Practice Test Geeks(CAL) Certified Automotive Locksmith Practice Test
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Transponder and Immobilizer Systems Flashcards

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  1. What is the key difference between a 'pre-coded' and 'after-market' transponder key?

    Answer: Pre-coded keys come with the transponder already programmed to a specific vehicle

    Pre-coded transponder keys are programmed at the factory or dealer for a specific vehicle, whereas aftermarket keys are blank chips that require programming on-site.

  2. A locksmith encounters a Toyota 4Runner that uses a 'Smart Key' system. What technology allows the vehicle to detect the key without inserting it?

    Answer: Passive low-frequency (LF) field detection with UHF response

    Toyota's Smart Key uses low-frequency (LF) antennas around the vehicle to wake the key fob, which responds via UHF (315/433 MHz), enabling passive entry and push-button start.

  3. When programming keys on a GM vehicle using the '10-minute relearn' procedure, what must the locksmith do?

    Answer: Insert each new key and hold until the security light goes out for each key, repeating for all keys

    GM's 10-minute relearn requires inserting each new key, waiting for the security light to extinguish (approximately 10 minutes per key), confirming the PASSLOCK system learns the new key.

  4. Which component stores the vehicle's list of authorized transponder IDs in most modern immobilizer systems?

    Answer: The instrument cluster non-volatile memory or immobilizer ECU EEPROM

    The immobilizer ECU or instrument cluster stores all authorized transponder IDs in EEPROM or other non-volatile memory, which persists even when power is removed.

  5. A technician is programming a proximity key fob for a Honda and needs to synchronize the RF portion. What is the correct first step?

    Answer: Connect to OBD-II and use a diagnostic tool to initiate remote fob sync

    For Honda proximity key fobs, the RF synchronization is typically performed through an OBD-II diagnostic procedure rather than a manual button sequence.

  6. What does 'TPMS' stand for, and why is it relevant to automotive locksmiths working with smart key systems?

    Answer: Tire Pressure Monitoring System; some TPMS sensors share the 315/433 MHz frequency with key fobs

    TPMS sensors operate on the same 315 or 433 MHz frequency as many key fobs, and locksmiths must be aware to avoid interference when diagnosing RF key communication issues.

  7. In which scenario would a locksmith most likely use a 'key simulator' or 'transponder emulator' tool?

    Answer: To test whether the immobilizer antenna and ECU are functioning before cutting a new key

    A transponder emulator simulates a known-good transponder signal, allowing the locksmith to confirm the vehicle's antenna ring and immobilizer ECU are operational before committing to key programming.