Wireless Door Lock Control System

DTC B1242 Wireless Door Lock Tuner Circuit Malfunction

DESCRIPTION

DTC Detection Condition:

- The electrical key antenna is used to receive electric waves relating to the entry functions of the smart access system with push-button start. The certification ECU decodes the requested smart access system with push-button start operation by identifying a key code based on electric waves received via the electrical key antenna and the door control receiver.
- The door control receiver receives a signal from the wireless door control transmitter and sends signals to the main body ECU RH through the certification ECU.
- The certification ECU then sends a command, according to the requested operation, to each ECU. (e.g. If door lock operation is requested, the ECU sends a door lock command to the main body ECU RH.)

Wiring Diagram:

Step 1-2:

Step 2 (Continued)-3:

INSPECTION PROCEDURE