Practice Test Geeks(CAL) Certified Automotive Locksmith Practice Test
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Key Programming and Remotes Flashcards

7 cards from real CAL practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. What does 'key on board' (KOB) programming mean when using an aftermarket key programmer?

    Answer: The existing working key must be present and turned to the ON position to authorize programming of a new key

    KOB (also called 'key present' mode) requires at least one working key to be in the ignition to authenticate the session before additional keys can be added.

  2. A 2016 Dodge RAM owner needs a new smart key. After programming via OBD, the fob works but the remote start function does not. What is the most likely cause?

    Answer: Remote start is a separately installed aftermarket system that requires its own bypass programming

    Factory OEM remote start on RAM trucks is linked to the fob, but many RAMs have aftermarket remote start systems that require their own transponder bypass to be programmed separately.

  3. What is the significance of the 'seed and key' algorithm in automotive security systems?

    Answer: It is a two-step challenge-response protocol where the ECU sends a random seed and the tool must return the correct computed response to gain programming access

    Seed-key (also Security Access in UDS/ISO 14229) requires the diagnostic tool to pass a cryptographic challenge before the ECU unlocks protected functions like key programming.

  4. Which of the following best describes the difference between 'cloning' a transponder and 'programming' a transponder?

    Answer: Cloning copies an existing chip's ID to a new blank without vehicle communication; programming writes a new key ID into the vehicle's memory via OBD or EEPROM

    Cloning duplicates the original transponder data onto a compatible blank, requiring no vehicle interface; programming registers a new unique transponder ID into the vehicle's immobilizer.

  5. A locksmith uses an AUTEL IM608 to program a Mercedes-Benz smart key but receives an 'EIS/EZS not responding' error. What does EIS/EZS stand for and what should the technician check first?

    Answer: Electronic Ignition Switch / Electronic Central Switch — check for a blown fuse or damaged wiring to the EIS module under the steering column

    The EIS (Electronic Ignition Switch) / EZS (Elektronisches Zündschloss) is the Mercedes immobilizer module; a no-communication fault typically means a fuse, wiring issue, or damaged module at the steering column.

  6. What is the purpose of the 'pin code read' function found on many advanced key programmers when working on a lost-key scenario?

    Answer: It reads the vehicle's 4- or 5-digit security PIN from the ECU or EEPROM so the locksmith can authorize key programming without needing a working key

    Many OEM systems protect key programming behind a numeric PIN; advanced tools can extract this PIN from the vehicle's ECU memory, enabling AKL key programming without dealer involvement.

  7. When programming remote keyless entry (RKE) on a GM vehicle using the 'RPO code' method, what does RPO stand for and why is it relevant?

    Answer: Regular Production Option — RPO codes identify which RKE system (e.g., DEF, AU3) is installed so the correct programming procedure and fob part number can be selected

    GM's RPO (Regular Production Option) codes, found on the service parts ID label in the glove box, identify factory-installed options including the specific RKE variant, ensuring the correct fob and procedure are used.