Audio-HVAC Display Module Self-diagnostic Function

How to apply the self-diagnostic functions (without Navigation)

1. Turn the ignition switch to ACC (I) or ON (II).

1. While holding down the up of both ‘‘REW'' and ‘‘DISK+'' buttons simultaneously, press the power switch.

1. The following BUS communication DTC will appear on the audio unit display.

1. By turning on a switch while the DTC is displayed, the input will trigger the DTC mode that is assigned to that switch.
   PLAY/PROG switch
   Entire LCD lighting mode: Lighting the entire LCD to show the presence or absence of an LCD failure.
   NR switch
   Entire LCD lights-out mode: Turning off the entire LCD to show the presence or absence of an LCD failure.
   DISK+switch
   Display I2C-BUS communication verification status: To display the validity verification of the communication among the DISP, EEPROM and TUNER.

1. DTC mode will cancel when the audio main power switch is turned OFF or the ignition switch is turned OFF.

Display Specifications (without Navigation)

No. | Verification items | Verification results
--- | --- | ---
1 | Entire LCD lighting | ———
2 | Entire LCD lights-outs | ———
3 | I2C-BUS communication verification status | DSP communication OK
4 | DSP communication NG
5 | EEPROM communication OK
6 | EEPROM communication NG
7 | TUNER communication OK
8 | TUNER communication

Display Specifications