Multi-pin connector A, 8-pin, for loudspeaker outputs
| Pin |
Function |
| 1 |
Rear right loudspeaker, positive |
| 2 |
Front right loudspeaker, positive |
| 3 |
Front left loudspeaker, positive |
| 4 |
Rear left loudspeaker, positive |
| 5 |
Rear right loudspeaker, negative |
| 6 |
Front right loudspeaker, negative |
| 7 |
Front left loudspeaker, negative |
| 8 |
Rear left loudspeaker, negative |
Multi-pin connector A, 8-pin, for voltage supply lines and CAN bus
| Pin |
Function |
| 9 |
CAN bus, high |
| 10 |
CAN bus, low |
| 11 |
Telephone mute switch |
| 12 |
Voltage supply, negative, terminal 31 |
| 15 |
Voltage supply, positive, terminal 30 |
| 16 |
Anti-theft coding control signal, SAFE, positive |
Secure pin is not a turn on unit pin, it must have +12 always. You need a canbus signal to turn it on by key.
Multi-pin connector B, 12-pin, for CD changer control and CD audio input signals
| Pin |
Function |
| 1 |
Right headphone signal output, positive |
| 2 |
CD changer, left and right port, negative |
| 3 |
Headphone signal output, audio ground |
| 4 |
CD changer, voltage supply, positive, terminal 30, contact continuous load greater than 1 A, temporary peak load 5 A |
| 5 |
Left headphone signal output, positive |
| 6 |
CD changer, DATA OUT |
| 8 |
CD changer, left audio channel, CD/L |
| 9 |
CD changer, right audio channel, CD/R |
| 10 |
CD changer, control line, switched positive |
| 11 |
CD changer, DATA IN |
| 12 |
CD changer, CLOCK (internal check protocol for data flow monitoring) |
Multi-pin connector C, 12-pin, for telephone and microphone signals
| Pin |
Function |
| 6 |
Telephone audio input signal, negative |
| 12 |
Telephone audio input signal, positive |
Meaning of Head Unit pinout signals
Pin
Notation |
Pin function |
Power pins
|
| +UB |
Battery+ (12V direct from Battery). |
| GND, GROUND |
Chassis Ground |
| S-kont |
Ignition powered. +12 V with the ignition key is in the ACC or ON position. |
Audio pins
|
| FR+ or RF+ |
Front right speaker out |
| FL+ or LF+ |
Front left speaker out |
| RR+ |
Rear right speaker out |
| LR+ or RL+ |
Rear left speaker out |
| FR- or RF-, FL- or LF-, RR-, LR- or RL-, SGND |
The corresponding speaker ground |
Misc. pins
|
| Amp, ATX+, ATX- |
Amplifier control |
| DATA, CLK |
Head unit communication |
| Alm |
anti-theft alarm system
|
| SWC |
Steering wheel buttons control |
| CAN-L, CAN-H |
CAN on board diagnostic bus |
correct
incorrect