Toyota Sienna Service Manual: Short to GND in Curtain Shield Squib RH Circuit

DTC B1162/81 Short to GND in Curtain Shield Squib RH Circuit

DESCRIPTION

The curtain shield squib RH circuit consists of the center airbag sensor assembly and the curtain shield airbag assembly RH.

The circuit instructs the SRS to deploy when deployment conditions are met.

DTC B1162/81 is recorded when a short to ground is detected in the curtain shield squib RH circuit.

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 CURTAIN SHIELD AIRBAG ASSEMBLY RH (CURTAIN SHIELD SQUIB RH)

1. Turn the ignition switch to the LOCK position.
2.  Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3.  Disconnect the connectors from the curtain shield airbag assembly RH.
4.  Connect the white wire side of SST (resistance 2.1 Ω) to the floor wire No. 2.

CAUTION: Never connect a tester to the curtain shield airbag assembly RH (Curtain shield squib RH) for measurement, as this may lead to a serious injury due to airbag deployment.

SST 09843-18060

5.  Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
6.  Turn the ignition switch to the ON position, and wait for at least 60 seconds.
7.  Clear the DTCs stored in memory (5).
8.  Turn the ignition switch to the LOCK position.
9.  Turn the ignition switch to the ON position, and wait for at least 60 seconds.
10.  Check the DTCs (5).

OK: DTC B1162/81 is not output. HINT: Codes other than DTC B1162/81 may be output at this time, but they are not related to this check.

Go to step 2

REPLACE CURTAIN SHIELD AIRBAG ASSEMBLY RH

2 CHECK FLOOR WIRE NO.2 (CURTAIN SHIELD SQUIB RH CIRCUIT)

1. Turn the ignition switch to the LOCK position.
2.  Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
3.  Disconnect the SST (resistance 2.1 Ω) from the floor wire No. 2.
4.  Disconnect the connector from the center airbag sensor assembly.
5.  Measure the resistance according to the value(s) in the table below.

Standard resistance

REPAIR OR REPLACE FLOOR WIRE NO.2

3 CHECK CENTER AIRBAG SENSOR ASSEMBLY

1. Connect the connectors to the curtain shield airbag assembly RH and the center airbag sensor assembly.
2.  Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
3.  Turn the ignition switch to the ON position, and wait for at least 60 seconds.
4. Clear the DTCs stored in memory (5).
5. Turn the ignition switch to the LOCK position.
6. Turn the ignition switch to the ON position, and wait for at least 60 seconds.
7.  Check the DTCs (5).

OK: DTC B1162/81 is not output. HINT: Codes other than DTC B1162/81 may be output at this time, but they are not related to this check.

REPLACE CENTER AIRBAG SENSOR ASSEMBLY

USE SIMULATION METHOD TO CHECK