CAL - Certified Automotive Locksmith Key Programming and Remotes Questions and Answers

Question 1

A customer has an 'All Keys Lost' (AKL) situation for a 2018 vehicle with a push-to-start ignition. Which of the following is the most critical first step for the locksmith to perform on-site?

Accepted Answer

Establish communication with the vehicle's ECU/immobilizer via the OBD-II port.

Answer

In an All Keys Lost (AKL) scenario for a modern vehicle, the primary challenge is electronic, not mechanical. The locksmith must first connect a specialized programming tool to the On-Board Diagnostics (OBD-II) port to communicate with the car's computer, access the immobilizer system, and prepare it to accept a new key. Cutting the blade is a necessary step, but it is useless without successful electronic programming. Cloning is not possible without an original key, and disassembling the dash is a last resort, not a first step.

Question 2

When programming an additional transponder key for a vehicle that already has two working keys, what is a common procedure for many older Ford, Chrysler, and GM models?

Accepted Answer

An onboard programming sequence involving cycling the ignition with existing keys.

Answer

Many older domestic vehicles (often pre-mid-2010s) feature an onboard, self-programming procedure that allows the owner or a locksmith to add a new key without specialized diagnostic tools, provided they have two existing, unique programmed keys. This process typically involves a specific sequence of inserting the old keys and the new key into the ignition and turning it to the 'On' position.

Question 3

Which of the following best describes the difference between 'cloning' a transponder key and 'programming' a new key?

Accepted Answer

Cloning creates an exact copy of an existing key's electronic signature, making it indistinguishable to the vehicle, whereas programming adds a new, unique key to the vehicle's memory.

Answer

Cloning involves reading the data from a working transponder chip and writing it onto a new, cloneable chip. The vehicle sees both the original and the cloned key as the exact same key. Programming, on the other hand, is the process of introducing a new, unique transponder key to the vehicle's immobilizer system through the OBD-II port, which then registers it as a distinct, additional key in its memory.

Question 4

A locksmith is attempting an 'All Keys Lost' procedure on a Toyota with a smart key system. The programming tool repeatedly fails, citing a security error. What is a plausible, often-overlooked cause for this failure?

Accepted Answer

An original 'lost' key is inside the vehicle, interfering with the reset process.

Answer

Some vehicle security systems, particularly in brands like Toyota, are designed to prevent an immobilizer reset if a valid key is detected inside the car. If the owner's 'lost' key has fallen under a seat or is otherwise inside the vehicle, the low-frequency antennas will detect it. The system interprets this as a theft attempt rather than a legitimate AKL situation and will terminate the programming procedure to protect the vehicle.

Question 5

When preparing to program a new remote key fob, why is it crucial to have ALL existing and new fobs present before starting the procedure?

Accepted Answer

Most vehicle programming sequences start by erasing all previously stored remotes from memory.

Answer

During most onboard and diagnostic programming procedures for remote key fobs, one of the initial steps the vehicle's computer takes is to clear its memory of all previously paired remotes. Therefore, any existing, working remotes that are not reprogrammed during the same session as the new one will no longer function.

(CAL) Certified Automotive Locksmith Practice Test

(CAL) Certified Automotive Locksmith Practice Test

CAL - Certified Automotive Locksmith Key Programming and Remotes Questions and Answers