TERMINALS OF ECU
System information
| RADIO RECEIVER |
| Symbols (Terminal No.) |
Wiring Color |
Terminal Description |
Condition |
Specification |
| B (R2-1) - GND (R2-20) |
L-B - BR |
Battery |
Always |
10 to 14 V |
| ILL+ (R2-2) - GND (R2-20) |
G - BR |
Illumination (rheostat) signal |
Light control switch OFF → TAIL |
Below 1 V → 10 to 14 V |
| ATX+ (R2-5) - GND (R2-20) |
P - BR |
AVC-LAN communication signal |
Turn ignition switch to ACC |
2 to 3 V |
| MUTE (R2-7) - GND (R2-20) |
GR - BR |
MUTE signal |
Audio system is playing → Changing |
Above 3.5 V → Below 1 V |
| R+ (R2-8) - GND (R2-20) |
B - BR |
Sound signal (Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| L+ (R2-9) - GND (R2-20) |
R - BR |
Sound signal (Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| SLD (R2-10) - Body ground |
Shielded - Body ground |
Shield ground |
Always |
Below 1 V |
| ACC (R2-11) - GND (R2-20) |
GR - BR |
Accessory (ON) |
Turn ignition switch to ACC |
10 to 14 V |
| ILL- (R2-12) - GND (R2-20) |
W - BR |
Illumination (rheostat) signal |
Turn ignition switch off → ON |
Below 1 V → Pulse generation |
| ANT (R2-13) - GND (R2-20) |
O - BR |
Power source of antenna |
Radio switch ON and AM or FM |
10 to 14 V |
| ATX- (R2-15) - GND (R2-20) |
L - BR |
AVC-LAN communication signal |
Turn ignition switch to ACC |
2 to 3 V |
| R- (R2-18) - GND (R2-20) |
W - BR |
Sound signal (Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| L- (R2-19) - GND (R2-20) |
G - BR |
Sound signal (Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| GND (R2-20) - Body ground |
BR - Body ground |
Ground |
Always |
Below 1 V |
| SWG (R4-6) - GND (R2-20) |
R - BR |
Steering pad switch ground |
Always |
Below 1 V |
| SW1 (R4-7) - GND (R2-20) |
G - BR |
Steering pad switch signal |
Steering pad switch not operated → SEEK+ switch pushed → SEEK- switch pushed → VOL+ switch pushed → VOL- switch pushed |
4 V or more → Approx. 0.5 V → Approx. 0.9 V → Approx. 2.0 V → Approx. 3.4 V |
| SW2 (R4-8) - GND (R2-20) |
V - BR |
Steering pad switch signal |
Steering pad switch not operated → MODE switch pushed |
4 V or more → Below 2.5 V |
| TX+ (R3-9) - GND (R2-20) |
Y (*1) - BR B (*2) - BR |
AVC-LAN communication signal |
Turn ignition switch to ACC |
2 to 3 V |
| TX- (R3-10) - GND (R2-20) |
BR (*1) - BR R (*2) - BR |
AVC-LAN communication signal |
Turn ignition switch to ACC |
2 to 3 V |
*2: Without Navigation System
| STEREO COMPONENT AMPLIFIER (STANDARD SYSTEM) |
*2: Without Navigation System
*3: LHD Models
*4: RHD Models
| Symbols (Terminal No.) |
Wiring Color |
Terminal Description |
Condition |
Specification |
| +B (S30-1) - GND (S30-16) |
W - W-B |
Battery |
Always |
10 to 14 V |
| WF2+ (S30-4) - GND (S30-16) |
V - W-B |
Sound signal (Woofer Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| WF1+ (S30-5) - GND (S30-16) |
P - W-B |
Sound signal (Woofer Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| RL+ (S30-6) - GND (S30-16) |
R - W-B |
Sound signal (Rear Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| RR+ (S30-7) - GND (S30-16) |
R-Y - W-B |
Sound signal (Rear Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| FL+ (S30-8) - GND (S30-16) (*3) |
Y (*1) - W-B BR (*2) - W-B |
Sound signal (Front Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| FL+ (S30-8) - GND (S30-16) (*4) |
BR - W-B |
Sound signal (Front Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| FR+ (S30-9) - GND (S30-16) (*3) |
V - W-B |
Sound signal (Front Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| FR+ (S30-9) - GND (S30-16) (*4) |
Y (*1) W-B V (*2) - W-B |
Sound signal (Front Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| +B2 (S30-10) - GND (S30-16) |
W - W-B |
Battery |
Always |
10 to 14 V |
| WF2- (S30-13) - GND (S30-16) |
W - W-B |
Sound signal (Front Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| WF1- (S30-14) - GND (S30-16) |
L-B - W-B |
Sound signal (Front Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| GND2 (S30-15) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 V |
| GND (S30-16) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 V |
| RL- (S30-17) - GND (S30-16) |
GR - W-B |
Sound signal (Rear Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| RR- (S30-18) - GND (S30-16) |
L - W-B |
Sound signal (Rear Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| FL- (S30-19) - GND (S30-16) (*3) |
LG (*1) - W-B R-Y (*2) - W-B |
Sound signal (Front Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| FL- (S30-19) - GND (S30-16) (*4) |
R-Y - W-B |
Sound signal (Front Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| FR- (S30-20) - GND (S30-16) (*3) |
P - W-B |
Sound signal (Front Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| FR- (S30-20) - GND (S30-16) (*4) |
LG (*1) - W-B P (*2) - W-B |
Sound signal (Front Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| MUTE (S27-1) - GND (S30-16) |
Y - W-B |
Mute signal from radio receiver |
Audio system is playing → Changing |
Above 3.5 V → Below 3.5 V |
| L- (S27-2) - GND (S30-16) |
G - W-B |
Sound signal from radio receiver (Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| L+ (S27-3) - GND (S30-16) |
R - W-B |
