Automotive Locksmith Security & Anti-Theft Technologies Flashcards
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What is the primary security advantage of Volkswagen Group's MQB platform transponder system over older VAG immobilizers?
Answer: It uses AES-128 encryption with a challenge-response protocol that cannot be cloned with standard tools
MQB platform vehicles use AES-128 encryption in the transponder system, making standard cloning tools ineffective and requiring OBD-level programming.
A locksmith is using an OBD-II key programmer and receives a 'security access denied' error. What is the most likely cause?
Answer: The vehicle's BCM requires a valid dealer-level security code before accepting key programming commands
Most modern BCMs require a security access PIN to unlock key programming functions via OBD-II; without it, the module refuses the request.
What does 'PATS' stand for in Ford vehicle security systems?
Answer: Passive Anti-Theft System
PATS (Passive Anti-Theft System) is Ford's factory transponder-based immobilizer system introduced in the mid-1990s.
In the context of automotive security, what is a 'seed and key' exchange?
Answer: A diagnostic security protocol where the ECU sends a random seed value and the tool must return the correct calculated key to gain access
A seed-and-key exchange is a security handshake where the ECU provides a random challenge (seed) and the tool must compute the correct response (key) to unlock programming access.
When working on a vehicle with a Sentry Key Immobilizer System (SKIS), which manufacturer's vehicles are you most likely working on?
Answer: Chrysler/Dodge/Jeep (Stellantis)
SKIS (Sentry Key Immobilizer System) is Chrysler's OEM transponder immobilizer system used across Chrysler, Dodge, and Jeep vehicles.
What is the function of the 'transponder coil' located in a vehicle's ignition cylinder housing?
Answer: It powers and reads the transponder chip in the key via electromagnetic induction when the key is inserted
The ignition coil (antenna ring) uses electromagnetic induction to power and communicate with the passive transponder chip in the key head.
Which of the following best describes a 'smart key' system compared to a standard transponder key?
Answer: A smart key uses active RF communication for passive entry and push-button start without inserting the key, while a transponder key must be physically inserted
Smart key systems (PKE) allow entry and ignition without inserting the key by using active RF signals, unlike transponder keys that require physical insertion for the coil to read the chip.