CAL Transponder and Immobilizer Systems 2

Question 1

What does the term 'cloning' mean in the context of automotive transponder keys?

Accepted Answer

Duplicating the transponder's stored data onto a blank chip

Answer

Cloning copies the transponder's crypto ID or fixed code from an original chip to a compatible blank chip, allowing the new key to start the vehicle.

Question 2

Which transponder type is commonly referred to as a 'glass chip' due to its packaging?

Accepted Answer

Texas Instruments TI DST

Answer

Texas Instruments DST (Digital Signature Transponder) chips are often encased in glass cylinders and are widely found in Ford and other vehicles.

Question 3

What is the primary purpose of the antenna ring surrounding the ignition cylinder?

Accepted Answer

To energize and communicate with the transponder chip

Answer

The antenna ring creates an electromagnetic field that inductively powers and reads the transponder chip inside the key.

Question 4

A customer's vehicle starts with the original key but not the newly programmed key. The most likely cause is:

Accepted Answer

The transponder data was not successfully written to the new key

Answer

If the blade cut is correct but the car won't start, the transponder chip was likely not properly programmed or cloned.

Question 5

Which of the following best describes a 'rolling code' transponder system?

Accepted Answer

A system where the crypto value changes with each use

Answer

Rolling code (or hopping code) systems generate a new cryptographic challenge-response pair each ignition cycle, making replay attacks ineffective.

(CAL) Certified Automotive Locksmith Practice Test