Toyota Sienna Service Manual: Short to B+ in Front Passenger Side Squib Circuit
DTC B0108/52 Short to B+ in Front Passenger Side Squib Circuit
DESCRIPTION
The front passenger side squib circuit consists of the center airbag sensor
assembly and the front
passenger airbag assembly.
The circuit instructs the SRS to deploy when deployment conditions are met.
DTC B0108/52 is recorded when a short to B+ is detected in the front passenger
side squib circuit
DTC No. |
DTC Detecting Condition |
Trouble Area |
B0108/52 |
- Short circuit in front passenger side squib wire
harness (to B+)
- Front passenger side squib malfunction
- Center airbag sensor assembly malfunction
|
- Front passenger airbag assembly (Front passenger
side squib)
- Center airbag sensor assembly
- Instrument panel 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 PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB)
- 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 passenger
airbag assembly.
- Connect the black wire side of SST (resistance 2.1 Ω) to
the instrument panel wire.
CAUTION:
Never connect a tester to the front passenger airbag
assembly (front passenger side squib) 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 (5).
OK:
DTC B0108/52 is not output.
HINT:
Codes other than DTC B0108/52 may be output at this
time, but they are not related to this check.
Go to step 2
REPLACE FRONT PASSENGER AIRBAG ASSEMBLY
2 CHECK INSTRUMENT PANEL WIRE (FRONT PASSENGER SIDE SQUIB 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
instrument panel 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 INSTRUMENT
PANEL
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 passenger airbag
assembly 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 B0108/52 is not output.
HINT:
Codes other than code B0108/52 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 B0107/51 Short to GND in Front Passenger Side Squib
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DESCRIPTION
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assembly and the front
passenger airbag as ...
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DESCRIPTION
The side squib RH circuit consists of the center airbag sensor assembly and
the front seat side airbag
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The circuit instruct ...
Other materials:
Transfer system
PRECAUTION
NOTICE:
1. Before disassembly, clean the transfer assembly of
any sand or mud to prevent it from entering inside the
transfer during disassembly and assembly.
2. When removing any light alloy part such as a transfer
cover, do not pry it off with a tool like a screwdriver,
but tap ...
Inspection
1. INSPECT GARAGE DOOR OPENER
Press the switch and check that each red LED turns
on. If one or more of the switches does not turn on
the LED, confirm normal operation of the fuse and
wire harness, then replace the garage door opener.
2. INSPECT GARAGE DOOR OPENER REGISTRATION ...
Fail-safe chart
If any of the following DTCs are set, the ECM enters fail-safe
mode to allow the vehicle to be driven temporarily.
HINT:
*1: The vehicle can be driven slowly when the accelerator
pedal is depressed firmly and slowly. If the accelerator
pedal is depressed quickly, the vehicle may ...