Room Oscillator does not Recognize Key: Description

WARNING: This page is about a different car, the 2010 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.

If the entry ignition function does not operate, place the key in the vehicle and check whether the engine control system starts. If the engine control system starts (the ID code box outputs a start permission signal to the engine control system and the engine control system starts), it can be assumed that only the entry ignition system is malfunctioning.

The certification ECU uses the indoor electrical key oscillator to send a request signal to the key when: 1) the driver side door is opened and closed, or 2) the engine switch is turned from on (IG) to off or off to on (IG). Then, the key transmits its ID code to the door control receiver. The ID code, which is then sent to the certification ECU, is verified by the certification ECU and the verification result is sent to the ID code box. Turning the engine switch from on (IG) to off stops the engine control system.

The ID code box and the certification ECU communicate encryption codes to each other using the LIN communication line. When the return code from the certification ECU matches the ID code in the memory, the ID code box sends an engine control system start permission signal to the ECM. With the brake pedal depressed, pressing the engine switch starts the engine. With the engine running, pressing the engine switch stops engine.