- The center airbag sensor receives a line short signal, open signal, short to ground signal or B+ short signal in the occupant classification system circuit for 2 seconds.
- Occupant classification ECU malfunction
- Center airbag sensor malfunction
| Last Modified: 7-3-2017 | 6.8:8.0.40 | Doc ID: RM00000124H00FX |
| Model Year Start: 2007 | Model: LX470 | Prod Date Range: [08/2006 - ] |
| Title: SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1150/23; Occupant Classification System Malfunction; 2007 MY LX470 [08/2006 - ] | ||
|
DTC |
B1150/23 |
Occupant Classification System Malfunction |
DESCRIPTION
The occupant classification system circuit consists of the center airbag sensor and the occupant classification ECU.
If the center airbag sensor receives signals from the occupant classification ECU, it determines whether or not the front passenger airbag and the front seat airbag RH should be operated.
DTC B1150/23 is recorded when a malfunction is detected in the occupant classification system circuit.
|
DTC No. |
DTC Detection Condition |
Trouble Area |
|---|---|---|
|
B1150/23 |
When one of following conditions is met: |
|
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
|
1. |
CHECK FOR DTC (OCCUPANT CLASSIFICATION ECU) |
(a) Turn the ignition switch ON, and wait for at least 10 seconds.
(b)
Using the intelligent tester, check the DTCs of the occupant classification ECU
![2007 MY LX470 [08/2006 - ]; SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: DTC CHECK / CLEAR](../../../../stylegraphics/info.gif "2007 MY LX470 [08/2006 - ]; SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: DTC CHECK / CLEAR")
.
OK:
DTC is not output.
| NG |
|
|
|
2. |
CHECK FOR DTC (CENTER AIRBAG SENSOR ASSEMBLY) |
|
(a) Turn the ignition switch ON, and wait for at least 60 seconds. |
|
(b)
Clear the DTCs stored in memory
.
(c) Turn the ignition switch OFF.
(d) Turn the ignition switch ON, and wait for at least 60 seconds.
(e)
Check the DTCs
.
OK:
DTC B1150/23 is not output.
HINT:
Codes other than code B1150/23 may be output at this time, but they are not related to this check.
| OK |
|
|
|
3. |
CHECK CONNECTION OF CONNECTOR |
(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 and the occupant classification ECU.
OK:
The connectors are connected.
| NG |
|
|
|
4. |
CHECK OCCUPANT CLASSIFICATION ECU CIRCUIT (SHORT TO GROUND) |
|
(a) Disconnect the connectors from the center airbag sensor and the occupant classification ECU. |
|
(b) Measure the resistance of the wire harness side connector.
Standard resistance:
|
Tester Connection |
Specified Condition |
|---|---|
|
O5-11 (FSR+) - Body ground |
1 MΩ or higher |
|
O5-12 (FSR-) - Body ground |
1 MΩ or higher |
| NG |
|
|
|
5. |
CHECK OCCUPANT CLASSIFICATION ECU CIRCUIT (SHORT TO B+) |
|
(a) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds. |
|
(b) Turn the ignition switch ON.
(c) Measure the voltage of the wire harness side connector.
Standard voltage:
|
Tester Connection |
Specified Condition |
|---|---|
|
O5-11 (FSR+) - Body ground |
Below 1 V |
|
O5-12 (FSR-) - Body ground |
Below 1 V |
| NG |
|
|
|
6. |
CHECK OCCUPANT CLASSIFICATION ECU CIRCUIT (SHORT) |
|
(a) Turn the ignition switch OFF. |
|
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Measure the resistance of the wire harness side connector.
Standard resistance:
|
Tester Connection |
Specified Condition |
|---|---|
|
O5-11 (FSR+) - O5-12 (FSR-) |
1 MΩ or higher |
| NG |
|
|
|
7. |
CHECK OCCUPANT CLASSIFICATION ECU CIRCUIT (OPEN) |
|
(a) Using a service wire, connect terminals C33-1 (FSR+) and C33-2 (FSR-) of connector "B". |
|
(b) Measure the resistance of the wire harness side connector.
Standard resistance:
|
Tester Connection |
Specified Condition |
|---|---|
|
O5-11 (FSR+) - O5-12 (FSR-) |
Below 1 Ω |
| NG |
|
|
|
8. |
CHECK FRONT SEAT WIRE RH (SHORT TO GROUND) |
|
(a) Disconnect the front seat wire RH connector from the No. 2 floor wire. |
|
(b) Measure the resistance of the wire harness side connector.
Standard resistance:
|
Tester Connection |
Specified Condition |
|---|---|
|
O5-11 (FSR+) - Body ground |
1 MΩ or higher |
|
O5-12 (FSR-) - Body ground |
1 MΩ or higher |
| NG |
|
| OK |
|
|
9. |
CHECK FRONT SEAT WIRE RH (SHORT TO B+) |
|
(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) Connect the cable to the negative (-) battery terminal, and wait for at least 2 seconds.
(e) Turn the ignition switch ON.
(f) Measure the voltage of the wire harness side connector.
Standard voltage:
|
Tester Connection |
Specified Condition |
|---|---|
|
O5-11 (FSR+) - Body ground |
Below 1 V |
|
O5-12 (FSR-) - Body ground |
Below 1 V |
| NG |
|
| OK |
|
|
10. |
CHECK FRONT SEAT WIRE RH (SHORT) |
|
(a) Disconnect the front seat wire RH connector from the No. 2 floor wire. |
|
(b) Measure the resistance of the wire harness side connector.
Standard resistance:
|
Tester Connection |
Specified Condition |
|---|---|
|
O5-11 (FSR+) - O5-12 (FSR-) |
1 MΩ or higher |
| NG |
|
| OK |
|
|
11. |
CHECK FRONT SEAT WIRE RH (OPEN) |
|
(a) Disconnect the service wire from connector "B". |
|
(b) Disconnect the front seat wire RH connector from the No. 2 floor wire.
(c) Using a service wire, connect terminals BR2-1 (FSR+) and BR2-2 (FSR-) of connector "D".
NOTICE:
Do not forcibly insert a service wire into the terminals of the connector when connecting.
(d) Measure the resistance of the wire harness side connector.
Standard resistance:
|
Tester Connection |
Specified Condition |
|---|---|
|
O5-11 (FSR+) - O5-12 (FSR-) |
Below 1 Ω |
| NG |
|
| OK |
|
|
|