| Number | X-pin, color | Description |
|---|---|---|
| X403 | 12 -pin, Natural | Connector Left front speaker |
| Pin | Type | Description / Signal type | Connection / Measuring notes |
|---|---|---|---|
| 1 | Not used | ||
| 2 | E | LH front woofer voltage control | Radio Amplifier |
| 3 | A | LH front woofer ground control | Radio Amplifier |
| 4 | E | Left front mid-range speaker voltage control | Amplifier |
| 5 | A | Left front mid-range speaker ground control | Amplifier |
| 6 | Not used | ||
| 7 | Not used | ||
| 8 | E | Telephone NF+ | Connector NF+ |
| 9 | A | Telephone NF- | Connector NF- |
| 10 | E | LH front tweeter voltage control | Amplifier |
| 11 | A | LH front tweeter ground control | Amplifier |
| 12 | Not used | ||