DTC    B1650/49    Short in Driver Side Knee Airbag Squib Circuit

for Preparation Click here


DESCRIPTION

The driver side knee airbag squib circuit consists of the center airbag sensor assembly and the driver side knee airbag assembly.
The circuit instructs the SRS to deploy when deployment conditions are met.
DTC B1650/49 is recorded when a short circuit is detected in the driver side knee airbag squib circuit.

DTC No.
DTC Detecting Condition
Trouble Area
B1650/49
  1. Short circuit between DK+ wire harness and DK- wire harness of driver side knee airbag squib
  2. Driver side knee airbag squib malfunction
  3. Center airbag sensor assembly malfunction
  1. Driver side knee airbag assembly (Driver side knee airbag squib)
  2. Center airbag sensor assembly
  3. Floor wire No.2 (LHD)
  4. Floor wire (RHD)

WIRING DIAGRAM


H043378E01


INSPECTION PROCEDURE

1.CHECK VEHICLE STEERING POSITION

Result:
A:
LHD
B:
RHD



B
Go to step 6
A


2.CHECK DRIVER SIDE KNEE AIRBAG ASSEMBLY (DRIVER SIDE KNEE AIRBAG SQUIB)


    C111702E05

  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 connectors from the driver side knee airbag assembly.

  1. Connect the white wire side of SST (resistance 2.1 Ω) to the floor wire No.2.

    CAUTION:
    Never connect a tester to the driver side knee airbag assembly (Driver side knee airbag 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  

  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 B1650/49 is not output.

    HINT:
    Codes other than DTC B1650/49 may be output at this time, but they are not related to this check.



NG
Go to step 3
OK

REPLACE DRIVER SIDE KNEE AIRBAG ASSEMBLY 

3.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 No.2.

  1. Check that the floor wire No.2 connector (on the driver side knee airbag assembly 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 NO.2
OK


4.CHECK FLOOR WIRE NO.2 (DRIVER SIDE KNEE AIRBAG SQUIB CIRCUIT)


    C111703E03

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

  1. Release the activation prevention mechanism built into connector "B" (Click here).

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

    Resistance:
    Tester connection
    		Condition
    		Specified condition
    K8-1 (DK+) - K8-2 (DK-)
    		Always
    		1 MΩ or higher



NG
REPAIR OR REPLACE FLOOR WIRE NO.2
OK


5.CHECK CENTER AIRBAG SENSOR ASSEMBLY


    C111704E01

  1. Connect the connectors to the driver side knee airbag asembly 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 B1650/49 is not output.

    HINT:
    Codes other than DTC B1650/49 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 

6.CHECK DRIVER SIDE KNEE AIRBAG ASSEMBLY (DRIVER SIDE KNEE AIRBAG SQUIB)


    C114783E01

  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 connectors from the driver side knee airbag assembly.

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

    CAUTION:
    Never connect a tester to the driver side knee airbag assembly (Driver side knee airbag 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  

  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 B1650/49 is not output.

    HINT:
    Codes other than DTC B1650/49 may be output at this time, but they are not related to this check.



NG
Go to step 7
OK

REPLACE DRIVER SIDE KNEE AIRBAG ASSEMBLY 

7.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 driver side knee airbag assembly 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


8.CHECK FLOOR WIRE (DRIVER SIDE KNEE AIRBAG SQUIB CIRCUIT)


    C114784E01

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

  1. Release the activation prevention mechanism built into connector "B" (Click here).

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

    Resistance:
    Tester connection
    		Condition
    		Specified condition
    K8-1 (DK+) - K8-2 (DK-)
    		Always
    		1 MΩ or higher



NG
REPAIR OR REPLACE FLOOR WIRE
OK


9.CHECK CENTER AIRBAG SENSOR ASSEMBLY


    C114785E01

  1. Connect the connectors to the driver side knee airbag asembly 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 B1650/49 is not output.

    HINT:
    Codes other than DTC B1650/49 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