For 1990-2009 cars

### Radio Scan Tool Data Parameters

Parameter | Operating Conditions | Expected Value | Definition
--- | --- | --- | ---
Ignition is ON, engine OFF, and vehicle is stationary
Antenna |  | Main set |
Bass |  | Standard | The scan tool displays the current bass setting.
Battery Voltage | -- | 12 Volts | This displays volts. This is the voltage input supplied to the digital radio receiver.
CD Status | -- | OK |
CD Status |  | Valid | The scan tool displays Valid or Invalid
Invalid
CD Type |  | CD |
CD Changer Disc Number |  | 1-6 | This is the status of the CD changer.
Chime Mode |  | On | The scan tool displays On or OFF.
Off
Dial Type |  | Valid | The scan tool displays Valid or Invalid.
Invalid
Equalizer Boost |  | 0 |
Equalizer |  | On | The scan tool displays On or OFF.
Off
Internal Communication | -- | OK |
Mute | Mute button pressed | On | The scan tool displays if the audio unit mute button has been activated or deactivated.
Mute button depressed | Off
Navigation System | -- | Active |
-- | Inactive
Phone Active | -- | Active |
-- | Inactive
Power Mode | -- | Run | The scan tool displays Off, Accessory, Run or Crank Request. This is the state of the ignition switch.
Preset Status |  | 1 | The scan tool displays a preset number 1-6. This is the preset number when the radio is on a preset station.
Radio Button Stuck | -- | Yes | This displays if a radio button is stuck
-- | No
Radio Button |  | A/C Off |
Radio Button Status |  | Released |
Depressed
Singe CD Track Number |  | 1 | The scan tool displays the current track number on the CD.
Search Sensitivity Status |  | Auto |
Manual
Signal Strength | -- | Varies | This displays dBuV. This is the signal strength of the radio.
Speed Compensated Volume Curve |  | Zone 2 |
Source | -- | Tuner | This indicates the source of the audio signal currently being output.
Surround Sound Status | -- | On |
-- | Off
Surround Sound Status |  | Stereo |
Mono |
Treble |  | Standard | The scan tool displays the current treble setting.
Volume | 0 - 100% | User Dependent | The scan tool displays the current volume setting.

### Radio Scan Tool Output Controls

Parameter | Operating Conditions | Definition
--- | --- | ---
Ignition is ON, engine OFF, and vehicle is stationary
Audio Mute | Special Functions Output Control | The scan tool displays if the audio unit mute button has been activated or deactivated.
Left Front Speaker | Special Functions Front Speakers | The scan tool commands the speaker ON will turn OFF all speakers except this speaker. Commanding the speaker OFF will turn OFF all speakers.
Left Rear Speaker | Special Functions Rear Speakers | The scan tool commands the speaker ON will turn OFF all speakers except this speaker. Commanding the speaker OFF will turn OFF all speakers.
Right Front Speaker | Special Functions Front Speakers | The scan tool commands the speaker ON will turn OFF all speakers except this speaker. Commanding the speaker OFF will turn OFF all speakers.
Right Rear Speaker | Special Functions Rear Speakers | The scan tool commands the speaker ON will turn OFF all speakers except this speaker. Commanding the speaker OFF will turn OFF all speakers.