AIRBAG SYSTEM(w/o Curtain Shield Airbag), Diagnostic DTC:B1622/81, B1623/81

DESCRIPTION

The side collision sensor RH circuit (to determine deployment of the front seat side airbag assembly RH) is composed of the airbag sensor assembly and side airbag sensor assembly RH.

The side airbag sensor assembly RH detects impacts to the vehicle and sends signals to the airbag sensor assembly to determine if the airbag should be deployed.

This DTC is stored when a malfunction is detected for the side collision sensor RH circuit (to determine deployment of the front seat side airbag assembly RH).

WIRING DIAGRAM

PROCEDURE

1. CHECK CONNECTORS

   
   

   1. Turn the ignition switch off.

   2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

   3. Check that the connectors are properly connected to the airbag sensor assembly and side airbag sensor assembly RH.

      OK
      The connectors are properly connected.

      Tech Tips

      If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

   4. Disconnect the connectors from the airbag sensor assembly and side airbag sensor assembly RH.

   5. Check that the terminals of connectors are not damaged.

      OK
      The terminals are not deformed or damaged.

   
   

   NG

   REPLACE FLOOR WIRE

   OK

2. CHECK FLOOR WIRE (OPEN)

   
   

   1. Using a service wire, connect terminals 8 (BBR+) and 11 (BBR-) of connector B.

      

      Text in Illustration

      *1	Side Airbag Sensor Assembly RH	*2	Airbag Sensor Assembly
      *3	Floor Wire	*4	Connector B
      *5	Connector C	*6	Service Wire
      *a	Front view of wire harness connector (to Airbag Sensor Assembly)	*b	Front view of wire harness connector (to Side Airbag Sensor Assembly RH)

      Note

      Do not forcibly insert the service wire into the terminals of the connector when connecting.

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

      Standard Resistance
      Tester Connection Condition Specified Condition K49-2 (BBR+) - K49-1 (BBR-) Always Below 1 Ω

   
   

   NG

   REPLACE FLOOR WIRE

   OK

3. CHECK FLOOR WIRE (SHORT)

   
   
   1. 

      Text in Illustration

      *1	Side Airbag Sensor Assembly RH
      *2	Airbag Sensor Assembly
      *3	Floor Wire
      *4	Connector C
      *a	Front view of wire harness connector (to Side Airbag Sensor Assembly RH)

      Disconnect the service wire from connector B.

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

      Standard Resistance
      Tester Connection Condition Specified Condition K49-2 (BBR+) - K49-1 (BBR-) Always 1 MΩ or higher

   
   

   NG

   REPLACE FLOOR WIRE

   OK

4. CHECK FLOOR WIRE (SHORT TO B+)

   
   
   1. 

      Text in Illustration

      *1	Side Airbag Sensor Assembly RH
      *2	Airbag Sensor Assembly
      *3	Floor Wire
      *4	Connector C
      *a	Front view of wire harness connector (to Side Airbag Sensor Assembly RH)

      Connect the cable to the negative (-) battery terminal.

   2. Turn the ignition switch to ON.

   3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage
      Tester Connection Switch Condition Specified Condition K49-2 (BBR+) - Body ground Ignition switch ON Below 1 V K49-1 (BBR-) - Body ground Ignition switch ON Below 1 V

   
   

   NG

   REPLACE FLOOR WIRE

   OK

5. CHECK FLOOR WIRE (SHORT TO GROUND)

   
   
   1. 

      Text in Illustration

      *1	Side Airbag Sensor Assembly RH
      *2	Airbag Sensor Assembly
      *3	Floor Wire
      *4	Connector C
      *a	Front view of wire harness connector (to Side Airbag Sensor Assembly RH)

      Turn the ignition switch off.

   2. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

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

      Standard Resistance
      Tester Connection Condition Specified Condition K49-2 (BBR+) - Body ground Always 1 MΩ or higher K49-1 (BBR-) - Body ground Always 1 MΩ or higher

   
   

   NG

   REPLACE FLOOR WIRE

   OK

6. CHECK SIDE AIRBAG SENSOR ASSEMBLY RH

   

   Text in Illustration

   *1	Side Airbag Sensor Assembly LH
   *2	Airbag Sensor Assembly

   
   

   1. Interchange the side airbag sensor assembly RH with the side airbag sensor assembly LH and connect the connectors to them.

   2. Connect the cable to the negative (-) battery terminal.

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

   4. Clear the DTCs stored in the memory Click here.

   5. Turn the ignition switch off.

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

   7. Check for DTCs Click here.

      Result

      Result	Proceed to
      DTC B1622/81, B1623/81, B1627/81 and B1628/82 are not output.	A
      DTC B1627/81 or B1628/82 is output.	B
      DTC B1622/81 or B1623/81 is output.	C

      Tech Tips

      Codes other than DTCs B1622/81, B1623/81, B1627/81 and B1628/82 may be output at this time, but they are not related to this check.

   8. Turn the ignition switch off.

   9. Disconnect the cable from the negative (-) battery terminal.

      CAUTION:

      Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

   10. Return the side airbag sensor assembly RH and the side airbag sensor assembly LH to their original positions and connect the connectors to them.

   
   

   A

   USE SIMULATION METHOD TO CHECK Click here

   B

   REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH Click here

   C

   REPLACE AIRBAG SENSOR ASSEMBLY Click here