Sound signal from radio receiver (Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| R- (S27-4) - GND (S30-16) |
W - W-B |
Sound signal from radio receiver (Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| R+ (S27-5) - GND (S30-16) |
B - W-B |
Sound signal from radio receiver (Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| SLD (S27-6) - Body ground |
Shield ground - Body ground |
Shield ground |
Always |
Below 1 V |
| TX- (S27-7) - GND (S30-16) |
L - W-B |
AVC-LAN communication signal |
Turn ignition switch to ACC |
2 to 3 V |
| TX+ (S27-8) - GND (S30-16) |
P - W-B |
AVC-LAN communication signal |
Turn ignition switch to ACC |
2 to 3 V |
| SPD (S27-11) - GND (S30-16) |
SB - W-B |
Speed signal from combination meter |
Vehicle is driven |
Pulse generation |
| ACC (S27-12) - GND (S30-16) |
P - W-B |
Accessory (ON) |
Turn ignition switch to ACC |
Below 1 V → 10 to 14 V |
| N-MU (S27-21) - GND (S30-16) (*1) |
V - W-B |
Mute signal from navigation ECU |
Navigation system is changing |
Above 3.5 V → Below 1 V |
| STEREO COMPONENT AMPLIFIER (MARK LEVINSON SYSTEM) |
*2: Without Navigation System
*3: LHD Models
*4: RHD Models
| Symbols (Terminal No.) |
Wiring Color |
Terminal Description |
Condition |
Specification |
| FR+ (S29-1) - GND (S29-13) |
P - W-B |
Sound signal (Front Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| FL+ (S29-2) - GND (S29-13) |
V - W-B |
Sound signal (Front Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| RR+ (S29-3) - GND (S29-13) |
R-Y - W-B |
Sound signal (Rear Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| RL+ (S29-4) - GND (S29-13) |
R - W-B |
Sound signal (Rear Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| CTF+ (S29-5) - GND (S29-13) |
GR - W-B |
Sound signal (Center) |
Audio system is playing |
A waveform synchronized with sounds is output |
| B+ (S29-7) - GND (S29-13) |
W - W-B |
Battery |
Always |
10 to 14 V |
| FR- (S29-8) - GND (S29-13) |
L-B - W-B |
Sound signal (Front Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| FL- (S29-9) - GND (S29-13) |
W - W-B |
Sound signal (Front Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| RR- (S29-10) - GND (S29-13) |
L - W-B |
Sound signal (Rear Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| RL- (S29-11) - GND (S29-13) |
GR - W-B |
Sound signal (Rear Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| E (S29-12) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 V |
| GND (S29-13) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 V |
| CTF- (S29-14) - GND (S29-13) |
B - W-B |
Sound signal (Center) |
Audio system is playing |
A waveform synchronized with sounds is output |
| B+ (S29-16) - GND (S29-13) |
W - W-B |
Battery |
Always |
10 to 14 V |
| TFR+ (S28-1) - GND (S29-13) (*3) |
V - W-B |
Sound signal (Front Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| TFR+ (S28-1) - GND (S29-13) (*4) |
Y (*1) - W-B V (*2) - W-B |
Sound signal (Front Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| TFL+ (S28-2) - GND (S29-13) (*3) |
Y (*1) - W-B BR (*2) - W-B |
Sound signal (Front Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| TFL+ (S28-2) - GND (S29-13) (*4) |
BR - W-B |
Sound signal (Front Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| MTX+ (S28-5) - GND (S29-13) |
P - W-B |
AVC-LAN communication signal |
Turn ignition switch to ACC |
2 to 3 V |
| N-MU (S28-9) - GND (S29-13) |
V (*1) - W-B |
Mute signal from navigation ECU |
Audio system is playing → Changing |
Above 3.5 V → Below 1 V |
| R+ (S28-11) - GND (S29-13) |
B - W-B |
Sound signal from radio receiver (Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| L+ (S28-12) - GND (S29-13) |
R - W-B |
Sound signal from radio receiver (Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| SPD (S28-13) - GND (S29-13) |
SB - W-B |
Speed signal from combination meter |
Vehicle is driven |
Pulse generation |
| TFR- (S28-14) - GND (S29-13) (*3) |
P - W-B |
Sound signal (Front Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| TFR- (S28-14) - GND (S29-13) (*4) |
LG (*1) - W-B P (*2) - W-B |
Sound signal (Front Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| TFL- (S28-15) - GND (S29-13) (*3) |
LG (*1) - W-B R-Y (*2) - W-B |
Sound signal (Front Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| TFL- (S28-15) - GND (S29-13) (*4) |
R-Y - W-B |
Sound signal (Front Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
| MTX- (S28-18) - GND (S29-13) |
L - W-B |
AVC-LAN communication signal |
Turn ignition switch to ACC |
2 to 3 V |
| ACC (S28-20) - GND (S29-13) |
P - W-B |
Accessory (ON) |
Turn ignition switch off → ACC or ON |
10 to 14 V |
| MUTE (S28-21) - GND (S29-13) |
GR (*3) - W-B Y (*4) - W-B |
Mute signal from radio receiver |
Audio system is playing → Changing |
Above 3.5 V → Below 1 V |
| SGND (S28-22) - Body ground |
Shield ground - Body ground |
Shield ground |
Always |
Below 1 V |
| R- (S28-23) - GND (S29-13) |
W - W-B |
Sound signal from radio receiver (Right) |
Audio system is playing |
A waveform synchronized with sounds is output |
| L- (S28-24) - GND (S29-13) |
G - W-B |
Sound signal from radio receiver (Left) |
Audio system is playing |
A waveform synchronized with sounds is output |
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