DTC B1242: Wireless Door Lock Tuner Circuit Malfunction [10/2022 - 10/2023]: Description

The door control receiver receives a signal from the electrical key transmitter sub-assembly and sends signals to the main body ECU (multiplex network body ECU) through the certification ECU (smart key ECU assembly) via CAN communication system. The certification ECU (smart key ECU assembly) sends door lock/unlock commands to the main body ECU (multiplex network body ECU).

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B1242	Wireless Door Lock Tuner Circuit Malfunction	One of the following conditions is met: Short in RDAM between the certification ECU (smart key ECU assembly) and door control receiver. Short in RCO between the certification ECU (smart key ECU assembly) and door control receiver.	Door control receiver Certification ECU (smart key ECU assembly) Harness or connector