AIRBAG SYSTEM, Diagnostic DTC:B1638/82

DTC Code DTC Name
B1638/82 Passenger Side Rear Airbag Sensor Initialization Incomplete

DESCRIPTION

The circuit for the passenger side - side collision sensor (to determine deployment of the curtain shield airbag (passenger side)) is composed of the center airbag sensor assembly and passenger side - side airbag sensor (for rear side).

The passenger side - side airbag sensor (for rear side) detect impacts to the vehicle and send signals to the center airbag sensor assembly to determine if the airbag should be deployed.

DTC B1638/82 is recorded when a malfunction is detected in the circuit for the passenger side - side collision sensor (to determine deployment of the curtain shield airbag (passenger side)).

DTC No. DTC Detection Condition Trouble Area
B1638/82

When one of following conditions is met:


  • The center airbag sensor assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal in the circuit for the passenger side - side collision sensor (to determine deployment of the curtain shield airbag (passenger side)) for 2 seconds.

  • Passenger side - side airbag sensor (for front side) malfunction

  • Passenger side - side airbag sensor (for rear side) malfunction

  • Passenger side rear airbag sensor

  • Center airbag sensor assembly malfunction

  • Floor wire

  • Front door wire (passenger side)

  • Passenger side - side airbag sensor (for front side)

  • Passenger side - side airbag sensor (for rear side)

  • Passenger side rear airbag sensor

  • Center airbag sensor assembly

WIRING DIAGRAM

A0119GWE03
A0119GWE04

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK PAST DTC


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

    2. Turn the ignition switch off.

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

    4. Check the past DTCs Click here.

      Result
      Result Proceed to
      DTC B1632/81 is output A
      DTC B1637/82 is output B
      DTC B1632/81 and B1637/82 are not output C

    A

    GO TO DTC B1632/81 Click here

    B

    GO TO DTC B1637/82 Click here

    C

  2. CHECK CONNECTION OF CONNECTORS


    1. Turn the ignition switch off.

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

    3. Check that the connectors are properly connected to the center airbag sensor assembly and passenger side - side airbag sensor (for front side).

      OK
      The connectors are properly connected.

    NG

    CONNECT CONNECTORS PROPERLY

    OK

  3. CHECK CONNECTORS


    1. Disconnect the connectors from the center airbag sensor assembly and passenger side - side airbag sensor (for front side).

    2. Check that the connectors (on the center airbag sensor assembly side and passenger side - side airbag sensor (for front side) side) are not damaged.

      OK
      The connectors are not deformed or damaged.

    NG

    REPLACE HARNESS AND CONNECTOR

    OK

  4. CHECK PASSENGER SIDE - SIDE AIRBAG SENSOR (FOR FRONT SIDE)


    1. A0116WCE01
      Text in Illustration
      *1 Driver Side - Side Airbag Sensor (for Front Side)
      *2 Center Airbag Sensor Assembly

      Interchange the passenger side - side airbag sensor (for front side) with the driver side - side airbag sensor (for front side) and connect the connectors to them.

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

    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 90 seconds.

    7. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1633/81 is output A
      DTC B1633/81 and B1638/82 are not output B
      DTC B1638/82 is output C

    A

    REPLACE PASSENGER SIDE - SIDE AIRBAG SENSOR (FOR FRONT SIDE) Click here

    B

    USE SIMULATION METHOD TO CHECK Click here

    C

  5. CHECK PASSENGER SIDE - SIDE AIRBAG SENSOR (FOR REAR SIDE) CIRCUIT

    A0119P8E02
    Text in Illustration
    *1 for LHD *6 Passenger Side - Side Airbag Sensor (for Rear Side)
    *2 for RHD *7 Connector E
    *3

    Rear view of wire harness connector

    (to Passenger Side - Side Airbag Sensor (for Front Side))

    		 *8 Connector B
    *4

    Rear view of wire harness connector

    (to Passenger Side - Side Airbag Sensor (for Rear Side))

    		 *9 Service Wire
    *5 Passenger Side - Side Airbag Sensor (for Front Side) - -

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

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      G16-4 (BCR+) - Body ground Ignition switch ON Below 1 V
      G16-3 (BCR-) - Body ground Ignition switch ON Below 1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      G17-4 (BCL+) - Body ground Ignition switch ON Below 1 V
      G17-3 (BCL-) - Body ground Ignition switch ON Below 1 V

    4. Turn the ignition switch off.

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

    6. Using a service wire, connect terminals 1 and 2 of connector E.

      Note

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

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      G16-4 (BCR+) - G16-3 (BCR-) Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      G17-4 (BCL+) - G17-3 (BCL-) Always Below 1 Ω

    8. Disconnect the service wire from connector B.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      G16-4 (BCR+) - G16-3 (BCR-) Always 1 MΩ or higher
      G16-4 (BCR+) - Body ground Always 1 MΩ or higher
      G16-3 (BCR-) - Body ground Always 1 MΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      G17-4 (BCL+) - G17-3 (BCL-) Always 1 MΩ or higher
      G17-4 (BCL+) - Body ground Always 1 MΩ or higher
      G17-3 (BCL-) - Body ground Always 1 MΩ or higher

    NG

    CHECK FLOOR WIRE (SIDE AIRBAG SENSOR (REAR SIDE) - FRONT DOOR WIRE) Click here

    OK

  6. CHECK PASSENGER SIDE REAR AIRBAG SENSOR CIRCUIT (SIDE AIRBAG SENSOR (FOR REAR SIDE ) - REAR AIRBAG SENSOR)

    A011B2JE02
    Text in Illustration
    *1 for LHD *6 Passenger Side - Side Airbag Sensor (for Rear Side)
    *2 for RHD *7 Floor Wire
    *3

