RX400h · Service Manual RESTRAINTS

B1162/81

Diagnostic trouble codes

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.
DTC No.
 DTC Detecting Condition
 Trouble Area
B1162/81
  1. Short circuit in curtain shield squib RH wire harness (to ground)
  2. Curtain shield squib RH malfunction
  3. Center airbag sensor assembly malfunction
  1. Curtain shield airbag assembly RH (Curtain shield squib RH)
  2. Center airbag sensor assembly
  3. Floor wire

WIRING DIAGRAM

Click here.

INSPECTION PROCEDURE


1. CHECK CURTAIN SHIELD AIRBAG ASSEMBLY RH (CURTAIN SHIELD SQUIB RH)

  1. C111675E01
    Turn the ignition switch to the LOCK position.

  1. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

  1. Disconnect the connectors from the curtain shield airbag assembly RH.

  1. Connect the white wire side of SST (resistance 2.1 Ω) to the floor wire.

    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.

    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  

  1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

  1. Turn the ignition switch to the ON position, and wait for at least 60 seconds.

  1. Clear the DTCs stored in memory (Click here).

  1. Turn the ignition switch to the LOCK position.

  1. Turn the ignition switch to the ON position, and wait for at least 60 seconds.

  1. Check the DTCs (Click here).

    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.



 NG
Go to step 2
OK

REPLACE CURTAIN SHIELD AIRBAG ASSEMBLY RH

2. CHECK CONNECTORS

  1. Turn the ignition switch to the LOCK position.

  1. Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.

  1. Disconnect the SST (resistance 2.1 Ω) from the floor wire.

  1. Check that the floor wire connector (on the curtain shield airbag assembly RH side) is not damaged.

    OK:
    The lock button is not disengaged, and the claw of the lock is not deformed or damaged.



 NG
REPAIR OR REPLACE FLOOR WIRE
OK


3. CHECK FLOOR WIRE (CURTAIN SHIELD SQUIB RH CIRCUIT)

  1. C111666E01
    Disconnect the connector from the center airbag sensor assembly.

  1. Measure the resistance according to the value(s) in the table below.

    Resistance:
    Tester connection
    		 Condition
    		 Specified condition
    C16-1 (ICR+) -
    Body ground
    		 Always
    		 1 MΩ or higher
    C16-2 (ICR-) -
    Body ground
    		 Always
    		 1 MΩ or higher



NG
REPAIR OR REPLACE FLOOR WIRE
OK


4. CHECK CENTER AIRBAG SENSOR ASSEMBLY

  1. C111676E01
    Connect the connectors to the curtain shield airbag assembly RH and the center airbag sensor assembly.

  1. Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.

  1. Turn the ignition switch to the ON position, and wait for at least 60 seconds.

  1. Clear the DTCs stored in memory (Click here).

  1. Turn the ignition switch to the LOCK position.

  1. Turn the ignition switch to the ON position, and wait for at least 60 seconds.

  1. Check the DTCs (Click here).

    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.



 NG
REPLACE CENTER AIRBAG SENSOR ASSEMBLY
OK

USE SIMULATION METHOD TO CHECK


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