| Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specified Condition |
| L53-1 (+B) - L53-3 (GND) | L - W-B | Battery | Always | 11 to 14 V |
| L53-3 (GND) - Body ground | W-B - Body ground | Ground | Always | Below 1 V |
| L53-4 (GND2) - Body ground | W-B - Body ground | Ground | Always | Below 1 V |
| L53-5 (HP2L) - L53-3 (GND) | W - W-B | RSE sound signal | RSE is playing | Waveform synchronized with sound is output. |
| L53-6 (SLD6) - L53-3 (GND) | Shielded - W-B | Shield ground | Always | Below 1 V |
| L53-7 (HP2R) - L53-3 (GND) | B - W-B | RSE sound signal | RSE is playing | Waveform synchronized with sound is output. |
| L53-8 (HP1L) - L53-3 (GND) | W - W-B | RSE sound signal | RSE is playing | Waveform synchronized with sound is output. |
| L53-9 (SLD5) - L53-3 (GND) | Shielded - W-B | Shield ground | Always | Below 1 V |
| L53-10 (HP1R) - L53-3 (GND) | B - W-B | RSE sound signal | RSE is playing | Waveform synchronized with sound is output. |
| L53-11 (+B2) - L53-3 (GND) | L - W-B | Battery | Always | 11 to 14 V |
| L53-17 (VMTR) - L53-3 (GND) | G - W-B | Mute signal | RSE is playing → Source is changed | 4 V or higher → Below 0.7 V → 4 V or higher |
| L53-18 (SLD4) - L53-3 (GND) | Shielded - W-B | Shield ground | Always | Below 1 V |
| L53-19 (SGN4) - L53-3 (GND) | W - W-B | Display signal ground | Always | Below 1 V |
| L53-20 (NTS4) - L53-19 (SGN4) | B - W | Display signal | RSE is playing | Waveform synchronized with display signals is output |
| L56-2 (MI+) | B | MOST communication signal | - | - |
| L56-3 (MI-) | B | MOST communication signal | - | - |
| L56-4 (SLDI) - Body ground | Shielded - Body ground | Shield ground | Always | Below 1 V |
| L56-5 (MO+) | B | MOST communication signal | - | - |
| L56-6 (MO-) | B | MOST communication signal | - | - |
| L56-7 (SLDO) - Body ground | Shielded - Body ground | Shield ground | Always | Below 1 V |
| L56-8 (WUI) - L53-3 (GND) | W - W-B | MOST communication wake up signal
(Input) | Engine switch on (ACC) | 4.5 V or higher |
| Engine switch off | Below 1 V |
