AIRBAG SYSTEM, Diagnostic DTC:B1625/22

DESCRIPTION

The side collision sensor LH circuit (to determine deployment of the front seat airbag assembly LH, curtain shield airbag assembly LH and front seat outer belt assembly LH) is composed of the airbag sensor assembly, side airbag sensor assembly LH and rear airbag sensor LH.

The side airbag sensor assembly LH and rear airbag sensor LH detect impacts to the vehicle and send signals to the airbag sensor assembly to determine if the airbags and pretensioners should be deployed.

DTC B1625/22 is stored when a malfunction is detected in the side collision sensor LH circuit.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

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, side airbag sensor assembly LH and rear airbag sensor LH.

      OK
      The connectors are properly connected.

      Tech Tips

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

   4. Disconnect the connectors from the airbag sensor assembly, side airbag sensor assembly LH and rear airbag sensor LH.

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

      OK
      The terminals are not deformed or damaged.

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE FLOOR WIRE

   OK

2. CHECK FLOOR WIRE (OPEN)

   
   
   1. 

      *1	Side Airbag Sensor Assembly LH
      *2	Airbag Sensor Assembly
      *3	Floor Wire
      *4	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 LH)

      Using a service wire, connect terminals 8 (BBL+) and 15 (BBL-) of connector B.

      Note

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition L9-4 (BBL+) - L9-3 (BBL-) Always Below 1 Ω

   3. Disconnect the service wire from connector B.

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE FLOOR WIRE

   OK

3. CHECK FLOOR WIRE (SHORT)

   
   
   1. 

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition L9-4 (BBL+) - L9-3 (BBL-) Always 1 MΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE FLOOR WIRE

   OK

4. CHECK FLOOR WIRE (SHORT TO B+)

   
   
   1. 

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

      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 Condition Specified Condition L9-4 (BBL+) - Body ground Ignition switch ON Below 1 V L9-3 (BBL-) - Body ground Ignition switch ON Below 1 V

   4. Turn the ignition switch off.

   5. 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.

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE FLOOR WIRE

   OK

5. CHECK FLOOR WIRE (SHORT TO GROUND)

   
   
   1. 

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition L9-4 (BBL+) - Body ground Always 1 MΩ or higher L9-3 (BBL-) - Body ground Always 1 MΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE FLOOR WIRE

   OK

6. CHECK FLOOR WIRE (OPEN)

   
   
   1. 

      *1	Rear Airbag Sensor LH
      *2	Side Airbag Sensor Assembly LH
      *3	Floor Wire
      *4	Service Wire
      *a	Front view of wire harness connector (to Side Airbag Sensor Assembly LH)
      *b	Front view of wire harness connector (to Rear Airbag Sensor LH)

      Using a service wire, connect terminals 2 (BCL+) and 1 (BCL-) of connector C.

      Note

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

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

      Standard Resistance
      Tester Connection Condition Specified Condition L9-1 (BCL+) - L9-2 (BCL-) Always Below 1 Ω

   3. Disconnect the service wire from connector C.

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE FLOOR WIRE

   OK

7. CHECK FLOOR WIRE (SHORT)

   
   
   1. 

      *1	Rear Airbag Sensor LH
      *2	Side Airbag Sensor Assembly LH
      *3	Floor Wire
      *a	Front view of wire harness connector (to Side Airbag Sensor Assembly LH)

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

      Standard Resistance
      Tester Connection Condition Specified Condition L9-1 (BCL+) - L9-2 (BCL-) Always 1 MΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE FLOOR WIRE

   OK

8. CHECK FLOOR WIRE (SHORT TO B+)

   
   
   1. 

      *1	Rear Airbag Sensor LH
      *2	Side Airbag Sensor Assembly LH
      *3	Floor Wire
      *a	Front view of wire harness connector (to Side Airbag Sensor Assembly LH)

      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 Condition Specified Condition L9-1 (BCL+) - Body ground Ignition switch ON Below 1 V L9-2 (BCL-) - Body ground Ignition switch ON Below 1 V

   4. Turn the ignition switch off.

   5. 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.

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE FLOOR WIRE

   OK

9. CHECK FLOOR WIRE (SHORT TO GROUND)

   
   
   1. 

      *1	Rear Airbag Sensor LH
      *2	Side Airbag Sensor Assembly LH
      *3	Floor Wire
      *a	Front view of wire harness connector (to Side Airbag Sensor Assembly LH)

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

      Standard Resistance
      Tester Connection Condition Specified Condition L9-1 (BCL+) - Body ground Always 1 MΩ or higher L9-2 (BCL-) - Body ground Always 1 MΩ or higher

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE FLOOR WIRE

   OK

10. CHECK SIDE AIRBAG SENSOR ASSEMBLY LH

    
    
    1. 

       *1	Side Airbag Sensor Assembly RH
       *2	Airbag Sensor Assembly

       Connect the connectors to the rear airbag sensor LH and airbag sensor assembly.

    2. Interchange the side airbag sensor assembly LH with RH and connect the connectors.

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

    4. Clear the DTCs stored in memory.

       Click here

       
       Body Electrical > SRS Airbag > Clear DTCs

    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

       
       Body Electrical > SRS Airbag > Trouble Codes

       Tech Tips

       Codes other than DTCs B1620/21 and B1625/22 may be output at this time, but they are not related to this check.

       Result
       Result Proceed to DTC B1625/22 is output. A DTC B1620/21 is output. B DTCs B1620/21 and B1625/22 are not output. C

    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 LH and RH to their original positions and connect the connectors.

    
    

    B

    REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

    A

11. CHECK REAR AIRBAG SENSOR LH

    
    
    1. 

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

       Disconnect the connector from the rear airbag sensor LH.

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

    3. Clear the DTCs stored in memory.

       Click here

       
       Body Electrical > SRS Airbag > Clear DTCs

    4. Turn the ignition switch off.

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

    6. Check for DTCs.

       Click here

       
       Body Electrical > SRS Airbag > Trouble Codes

       OK
       DTC B1625/22 is not output.

       Tech Tips

       Codes other than DTC B1625/22 may be output at this time, but they are not related to this check.

       Result
       Proceed to OK NG

    
    

    OK

    REPLACE REAR AIRBAG SENSOR LH Click here

    NG

    REPLACE AIRBAG SENSOR ASSEMBLY Click here