How to apply the self-diagnostic functions (with Navigation) Turn the ignition switch to ACC (I) or ON (II). While holding down the up of both ''CH DISK'' and ''SEEK SKIP'' buttons simultaneously, press the power switch. The following BUS communication DTC will appear on the Navigation subdisplay.
By turning on a switch while the DTC is displayed, the input will trigger the DTC mode that is assigned to that switch. AM/FM switch Entire LCD lighting mode: Lighting the entire LCD to show the presence or absence of an LCD failure. CD/AUX switch Entire LCD light-out mode: Turning off the entire LCD to show the presence or absence of an LCD failure. SEEK SKIP switch Display IS-BUS communication verification status: To display the validity verification of the communication between the climate control unit and Navigation-DISP. SEEK SKIP switch Display 12C-BUS communication verification status: To display the validity verification of the communication among the DISP, EEPROM and TUNER. DTC mode will cancel when the audio main power switch is turned OFF or the ignition switch is turned OFF.