Smart Key System

DTC B1242 WIRELESS DOOR LOCK TUNER CIRCUIT MALFUNCTION

CIRCUIT DESCRIPTION

DTC Detecting Condition:

- The tuner and the Luggage Compartment tuner are used as antennas for the entry and wireless door lock functions of the smart key system.
- The certification ECU decodes the requested smart key system operation by identifying a key code based on electric waves received via the tuner and the Luggage Compartment tuner. The 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 body ECU.)

Wiring Diagram:

Step 1:

Step 2:

Step 3-5:

INSPECTION PROCEDURE