Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC P1696: Immobilizer-Authentication Fail: General Description
The smart key system is totally composed of a smart key mode, a power distribute mode, an external receiver and a smart key holder. The SMK 2.5, the smartkey system which has not Fob holder, is embed with a Demodulator. So the two Immo coil lines are connected this SSB. Smart key units sends a certified signal to the PCM through this process and then takes the engine to start by receiving the permission signal of engine start.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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