Lexus NX: Power Source & Network

 Entry Exterior Alarm and Answer-back Buzzer do not Sound

DESCRIPTION The smart access system with push-button start (for Entry Function) uses the wireless door lock buzzer to perform various vehicle exterior warnings. When the conditions of each warning are met, the certification ECU (smart key ECU assembly) sends a buzzer activation request signal to the

 Reverse Signal Circuit between Radio Receiver Assembly and Navigation ECU

DESCRIPTION This circuit includes the navigation ECU and radio and display receiver assembly. WIRING DIAGRAM PROCEDURE 1. CHECK HARNESS AND CONNECTOR (RADIO RECEIVER ASSEMBLY - NAVIGATION ECU) (a) Disconnect the I153 radio receiver assembly connector. (b) Disconnect the I173 navigation ECU