Toyota Sienna Service Manual: Short to B+ in Side Squib LH Circuit

Toyota Sienna Service Manual / Supplemental restraint system / Airbag system / Diagnostic trouble code chart / 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)

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)

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

Standard voltage

REPAIR OR REPLACE FLOOR WIRE

3 CHECK CENTER AIRBAG SENSOR ASSEMBLY

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

Short to GND in Side Squib LH Circuit

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 ...

Seat Belt Buckle Switch LH Circuit Malfunction

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:

Front washer motor
ON-VEHICLE INSPECTION 1. INSPECT FRONT WASHER MOTOR Operation Check Pour the water into the washer jar with the windshield washer motor and pump installed to the washer jar assembly. Connect the battery (+) to the terminal 1 of the windshield washer motor and ...

Adjustment
CAUTION: Do not stare at the luminous portion of the laser during adjustment. The intensity of the laser light is low, but it may result in loss of sight. If operation is not carried out as specified, there may be a risk that you are exposed to hazardous radiation. HINT: ...

Installation
HINT: Use the same procedures for the RH side and LH side. The procedures listed below are for the LH side. 1. INSTALL CURTAIN SHIELD AIRBAG ASSEMBLY LH Install the curtain shield airbag assembly LH with the 13 bolts in the order shown in the illustration. Torque: 14 N*m ...