BE–160 BODY ELECTRICAL SYSTEM – THEFT DETERRENT AND DOOR LOCK CONTROL SYSTEM Key Unlock Warning Switch Circuit CIRCUIT DESCRIPTION The key unlock warning switch goes on when the ignition key is inserted in the key cylinder and goes off when the ignition key is removed. The ECU operates the key confinement prevention function while the key unlock warning switch is on. WIRING DIAGRAM T9 Theft Deterrent and Door Lock ECU 12 V Key Unlock Warning Switch 1 12 1J 1K W-B 1 2 Y 11 Y KSW IF1 20 W-B E N09871