Toyota Sienna Service Manual: Short to B+ in Driver Side Squib 2nd Step Circuit
DTC B1183/22 Short to B+ in Driver Side Squib 2nd Step Circuit
DESCRIPTION
The driver side squib 2nd step circuit consists of the center airbag sensor assembly, the spiral cable and the steering pad.
The circuit instructs the SRS to deploy when deployment conditions are met.
DTC B1183/22 is recorded when a short to B+ is detected in the driver side squib 2nd step circuit.
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DTC No. |
DTC Detecting Condition |
Trouble Area |
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B1183/22 |
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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 STEERING PAD (DRIVER SIDE SQUIB 2ND STEP)
- 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 steering pad.
- Connect the white wire side of SST (resistance 2.1 Ω) to the spiral cable.
CAUTION: Never connect a tester to the steering pad (driver side squib 2nd step) 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 B1183/22 is not output.
HINT: Codes other than DTC B1183/22 may be output at this time, but they are not related to this check.
Go to step 2
REPLACE STEERING PAD
2 CHECK DRIVER SIDE SQUIB 2ND STEP 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 spiral cable.
- 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
Go to step 4
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 steering pad 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 B1183/22 is not output.
HINT: Codes other than DTC B1183/22 may be output at this time, but they are not related to this check.
REPLACE CENTER AIRBAG SENSOR
ASSEMBLY
USE SIMULATION METHOD TO CHECK
4 CHECK INSTRUMENT PANEL WIRE
- 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 instrument panel wire connector from the spiral cable.
- 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
5 CHECK SPIRAL CABLE
- Measure the voltage according to the value(s) in the table below.
Standard voltage
REPLACE SPIRAL CABLE
USE SIMULATION METHOD TO CHECK
Short to GND in Driver Side Squib 2nd Step Circuit
DTC B1182/19 Short to GND in Driver Side Squib 2nd Step Circuit
DESCRIPTION
The driver side squib 2nd step circuit consists of the center airbag sensor
assembly, the spiral cable and
the steering ...
Short in Front Passenger Side Squib 2nd Step
Circuit
DTC B1185/57 Short in Front Passenger Side Squib 2nd Step
Circuit
DESCRIPTION
The front passenger side squib 2nd step circuit consists of the center airbag
sensor assembly and the
front passenge ...
Other materials:
Terminals of ECU
1. CHECK POWER BACK DOOR ECU
Disconnect the P13 and P14 ECU connectors, and
check the voltage and resistance of each terminal of
the wire harness side connectors
If the result is not as specified, there may be a
malfunction on the wire harness side.
Reconnect the ECU co ...
Reassembly
1. INSTALL FRONT DOOR WIRE LH
Install the wire with the 2 bolts.
Torque: Reference
8.0 N*m (82 kgf*cm, 71 in.*lbf)
NOTICE:
In order to prevent water leakage, be sure that
the lip of the rubber grommet does not turn up
or is not deformed when installing the wire.
Connect the wir ...
Dtc check / clear
Notice:All the stored dtcs and freeze frame data are
erased if:
1) the ecm is changed from normal mode to check mode
or vice versa; or 2) the ignition switch is turned from on
to acc or off while in check mode.
Before changing modes, always check and make a note
of any dt ...
