Power Source Mode does not Change to ON (IG and ACC) [08/2019 - ]: Description

When the engine switch cannot be turned on (ACC) or on (IG), there may be a malfunction in interior certification, or the ACC relay or IG relay system. If interior certification does not succeed, the certification ECU (smart key ECU assembly) may be malfunctioning, or communication may not be possible between the No. 1 indoor electrical key antenna assembly (front floor) or No. 2 indoor electrical key antenna assembly (rear floor), the electrical key transmitter sub-assembly, and the door control receiver.

When the electrical key transmitter sub-assembly is brought into the cabin, the key ID code sent from the electrical key transmitter sub-assembly and the key ID code stored in the certification ECU (smart key ECU assembly) are certified. If these codes do not match and certification fails, the engine switch cannot be turned on (ACC) or on (IG).

When the door is unlocked and the electrical key transmitter sub-assembly is brought into the cabin, the certification ECU (smart key ECU assembly) activates the indoor electrical key antenna and forms a detection area. When the electrical key transmitter sub-assembly is recognized inside the detection area, it returns the key ID code. This is received by the door control receiver, which then sends it to the certification ECU (smart key ECU assembly).