Unlock Warning Switch Circuit

KEY CONFINEMENT PREVENTION FUNCTION DOES NOT WORK PROPERLY (UNLOCK WARNING SWITCH CIRCUIT)

CIRCUIT DESCRIPTION

The transponder ECU senses, by the unlock warning switch, that the key is in the key cylinder, and transmits it as a signal to the theft warning ECU multiply. When the door is locked with the ignition switch OFF and the key in the key cylinder, the theft warning ECU transmits the LOCK signal. Then the UNLOCK signal is sent to the multiplex network door ECU front LH and RH. After those operations, the multiplex network door ECU front LH and RH drive the door lock motor.

Wiring Diagram:

Step 1:

Step 2:

INSPECTION PROCEDURE