Key Programming Challenges And Opportunities

Key Programming Challenges And Opportunities

For most vehicles today, it's not so much about programming a new key to the car, but programming the car to the key.

Three situations might require key programming capabilities at your shop. First, being able to diagnose and program keys can be a tool as part of some no-start diagnostics. Second, you may run into a situation where a key or fob needs to be reprogrammed to the vehicle if a module was replaced. Third, a customer might want an extra key, or all the original keys were lost.

You might think that key programming is a job for a locksmith or specialist, but the market is changing. Brick and mortar locksmith and dealership parts departments can cut key blanks, but it is up to you to make them work with the vehicle. In the case of some proximity keys, there is no key to cut – it is all up to you.

For most vehicles at your shop, it is not as much about programming a key to the car, but programming the car to the new key. Programming a vehicle to the key might require a procedure to put the vehicle into a learn mode; this is typically called “onboard” programming.

Newer vehicles require a scan tool to learn a new key or remote to perform onboard programming. You might already do this at your shop if you have the right scan tool and software.

Onboard procedures use the antenna coil on the vehicle to read the transponder or ID number in the new key or remote. The vehicle gets the key’s transponder to transmit, and the unique ID is learned by the vehicle during the procedure.  

PIN CODES

One of the changes made to some late-model vehicles is the requirement to have a three- or four-digit PIN code to perform onboard programming. This code resides in the module for the immobilizer system. 

You can contact the OEM for the code, or, in some cases, it might be found in the owner’s manual if you are lucky. But, some key programming tools can harvest the PIN code from the modules. VW and other makes require PIN codes, depending on specific model years.

PROGRAMMING KEYS

To increase security, some OEMs are requiring the key to transmit more than just the ID code. VW and other European manufacturers are requiring that the key transmits the unique VIN of the vehicle. Specialty key programming tools can program the transponder code and VIN onto a key.  

REFLASHING AND REPROGRAMMING

Data can go both ways when it comes to some key programming tools. Information from a key can be programmed into a module, or information from an existing model can be programmed onto a key. This tool function can save you if a module has been replaced or reflashed and the key information is lost. It is also helpful if you are in a situation where all the keys have been lost. 

For situations like this, you have several options. Some key programming tools and vehicles will allow you to clone key transponders in the memory of the vehicle. The key programming tool communicates with the vehicle to find the information about the existing keys, and then burns that code to a new transponder using a specialized attachment for the key. It may call for reflashing completely new transponder codes to a module. For some cars, this can be performed through a J2534 interface. Other cases may require the module or EEPROM chip to be removed for reprogramming.  Specialized key programming tools let you do it at your shop. 

The key and fob for modern vehicles are more than a key. They can start a vehicle remotely, open a rear hatch with a swipe of a foot, and make sure the vehicle is secure against physical and virtual attacks. If you are already servicing these vehicles, you can’t avoid key programming.

You May Also Like

Build A Winning Culture By Allowing Failure

Yes, strive for victory, but great shops know that solid training moments come by learning from mistakes.

Courtesy of ShopOwner by David Rogers

If we accept that the technician shortage is here to stay, what comes next?

I’ve used these pages to talk about technician compensation and how top techs deserve the chance to earn compensation on par with their professionalism and dedication. I’ve also talked about tools that create more efficiency and productivity, and how it’s the responsibility of every owner to invest in the tools that techs need to maximize their billable hours.

Scan Tool Tech

While systems can and will differ, here’s a look at common ADAS features, their general configurations and calibration requirements.

scan tool tech
Clutch “No Release” Problems

Poor clutch release makes it difficult to start and stop the vehicle or change gears.

Fine-Tuning Your Wheel Balancing Process

The first step to a smooth ride and well-balanced tire has nothing to do with the balancer.

Upgrade Your Air System: It’s Easier Than You Think

Improving your shop airflow is only a benefit, unless you like to spend more time, work harder and make less money.

air flow tubes
Other Posts
Why ECU Reflashing Needs Certain Power Levels

A reflash power supply is not designed to jumpstart the vehicle.

Mercedes EQS Service Opportunities

EQ is the EV brand for Mercedes. It is the equivalent of Audi’s Etron or VW’s iD brands.

View the TechShop Buyer’s Guide Today

With the instant power of the internet, a complete list of tool manufacturers and company information is at your fingertips.

Tool button on a keyboard
Impact Wrench Technology

Interchangeable anvils are a feature on some new impacts.