Terminals Of Ecu
1. OCCUPANT CLASSIFICATION ECU (for Power Seat)
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specification |
|---|---|---|---|---|
S12-1 (+B) - S12-3 (GND) |
GR - W-B |
Battery |
Always |
10 to 14 V |
S12-2 (DIA) - S12-3 (GND) |
SB - W-B |
Diagnosis (DLC3) |
Ignition switch ON |
Pulse generation |
S12-3 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 V |
S12-4 (FSR-) - S12-3 (GND) |
B - W-B |
Center airbag sensor assembly communication line (-) |
Always |
Below 1 V |
S12-5 (BGND) - S12-3 (GND) |
GR - W-B |
Passenger side buckle switch ground line |
Always |
Below 1 V |
S12-7 (IG) - S12-3 (GND) |
V - W-B |
Power source (ECU-B fuse) |
Ignition switch ON |
10 to 14 V |
S12-8 (FSR+) - S12-4 (FSR-) |
W - B |
Center airbag sensor assembly communication line |
Ignition switch ON |
Pulse generation |
S12-9 (BSW) - S12-5 (BGND) |
L - GR |
Passenger side buckle switch line |
Always |
4 to 14 V |
S13-1 (SGD1) - S12-3 (GND) |
R - W-B |
Front occupant classification sensor LH ground line |
Always |
Below 1 V |
S13-2 (SGD2) - S12-3 (GND) |
Y - W-B |
Front occupant classification sensor RH ground line |
Always |
Below 1 V |
S13-3 (SGD3) - S12-3 (GND) |
BR - W-B |
Rear occupant classification sensor LH ground line |
Always |
Below 1 V |
S13-4 (SGD4) - S12-3 (GND) |
LG - W-B |
Rear occupant classification sensor RH ground line |
Always |
Below 1 V |
S13-5 (SVC3) - S13-3 (SGD3) |
G - BR |
Rear occupant classification sensor LH power supply line |
Ignition switch ON, a load applied to rear occupant classification sensor LH |
4.9 to 5.1 V |
S13-6 (SVC4) - S13-4 (SGD4) |
GR - LG |
Rear occupant classification sensor RH power supply line |
Ignition switch ON, a load applied to rear occupant classification sensor RH |
4.9 to 5.1 V |
S13-7 (SIG1) - S13-1 (SGD1) |
P - R |
Front occupant classification sensor LH signal line |
Ignition switch ON, a load applied to front occupant classification sensor LH |
0 to 5.1 V |
S13-8 (SIG2) - S13-2 (SGD2) |
GR - Y |
Front occupant classification sensor RH signal line |
Ignition switch ON, a load applied to front occupant classification sensor RH |
0 to 5.1 V |
S13-9 (SIG3) - S13-3 (SGD3) |
L - BR |
Rear occupant classification sensor LH signal line |
Ignition switch ON, a load applied to rear occupant classification sensor LH |
0 to 5.1 V |
S13-10 (SIG4) - S13-4 (SGD4) |
SB - LG |
Rear occupant classification sensor RH signal line |
Ignition switch ON, a load applied to rear occupant classification sensor RH |
0 to 5.1 V |
S13-11 (SVC1) - S13-1 (SGD1) |
Y - R |
Front occupant classification sensor LH power supply line |
Ignition switch ON, a load applied to front occupant classification sensor LH |
4.9 to 5.1 V |
S13-12 (SVC2) - S13-2 (SGD2) |
V - Y |
Front occupant classification sensor RH power supply line |
Ignition switch ON, a load applied to front occupant classification sensor RH |
4.9 to 5.1 V |
2. OCCUPANT CLASSIFICATION ECU (for Manual Seat)
Terminal No. (Symbol) | Wiring Color | Terminal Description | Condition | Specification |
|---|---|---|---|---|
M14-1 (+B) - M14-3 (GND) |
G - W-B |
Battery |
Always |
10 to 14 V |
M14-2 (DIA) - M14-3 (GND) |
SB - W-B |
Diagnosis (DLC3) |
Ignition switch ON |
Pulse generation |
M14-3 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 V |
M14-4 (FSR-) - M14-3 (GND) |
B - W-B |
Center airbag sensor assembly communication line (-) |
Always |
Below 1 V |
M14-5 (BGND) - M14-3 (GND) |
Y - W-B |
Passenger side buckle switch ground line |
Always |
Below 1 V |
M14-7 (IG) - M14-3 (GND) |
V - W-B |
Power source (ECU-B fuse) |
Ignition switch ON |
10 to 14 V |
M14-8 (FSR+) - M14-4 (FSR-) |
W - B |
Center airbag sensor assembly communication line |
Ignition switch ON |
Pulse generation |
M14-9 (BSW) - M14-5 (BGND) |
G - Y |
Passenger side buckle switch line |
Always |
4 to 14 V |
S13-1 (SGD1) - M14-3 (GND) |
Y - W-B |
Front occupant classification sensor LH ground line |
Always |
Below 1 V |
S13-2 (SGD2) - M14-3 (GND) |
SB - W-B |
Front occupant classification sensor RH ground line |
Always |
Below 1 V |
S13-3 (SGD3) - M14-3 (GND) |
L - W-B |
Rear occupant classification sensor LH ground line |
Always |
Below 1 V |
S13-4 (SGD4) - M14-3 (GND) |
W - W-B |
Rear occupant classification sensor RH ground line |
Always |
Below 1 V |
S13-5 (SVC3) - S13-3 (SGD3) |
R - L |
Rear occupant classification sensor LH power supply line |
Ignition switch ON, a load applied to rear occupant classification sensor LH |
4.9 to 5.1 V |
S13-6 (SVC4) - S13-4 (SGD4) |
B - W |
Rear occupant classification sensor RH power supply line |
Ignition switch ON, a load applied to rear occupant classification sensor RH |
4.9 to 5.1 V |
S13-7 (SIG1) - S13-1 (SGD1) |
BE - Y |
Front occupant classification sensor LH signal line |
Ignition switch ON, a load applied to front occupant classification sensor LH |
0 to 5.1 V |
S13-8 (SIG2) - S13-2 (SGD2) |
GR - SB |
Front occupant classification sensor RH signal line |
Ignition switch ON, a load applied to front occupant classification sensor RH |
0 to 5.1 V |
S13-9 (SIG3) - S13-3 (SGD3) |
G - L |
Rear occupant classification sensor LH signal line |
Ignition switch ON, a load applied to rear occupant classification sensor LH |
0 to 5.1 V |
S13-10 (SIG4) - S13-4 (SGD4) |
V - W |
Rear occupant classification sensor RH signal line |
Ignition switch ON, a load applied to rear occupant classification sensor RH |
0 to 5.1 V |
S13-11 (SVC1) - S13-1 (SGD1) |
P - Y |
Front occupant classification sensor LH power supply line |
Ignition switch ON, a load applied to front occupant classification sensor LH |
4.9 to 5.1 V |
S13-12 (SVC2) - S13-2 (SGD2) |
BR - SB |
Front occupant classification sensor RH power supply line |
Ignition switch ON, a load applied to front occupant classification sensor RH |
4.9 to 5.1 V |
Test yourself
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