    Rear view of wire harness connector

    (to Passenger Side Rear Airbag Sensor)

    		 *8 Connector C
    *4

    Rear view of wire harness connector

    (to Passenger Side - Side Airbag Sensor (for Rear Side))

    		 *9 Connector B
    *5 Passenger Side Rear Airbag Sensor *10 Service Wire

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

    2. Turn the ignition switch to ON.

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

      Standard Voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      G16-1 (BER+) - Body ground Ignition switch ON Below 1 V
      G16-2 (BER-) - Body ground Ignition switch ON Below 1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      G17-1 (BEL+) - Body ground Ignition switch ON Below 1 V
      G17-2 (BEL-) - Body ground Ignition switch ON Below 1 V

    4. Turn the ignition switch off.

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

    6. Using a service wire, connect terminals 2 and 1 of connector C.

      Note

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

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      G16-1 (BER+) - G16-2 (BER-) Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      G17-1 (BEL+) - G17-2 (BEL-) Always Below 1 Ω

    8. Disconnect the service wire from connector C.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      G16-1 (BER+) - G16-2 (BER-) Always 1 MΩ or higher
      G16-1 (BER+) - Body ground Always 1 MΩ or higher
      G16-2 (BER-) - Body ground Always 1 MΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      G17-1 (BEL+) - G17-2 (BEL-) Always 1 MΩ or higher
      G17-1 (BEL+) - Body ground Always 1 MΩ or higher
      G17-2 (BEL-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE FLOOR WIRE

    OK

  7. CHECK PASSENGER SIDE - SIDE AIRBAG SENSOR (FOR REAR SIDE)

    A0118YEE01
    Text in Illustration
    *1 Driver Side - Side Airbag Sensor (for Rear Side)
    *2 Passenger Side - Side Airbag Sensor (for Front Side)

    1. Interchange the passenger side - side airbag sensor (for rear side) with the driver side - side airbag sensor (for rear side) and connect the connectors to them.

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

    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 90 seconds.

    7. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1633/81 is output A
      DTC B1633/81 and B1638/82 are not output B
      DTC B1638/82 is output C

    A

    REPLACE PASSENGER SIDE - SIDE AIRBAG SENSOR (FOR REAR SIDE) Click here

    B

    USE SIMULATION METHOD TO CHECK Click here

    C

  8. CHECK PASSENGER SIDE REAR AIRBAG SENSOR

    A0117TGE13
    Text in Illustration
    *1 Driver Side Rear Airbag Sensor
    *2 Passenger Side - Side Airbag Sensor (for Rear Side)

    1. Interchange the passenger side rear airbag sensor with the driver side rear airbag sensor and connect the connectors to them.

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

    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 90 seconds.

    7. Check for DTCs Click here.

      Result
      Result Proceed to
      DTC B1638/82 is output A
      DTC B1633/81 is output B
      DTC B1633/81 and B1638/82 are not output C

      Tech Tips

      DTCs other than B1633/81 and B1638/82 may be output at this time, but they are not related to this check.


    A

    REPLACE CENTER AIRBAG SENSOR ASSEMBLY Click here

    B

    REPLACE PASSENGER SIDE REAR AIRBAG SENSOR Click here

    C

    USE SIMULATION METHOD TO CHECK Click here

  9. CHECK FLOOR WIRE (SIDE AIRBAG SENSOR (REAR SIDE) - FRONT DOOR WIRE)

    A0119PVE02
    Text in Illustration
    *1 for LHD *7 Front Door Wire (Passenger Side)
    *2 for RHD *8 Floor Wire
    *3

    Front view of wire harness connector

    (to Front Door Wire (Passenger Side))

    		 *9 Connector C
    *4

    Rear view of wire harness connector

    (to Passenger Side - Side Airbag Sensor (for Rear Side))

    		 *10 Connector B
    *5 Passenger Side - Side Airbag Sensor (for Front Side) *11 Service Wire
    *6 Passenger Side - Side Airbag Sensor (for Rear Side) - -

    1. Disconnect the floor wire connector from the front door wire (passenger side).

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

    3. Turn the ignition switch to ON.

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

      Standard Voltage
      for LHD
      Tester Connection Switch Condition Specified Condition
      EG1-3 (BCR+) - Body ground Ignition switch ON Below 1 V
      EG1-4 (BCR-) - Body ground Ignition switch ON Below 1 V
      for RHD
      Tester Connection Switch Condition Specified Condition
      FG1-3 (BCL+) - Body ground Ignition switch ON Below 1 V
      FG1-4 (BCL-) - Body ground Ignition switch ON Below 1 V

    5. Turn the ignition switch off.

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

    7. Using a service wire, connect terminals 3 and 4 of connector B.

      Note

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

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      EG1-3 (BCR+) - EG1-4 (BCR-) Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      FG1-3 (BCL+) - FG1-4 (BCL-) Always Below 1 Ω

    9. Disconnect the service wire from connector B.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      EG1-3 (BCR+) - EG1-4 (BCR-) Always 1 MΩ or higher
      EG1-3 (BCR+) - Body ground Always 1 MΩ or higher
      EG1-4 (BCR-) - Body ground Always 1 MΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      FG1-3 (BCL+) - FG1-4 (BCL-) Always 1 MΩ or higher
      FG1-3 (BCL+) - Body ground Always 1 MΩ or higher
      FG1-4 (BCL-) - Body ground Always 1 MΩ or higher

    NG

    REPLACE FLOOR WIRE

    OK

    REPLACE FRONT DOOR WIRE (PASSENGER SIDE)