Main Unit Inputs, Outputs, Power Supply and Ground

Main Unit Inputs









- Power supply (+15 circuit) (20)
- Power supply (+30 circuit) (1)
- Ground (G34P/G33P)
- Antenna signal HF (265)
- CD changer, line input right channel +/- (355)
- CD changer, line input left channel +/- (355)

Main Unit Inputs, Bus

Main Unit Inputs, Bus:

- Ignition +B (on/off) from DICE (628)
- CD changer information from CD changer (355)
- Vehicle speed (km/h, mph) from MIU (540)
- Rheostat value (0-100%) from SID (541)
- Rheostat Night Panel (0-100%) from SID (541)
- Night Panel (on/off) from SID (541)
- Display lighting (0-100%) from SID (541)
- Steering wheel controls from SID (541)
- Key correct from TWICE (632)
- Diagnostics communication, see Bus and Diagnostics Communication. Testing and Inspection

Main Unit Outputs









- Trigger voltage, electric antenna (265)
- Mute control, external amplifier (354)
- Line output external amplifier, right channel +/- (354)
- Line output external amplifier, left channel +/- (354)
- Loudspeaker, right channel +/-, front (266F)
- Loudspeaker, left channel +/-, front (266F)
- Loudspeaker, right channel +/-, rear (266R)
- Loudspeaker, left channel +/-, rear (266R)

Main Unit Outputs, Bus

Control Module Inputs, Bus:

- Time RDS (hours, minutes, seconds) used by SID (541)
- Date RDS (0 - 31) used by SID (541)
- Month RDS (Jan - Dec) used by SID (541)
- Sound (acoustic information) used by SID (541)
- Text messages (text information for main unit) used by SID (541)
- CD changer control used by CD changer (355)
- Diagnostics communication, see Bus and Diagnostics Communication.
Testing and Inspection

Main Unit Power Supply

Main unit power supply:

Power supply (+15 circuit)
From fuse 24 to the main unit, pin 4(A).

Power supply (+30 circuit)
From fuse 13 to the main unit, pin 7(A).

Main Unit Ground

Main unit ground:

Ground connection
The main unit is grounded (main ground) to grounding point G34P via pin 8(A).