Immobilizer Key Mismatched
Table of contents
P1696 HYUNDAI Possible Causes
- Faulty Smart key ECM
How do I fix code P1696 HYUNDAI?
Check the “Possible Causes” listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector’s pins.
Cost of diagnosing the P1696 HYUNDAI code
The cost of diagnosing the P1696 HYUNDAI code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1696 HYUNDAI Description
Smart key System consists of transponder, which is in the FOB key head, and Smart key ECM. Smart Key System has FOB holder, which includes antenna coil, to communicate with transponder for immobilizer communication.
Smart Key ECM communicates with PDM via serial communication line so that Smart Key ECM sends signal to PDM.
FOB is requested authentication from Smart Key ECM by using the LF antenna with LF communication. And then, FOB sends authentication signal through the SRx with RF communication.
With this procedure, Smart Key ECM sends authentication signal to Engine ECM in order to allow the engine start.
Authentication for immobilizer is classified two different way. one is pre- authentication and the other is general authentication.
Regardless of success or failure, Pre-authentication makes Immoblizer lamp remains OFF. However, General authentication makes Immobilizer lamp is ON for 30 seconds If authentication is successful. However, if authentication is failed, Immobilizer lamp is OFF for 10 seconds.