogrammable PCM's, ECM's, and ECU's. NOTE: Whenever you install a new programmable control unit or module, you must update it. Sep 29, 2011 Dealer did a software update (Campaign 23H3) to the ECM in my 2010 Q7 3.0 TDI yesterday. Since then, the fuel mileage as shown in the cluster has dropped significantly. In 25k miles, I normally average around 20-21 mpg in town driving. Since the update, I am averaging around 17 mpg. Jan 09, 2014 Just want to show the procedure and what is involved in updating the pcm to the latest level. Many customers are now falling outside of even the emission warranty that would pay for this. How to reprogram your engine computer. Posted by Bryan. The ECM is flashed with the new software direct from the manufacturer’s website. Consult with your vehicle manufacturer’s website for software updates. Download the update into a flash programming device. Additional software for proper engine tuning may be necessary.

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Everyone with a smartphone or a computer knows all about the update process. There are updates for Windows, updates for OS X, updates for your applications, uploads for the games and apps on your phone…the list goes on. But the computers on your desktop or in your pocket aren’t the only computers you own – if you have a car or truck made in the last twenty or thirty years, you’ve almost certainly got computers in your vehicle. Onboard computers handle emissions control, fuel injection, performance balancing, and a host of other functions in your car or truck. And guess what? Those computers run on software, and that software gets periodically updated by the manufacturer.

If you have a General Motors vehicle, you’ve had onboard computers for quite a long time. GM first put computers, known as ‘Powertrain Control Modules’ (PCMs) since the 1990 Geo Storm was rolled out. (Why they chose the Storm rather than a Cadillac to introduce this new technology is anyone’s guess.) The PCM is a programmable module that handles all kinds of things for your vehicle.

For GM cars or trucks made in 1996 or later, you can easily check to see if there are available updates for your vehicle’s PCM at https://tis2web.service.gm.com/tis2web/. Checking is absolutely free; all you need is your VIN.

How to use the website:

Enter your VIN and click the “Get CAL ID” button.
From the next screen select “PCM/VCM Powertrain/Vehicle Control Module”, then click the Next button at the bottom right.

You will see any available updates for your GM vehicle. Each choice next to “Module:” is clickable. You only have to click once on each section to see what updates are there.

If you like, you can print out the pages, bring it to the dealership and have the updates applied. Cost varies greatly depending on what needs to be updated.

Can you apply these updates yourself?

Yes, in theory, but it’s not recommended. While it’s true all you need is a laptop and an OBD-II connector cable, you will need to acquire the update and use special expensive software. Furthermore, if you fail to update properly, the vehicle will literally not start.

Updates of this type are best left to the dealership.

The powertrain control module (PCM) in your vehicle is the main computer controlling its various operating systems. For example, the PCM controls the engine, the transmission, the fuel system, and the speedometer. If the vehicle isn’t performing the way it should, the PCM can be reprogrammed to increase performance. Recalls are another reason your PCM may need to be reprogrammed. Since Chevrolet is a subsidiary of General Motors (GM), GM tools and software are used to reprogram a Chevrolet PCM.

Step 1

Use your web browser to go to GM’s calibration look-up website, and type in your vehicle’s VIN number to check for any programming updates to your PCM. If there are updates, you will need to purchase GM’s techline information system (TIS) programming software and service.

Step 2

Turn on your computer and plug the scan tool into it and your vehicle, using the pass-through cable. Turn on the scan tool and load the TIS programming software from GM on your computer.

Step 3

Click the “Service Programming System” option on the main screen of your TIS software on your computer. The “Select Diagnostic Tool and Programming Process” window will appear on your screen.

Step 4

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Click on the “Pass-Thru” option under diagnostic tool, “Reprogram ECU” under select programming process, and “Vehicle” under ECU location. Click the “Next” button in the lower-right hand section of the window to proceed.

Step 5

Enter the VIN number in the VIN text box in the “Determine Vehicle” window, and click on “Apply” next to the text box. This will fill in your vehicle’s data in the boxes below. Click the “Next” button to proceed.

Step 6

Go through the checklist in the “Preparing for Communication” window, and click next to confirm your VIN number. If your VIN number is incorrect, enter the correct one. Click “Next” in the bottom-right corner.

Step 7

Click on the “PCM/VCM” selection under the “Select Controller” section of the next window. Select “Normal” under programming type and click the “Next” button.

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Step 8

Select the newest calibrations for each system in the “Calibration Selection” window by clicking on each system’s tab, and putting a check mark next to the highest number of calibration. Click the “Next” button in the bottom-right corner of the window after every tab has a green check mark on it.

Step 9

Click “Next” at the summary screen after verifying your recalibrations. If all of your calibrations are up-to-date, an error will appear indicating there is nothing to reprogram. If they are not up-to-date, a transfer window will open and the program will begin to download and reprogram your PCM with the calibrations you selected.