Signal specification, control module for rear audio separation (RAS)
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2006 Volvo S80, 2005 Volvo S80, 2004 Volvo S80, 2003 Volvo S80, and 2002 Volvo S80. However, it is still accessible from the selected car via links, so may be relevant.
| U= | DC voltage in volts (V) | UAC = | AC voltage in volts (V) |
| Ubat = | Battery voltage (V) | f = | Frequency in Hertz (Hz) |
| Ulow = | Voltage approximately 0 V | t = | Time in seconds |
| PWM = | Pulse-width modulated signal in % |
Rear audio separation module (RAS).
Signal table
| Terminal | Signal type | Ignition on | Cable or signal information |
|---|---|---|---|
| #A1 | Battery voltage supply | Ubat | - |
| #A2 | Right audio (out), sound channel 2 | - | Headset signal channel 2, low level audio |
| #A3 | Left audio (out), sound channel 2 | - | Headset signal channel 2, low level audio |
| #A4 | 15-feed | Ubat | - |
| #A5 | Left audio (out), sound channel 1 | - | Headset signal channel 1, low level audio |
| #A6 | Right audio (out), sound channel 1 | - | Headset signal channel 1, low level audio |
| #A7 | - | - | - |
| #A8 | Loudspeaker signal left-hand (L-) | U=Ulow | Rear loudspeakers, high level audio |
| #A9 | Loudspeaker signal left-hand (R-) | - | Rear loudspeakers, high level audio |
| #A10 | Loudspeaker signal left-hand (R+) | - | Rear loudspeakers, high level audio |
| #A11 | Loudspeaker signal left-hand (L+) | - | Rear loudspeakers, high level audio |
| #A12 | Incoming loudspeaker sound (L+) | - | The control module for audio separation (RAS) receives sound from the standard system and processes the sound. |
| #A13 | Ground supply | Ulow | - |
| #A14 | - | - | - |
| #A15 | Audio ground | - | - |
| #A16 | - | - | - |
| #A17 | - | - | - |
| #A18 | Channel selector ground | 0 V = no signal at all 5 V = sound for the left screen in the speaker (master) 7.5 V = sound for the right screen in the speaker (master) |
The sound for the left-hand passenger position is always in the left-hand headset and vice-versa |
| #A19 | - | - | - |
| #A20 | - | - | - |
| #A21 | Incoming loudspeaker sound (R-) | Alternating voltage at sound in instrument panel speaker | The control module for rear audio separation (RAS) receives sound from the standard system and processes the sound. |
| #A22 | Incoming loudspeaker sound (R+) | - | The control module for rear audio separation (RAS) receives sound from the standard system and processes the sound. |
| #A23 | Incoming loudspeaker sound (L-) | - | The control module for rear audio separation (RAS) receives sound from the standard system and processes the sound. |
| #A24 | - | - | - |
Signal table
| Terminal | Signal type | Ignition on | Cable type or description |
|---|---|---|---|
| #B1 | Supply IR | 5 V | IR transmitter headset |
| #B2 | IR audio Hi | Low level | Twisted |
| #B3 | IR audio Lo | Low level | Twisted |
| #B4 | Ground | Ulow | - |