Toyota Sienna Service Manual: Side Airbag Sensor Assembly LH Circuit Malfunction
DTC B1141/33 Side Airbag Sensor Assembly LH Circuit Malfunction
DESCRIPTION
The side airbag sensor LH circuit consists of the center airbag sensor
assembly and side airbag sensor
LH.
If the center airbag sensor assembly receives signals from the side airbag
sensor LH, it judges whether or
not the SRS should be activated.
DTC B1141/33 is recorded when a malfunction in the side airbag sensor LH circuit
is detected.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK DTC
- Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
- Clear the DTCs stored in memory.
- Turn the ignition switch to the LOCK position.
- Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
- Check the DTCs.
OK:
DTC B1141/33 is not output.
HINT:
Codes other than DTC B1141/33 may be output at this
time, but they are not related to this check.
USE SIMULATION METHOD TO CHECK2 CHECK CONNECTION OF CONNECTORS
- Turn the ignition switch to the LOCK position.
- Disconnect the negative (-) terminal cable from the
battery, and wait for at least 90 seconds.
- Check that the connectors are properly connected to the
center airbag sensor assembly and the side airbag
sensor LH.
OK:
The connectors are connected.
3 CHECK FLOOR WIRE (OPEN)
- Disconnect the connectors from the center airbag sensor
assembly and the side airbag sensor LH.
- Using a service wire, connect A20-16 (VUPL) and A20-
18 (ESL) of connector "B".
NOTICE:
Do not forcibly insert a service wire into the
terminals of the connector when connecting.
- Measure the resistance according to the value(s) in the
table below.
Standard resistance
- Using a service wire, connect A20-17 (SSL+) and A20-
20 (SSL-) of connector "B".
NOTICE:
Do not forcibly insert a service wire into the
terminals of the connector when connecting.
- Measure the resistance according to the value(s) in the
table below.
Standard resistance
4 CHECK FLOOR WIRE (SHORT TO B+)
- Disconnect the service wire from connector "B".
- Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
- Turn the ignition switch to the ON position.
- Measure the voltage according to the value(s) in the
table below.
Standard voltage
5 CHECK FLOOR WIRE (SHORT TO GROUND)
- Turn the ignition switch to the LOCK position.
- Disconnect the negative (-) terminal cable from the
battery, and wait for at least 90 seconds.
- Measure the resistance according to the value(s) in the
table below.
Standard resistance
6 CHECK FLOOR WIRE (SHORT)
- Measure the resistance according to the value(s) in the
table below
Standard resistance
7 CHECK SIDE AIRBAG SENSOR LH
- Connect the connector to the center airbag sensor
assembly.
- Interchange the side airbag sensor RH with LH and
connect the connectors to them.
- Connect the negative (-) terminal cable to the battery,
and wait for at least 2 seconds.
- Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
- Clear the DTCs stored in memory.
- Turn the ignition switch to the LOCK position.
- Turn the ignition switch to the ON position, and wait for at
least 60 seconds.
- Check the DTCs.
Result
HINT:
Codes other than DTC B1140/32 and B1141/33 may be
output at this time, but they are not related to this check.
USE SIMULATION METHOD TO CHECK
DTC B1140/32 Side Airbag Sensor Assembly RH Circuit Malfunction
DESCRIPTION
The side airbag sensor RH circuit consists of the center airbag sensor
assembly and side airbag sensor
RH.
If the ce ...
DTC B1148/36 Front Airbag Sensor RH Circuit Malfunction
DESCRIPTION
The front airbag sensor RH circuit consists of the center airbag sensor
assembly and front airbag sensor
RH. If the center airb ...
Other materials:
Data list
HINT:
Reading the DATA LIST displayed on an intelligent tester
enables values, including those of the switches, sensors,
and actuators, to be checked without removing any
parts. Reading the DATA LIST as the first step in
troubleshooting is one method to shorten diagnostic
time.
NOTICE: ...
Definition of terms
Term
Definition
Monitor description
Description of what the ecm monitors and how it detects malfunctions
(monitoring purpose and its details).
Related dtcs
Diagnostic codeV
Typical enabling condition
Preconditions that allow the ecm to detect malfunc ...
U151e automatic transaxle
SERVICE DATA
TORQUE SPECIFICATIONS
...