- Occupant classification system malfunction
- The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the occupant classification system circuit for 2 seconds.
- Center airbag sensor assembly malfunction
| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM100000000VJR0 |
| Model Year Start: 2016 | Model: Sienna | Prod Date Range: [12/2015 - ] |
| Title: SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1650/32; Occupant Classification System Malfunction; 2016 - 2020 MY Sienna [12/2015 - ] | ||
|
DTC |
B1650/32 |
Occupant Classification System Malfunction |
DESCRIPTION
The occupant classification system circuit consists of the center airbag sensor assembly and the occupant classification system.
If the center airbag sensor assembly receives signals from the occupant classification ECU, it determines whether the front passenger airbag, the front seat side airbag RH and front seat outer belt should be operated.
DTC B1650/32 is stored when a malfunction is detected in the occupant classification system circuit.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B1650/32 |
When one of following conditions is met: |
|
WIRING DIAGRAM
PROCEDURE
|
1. |
CHECK FOR DTC (OCCUPANT CLASSIFICATION ECU) |
(a) Turn the ignition switch to ON, and wait for at least 10 seconds.
(b) Check for the DTCs of the occupant classification ECU (See page
![2016 - 2020 MY Sienna [12/2015 - ]; SUPPLEMENTAL RESTRAINT SYSTEMS: OCCUPANT CLASSIFICATION SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
).
OK:
DTC is not output.
| NG |
|
|
|
2. |
CHECK FOR DTC (CENTER AIRBAG SENSOR) |
(a) Turn the ignition switch to ON, and wait for at least 60 seconds.
(b) Clear the DTCs (See page
).
(c) Turn the ignition switch off.
(d) Turn the ignition switch to ON, and wait for at least 60 seconds.
(e) Check for DTCs (See page
).
OK:
DTC B1650/32 is not output.
HINT:
Codes other than DTC B1650/32 may be output at this time, but they are not related to this check.
| OK |
|
|
|
3. |
CHECK CONNECTION OF CONNECTORS |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Check that the connectors are properly connected to the center airbag sensor assembly and the occupant classification ECU.
OK:
The connectors are properly connected.
| NG |
|
CONNECT CONNECTORS PROPERLY |
|
|
4. |
CHECK CONNECTORS |
(a) Disconnect the connectors from the center airbag sensor assembly and the occupant classification ECU.
(b) Check that the connectors (on the center airbag sensor assembly side and occupant classification ECU side) are not damaged.
OK:
The connectors are not deformed or damaged.
| NG |
|
REPLACE HARNESS AND CONNECTOR |
|
|
5. |
CHECK OCCUPANT CLASSIFICATION SYSTEM CIRCUIT |
Text in Illustration
|
*a |
Front view of wire harness connector (to Occupant Classification ECU) |
*b |
Rear view of wire harness connector (to Center Airbag Sensor Assembly) |
|
*1 |
Occupant Classification ECU |
*2 |
Center Airbag Sensor Assembly |
|
*3 |
Connector E |
*4 |
Connector B |
|
*5 |
Service Wire |
- |
- |
(a) Using a service wire, connect terminals 16 (FSR+) and 24 (FSR-) of connector B.
NOTICE:
Do not forcibly insert a service wire into the terminals of the connector when connecting the wire.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
X6-8 (FSR+) - X6-4 (FSR-) |
Always |
Below 1 Ω |
(c) Disconnect the service wire from connector B.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
X6-8 (FSR+) - X6-4 (FSR-) |
Always |
1 MΩ or higher |
|
X6-8 (FSR+) - Body ground |
Always |
1 MΩ or higher |
|
X6-4 (FSR-) - Body ground |
Always |
1 MΩ or higher |
(e) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(f) Turn the ignition switch to ON.
(g) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
X6-8 (FSR+) - Body ground |
Ignition switch ON |
Below 1 V |
|
X6-4 (FSR-) - Body ground |
Ignition switch ON |
Below 1 V |
| OK |
|
|
|
6. |
CHECK NO. 2 FLOOR WIRE (CENTER AIRBAG SENSOR ASSEMBLY - FRONT SEAT WIRE RH) |
Text in Illustration
|
*a |
Front view of wire harness connector (to Front Seat Wire RH) |
*b |
Rear view of wire harness connector (to Center Airbag Sensor Assembly) |
|
*1 |
Occupant Classification ECU |
*2 |
Center Airbag Sensor Assembly |
|
*3 |
Front Seat Wire RH |
*4 |
No. 2 Floor Wire |
|
*5 |
Connector C |
*6 |
Connector B |
|
*7 |
Service Wire |
- |
- |
(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Disconnect the front seat wire RH connector from the No. 2 floor wire.
(d) Using a service wire, connect terminal 16 (FSR+) and 24 (FSR-) of connector B.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
LX1-1 (FSR+) - LX1-4 (FSR-) |
Always |
Below 1 Ω |
(f) Disconnect the service wire from connector B.
(g) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
LX1-1 (FSR+) - LX1-4 (FSR-) |
Always |
1 MΩ or higher |
|
LX1-1 (FSR+) - Body ground |
Always |
1 MΩ or higher |
|
LX1-4 (FSR-) - Body ground |
Always |
1 MΩ or higher |
(h) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(i) Turn the ignition switch to ON.
(j) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
LX1-1 (FSR+) - Body ground |
Ignition switch ON |
Below 1 V |
|
LX1-4 (FSR-) - Body ground |
Ignition switch ON |
Below 1 V |
| OK |
|
REPLACE FRONT SEAT WIRE RH |
| NG |
|
REPLACE NO. 2 FLOOR WIRE |
|
|