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All Prius models include five or more reprogrammable Steering Wheel Control (SWC) buttons that can control a standard compabible (multimedia/navigation/radio) Head Unit (HU).

This section is a community-built list describing how the various OEM and third party head units respond to the available SWC signals. (Very little such information is available elsewhere) Through experimentation you can discover the information for your own head unit and add it to the list!

SWC Interface: Metra ASWC // HU: Sony 660BT/770BTEdit

Default Button Assignment: 2,1 // 5 // 4,3

Signal Effect on HU
1. Volume Up Volume Up
2: Volume Down Volume Down
3: Seek Up/Next Seek Up/Next
4: Seek Down/Prev Seek Down/Prev
5: Source/Mode Source/Mode
6: Mute ATTenuate on/off (quiets the sound)
7: Preset Up

Tuner: Preset Up (within Band-Set eg AM1-AM2, FM1-2-3);
iPod: Next Album, Genre, Playlist;
Other modes: No function

8: Preset Dn Down/Previous in same pattern as Preset Up
9: Power Toggle OFF (Short: Audio Off; Long: Power Off)
10: Band Tuner: Band, others: No Function
11: Play/Enter No Function
12: Push To Talk No Function
13: Phone On Hook OFF (Short: Audio Off; Long: Power Off)
14: Phone Off Hook No Function
15: Fan Up No Function
16: Fan Dn No Function
17: Temp Up No Function
18: Temp Dn No Function

Note: my favorite setup is 2, 1 // 10 // 8, 7 ie center button for Band, bottom buttons for next/prev preset.

SWC Interface: Metra RFASWC // HU: Alpine W404 with BT interfaceEdit

Default Button Assignment: up/dn= 2, 1 (volume); lf/rt = 4, 3 (seek); center = 5 (source); back = N/A; red/green = N/A

Signal Effect on HU
1. Volume Up Volume Up
2: Volume Down Volume Down
3: Seek Up/Next Seek Up/Next
4: Seek Down/Prev Seek Down/Prev
5: Source/Mode Source/Mode
6: Mute Mute on/off (lowers sound level to almost zero)
7: Preset Up

Tuner: Preset Up (within individual Band eg AM1, FM1, FM2);
iPod: No function?;
Other modes: No function

8: Preset Dn Down/Previous in same pattern as Preset Up
9: Power Toggle Power Toggle (Power on/off)
10: Band Tuner: Band, others: No Function
11: Play/Enter iPod: Play/Pause toggle, others: No Function
12: Push To Talk No Function
13: Phone On Hook No Function
14: Phone Off Hook No Function
15: Fan Up No Function
16: Fan Dn No Function
17: Temp Up No Function
18: Temp Dn No Function

Note: my favorite RFASWC setup for the W404 is up/dn= 2, 1 (volume); lf/rt = 4, 3 (seek); center = 11 (Play/Pause); back = 9 (Power);red/green = 8, 7 (Preset)

Add Another HereEdit

(copy format from a previous section)

Add Another HereEdit

(copy format from a previous section)

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