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Dumb Key

This bulletin applies to 2014 Infiniti Q70 vehicles equipped with an intelligent key where the key is not detected and the engine will not start.

Intelligent key systems use two different radio frequencies (RF) that are similar to other wireless devices: 315 MHz and 433 MHz.

In the event another wireless device, such as an aftermarket alarm system, is transmitting at the same time as an intelligent key, it can interfere with the intelligent key signals being received by the BCM. This can result in no response when the Stop/Start button is pressed (engine will not start), “I-Key System Error” displayed in the instrument panel, “No I-Key Detected” displayed, intermittent operation of the buttons on the remote key FOB, or intermittent operation of the door request switches. These symptoms are usually intermittent and can be difficult to diagnose.

Use Signal Tech II KEY Battery Test to confirm battery state of charge. If the model is not supported by Signal Tech II, refer to the appropriate ESM, section “Door & Lock” for proper battery voltage testing procedure.

An intelligent key should not be stored where the RF signal can be obstructed by nearby metal objects. Confirm that the intelligent key is not placed in close proximity to phones, other intelligent keys, highway PASS card, USB charge, personal computer charger, etc. that may be transmitting similar RF signals. The technician should remove all devices from the vehicle while diagnosing/duplicating the customer issue.

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