Toyota Sienna Service Manual: Short to B+ in Side Squib LH Circuit
DTC B0118/46 Short to B+ in Side Squib LH Circuit
DESCRIPTION
The side squib LH circuit consists of the center airbag sensor assembly and
the front seat side airbag
assembly LH (side squib LH).
This circuit instructs the SRS to deploy when deployment conditions are met.
DTC B0118/46 is recorded when a short to B+ is detected in the side squib LH
circuit
DTC No. |
DTC Detecting Condition |
Trouble Area |
B0118/46 |
- Short circuit in side squib LH wire harness (to B+)
- Side squib LH malfunction
- Center airbag sensor assembly malfunction
|
- Front seat side airbag assembly LH (Side squib LH)
- Center airbag sensor assembly
- Floor wire
|
INSPECTION PROCEDURE
HINT:
- Perform the simulation method by selecting the "check mode"
(signal check) with the intelligent tester
(8).
- After selecting the "check mode" (signal check), perform the
simulation method by wiggling each
connector of the airbag system or driving the vehicle on a city or rough
road
1 CHECK FRONT SEAT SIDE AIRBAG ASSEMBLY LH (SIDE SQUIB LH)

- Turn the ignition switch to the LOCK position.
- Disconnect the negative (-) terminal cable from the
battery, and wait for at least 90 seconds.
- Disconnect the connectors from the front seat side
airbag assembly LH.
- Connect the black wire side of SST (resistance 2.1 Ω) to
the floor wire.
CAUTION:
Never connect a tester to the front seat side airbag
assembly LH (side squib LH) for measurement, as
this may lead to a serious injury due to airbag
deployment.
NOTICE:
Do not forcibly insert the SST into the terminals of
the connector when connecting.
Insert the SST straight into the terminals of the
connector.
SST 09843-18060
- 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 (5).
- 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 B0118/46 is not output.
HINT:
Codes other than DTC B0118/46 may be output at this
time, but they are not related to this check.
Go to step 2

REPLACE FRONT SEAT ASSEMBLY LH
2 CHECK FLOOR WIRE (SIDE SQUIB LH CIRCUIT)

- Turn the ignition switch to the LOCK position.
- Disconnect the negative (-) terminal cable from the
battery, and wait for at least 90 seconds.
- Disconnect the SST (resistance 2.1 Ω) from the floor
wire.
- Disconnect the connector from the center airbag sensor
assembly.
- 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

REPAIR OR REPLACE FLOOR WIRE

3 CHECK CENTER AIRBAG SENSOR ASSEMBLY

- Turn the ignition switch to the LOCK position.
- Disconnect the negative (-) terminal cable from the
battery, and wait for at least 90 seconds.
- ) Connect the connectors to the front seat side airbag
assembly LH and the center airbag sensor assembly.
- 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 (5).
- 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 (5).
OK:
DTC B0118/46 is not output.
HINT:
Codes other than code B0118/46 may be output at this
time, but they are not related to this check
REPLACE CENTER AIRBAG SENSOR
ASSEMBLY

USE SIMULATION METHOD TO CHECK
DTC B0117/45 Short to GND in Side Squib LH Circuit
DESCRIPTION
The side squib LH circuit consists of the center airbag sensor assembly and
the front seat side airbag
assembly LH.
This circuit ...
DTC B0126/27 Seat Belt Buckle Switch LH Circuit Malfunction
DESCRIPTION
The seat belt buckle switch LH circuit consists of the center airbag sensor
assembly and the front seat
inner belt assembly ...
Other materials:
Inspection
1. INSPECT ENGINE COOLANT TEMPERATURE SENSOR
Using an ohmmeter, measure the resistance
between the terminals.
Standard resistance
If the result is as specified, do not replace the
engine coolant temperature sensor.
If the result is not as specified, replace the
engine ...
Perform monitor drive pattern
The monitor results and test values can be checked with
the OBD II scan tool or the intelligent tester. The engine
control module (ECM) monitors the emissions-related
components such as the thermostat, catalyst converter
and evaporative emissions (EVAP), and determines
whether they are function ...
Installation
1. INSTALL VANE PUMP ASSEMBLY
(a) Temporarily install the bolt to the vane pump
assembly.
(b) Install the vane pump assembly.
(c) Temporarily install the bolt (B).
(d) Using SST, tighten the 2 bolts.
SST 09249-63010
Torque:Without SST
43 N*m (439 kgf*cm, 32 ft.*lbf)
With SST
29 ...