| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJZ4 |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: SEAT BELT: SEAT BELT WARNING SYSTEM: TERMINALS OF ECU; 2016 - 2020 MY Sienna [12/2015 - ] | ||
TERMINALS OF ECU
1. CHECK COMBINATION METER ASSEMBLY
(a) Measure the resistance and voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
D145-1 (B) - Body ground |
W - Body ground |
Battery power supply |
Always |
11 to 14 V |
|
D145-13 (IG+) - Body ground |
GR - Body ground |
Ignition switch power supply |
Ignition switch ON |
11 to 14 V |
|
Ignition switch off |
Below 1 V |
|||
|
D145-11 (E1) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
|
D145-20 (ES) - Body ground |
BR - Body ground |
Ground |
Always |
Below 1 Ω |
|
D145-17 (CANH) - Body ground |
P - Body ground |
CAN communication line |
Always |
200 Ω or higher |
|
D145-16 (CANL) - Body ground |
W - Body ground |
CAN communication line |
Always |
200 Ω or higher |
- If the result is not as specified, the combination meter assembly may have a malfunction.
2. CHECK CENTER AIRBAG SENSOR ASSEMBLY
|
Terminal No. |
Terminal Symbol |
Destination |
|---|---|---|
|
L47-16 |
FSR+ |
Occupant classification ECU |
|
L47-24 |
FSR- |
Occupant classification ECU |
|
K31-10 |
LBE+ |
Front seat inner belt assembly (for driver side) |
|
K31-18 |
LBE- |
Front seat inner belt assembly (for driver side) |
3. CHECK OCCUPANT CLASSIFICATION ECU
(a) Measure the voltage and check for pulses according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
X6-1 (+B) - X6-3 (GND) |
W - W-B |
Battery power supply |
Always |
11 to 14 V |
|
X6-2 (DIA) - X6-3 (GND) |
GR - W-B |
Diagnosis (DLC3) |
Ignition switch ON |
Pulse generation |
|
X6-3 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 V |
|
X6-7 (IG2) - X6-3 (GND) |
B - W-B |
Ignition switch power supply |
Ignition switch ON |
11 to 14 V |
|
X6-8 (FSR+) - X6-4 (FSR-) |
L - LG |
Center airbag sensor assembly communication line |
Ignition switch ON |
Pulse generation |
|
X6-9 (BSW) - X6-5 (BGND) |
G - P |
Front passenger side buckle switch line |
Always |
4 to 14 V |
|
X7-1 (SGD1) - X6-3 (GND) |
G - W-B |
Front occupant classification sensor LH ground line |
Always |
Below 1 V |
|
X7-2 (SGD2) - X6-3 (GND) |
LG - W-B |
Front occupant classification sensor RH ground line |
Always |
Below 1 V |
|
X7-3 (SGD3) - X6-3 (GND) |
W - W-B |
Rear occupant classification sensor LH ground line |
Always |
Below 1 V |
|
X7-4 (SGD4) - X6-3 (GND) |
BR - W-B |
Rear occupant classification sensor RH ground line |
Always |
Below 1 V |
|
X7-11 (SVC1) - X7-1 (SGD1) |
R - G |
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 |
|
X7-12 (SVC2) - X7-2 (SGD2) |
W - LG |
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 |
|
X7-5 (SVC3) - X7-3 (SGD3) |
GR - W |
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 |
|
X7-6 (SVC4) - X7-4 (SGD4) |
V - BR |
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 |
|
X7-7 (SIG1) - X7-1 (SGD1) |
P - G |
Front occupant classification sensor LH signal line |
Ignition switch ON, a load applied to front occupant classification sensor LH |
0 to 5.1 V |
|
X7-8 (SIG2) - X7-2 (SGD2) |
L - LG |
Front occupant classification sensor RH signal line |
Ignition switch ON, a load applied to front occupant classification sensor RH |
0 to 5.1 V |
|
X7-9 (SIG3) - X7-3 (SGD3) |
SB - W |
Rear occupant classification sensor LH signal line |
Ignition switch ON, a load applied to rear occupant classification sensor LH |
0 to 5.1 V |
|
X7-10 (SIG4) - X7-4 (SGD4) |
B - BR |
Rear occupant classification sensor RH signal line |
Ignition switch ON, a load applied to rear occupant classification sensor RH |
0 to 5.1 V |
- If the result is not as specified, the occupant classification ECU may have a malfunction.
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