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Home >> Scion >> 2013 >> iQ Base >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> Supplemental Restraint System (Diagnostic Codes B1000/31 - B1692/81) (Except Electric) >> Airbag System >> DTC B1642/81: Lost Communication with Side Satellite Sensor Bus RH >> Procedure

DTC B1642/81: Lost Communication with Side Satellite Sensor Bus RH: Procedure

  1. 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 side airbag sensor RH (for front side).

      OK

      The connectors are properly connected.

    NG → CONNECT CONNECTORS PROPERLY 

    OK: Go to next step 

  2. CHECK CONNECTORS 
    1. Disconnect the connectors from the center airbag sensor assembly and side airbag sensor RH (for front side).
    2. Check that the connectors (on the center airbag sensor assembly side and side airbag sensor RH (for front side) side) are not damaged.

      OK

      The connectors are not deformed or damaged.

    NG → REPLACE HARNESS AND CONNECTOR 

    OK: Go to next step 

  3. CHECK SIDE AIRBAG SENSOR RH (FOR FRONT SIDE) CIRCUIT [CENTER AIRBAG SENSOR - SIDE AIRBAG SENSOR RH (FOR FRONT SIDE)] 
    Fig 1: Checking Side Airbag Sensor RH (For Front Side) Circuit [Center Airbag Sensor - Side Airbag Sensor RH (For Front Side)]
    GTY345070Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TEXT IN ILLUSTRATION

    *1 Side Airbag Sensor RH (for Front Side) *2 Center Airbag Sensor Assembly
    *3 Connector E *4 Connector B
    *5 Service Wire - -
    *a Rear view of wire harness connector
    [to Side Airbag Sensor RH (for Front Side)]    		 *b Rear view of wire harness connector
    (to Center Airbag Sensor Assembly)
    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

      Tester Connection Switch Condition Specified Condition
      E8-4 (BBR+) - Body ground Ignition switch ON Below 1 V
      E8-3 (BBR-) - 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 17 and 18 of connector B.
      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

      Tester Connection Condition Specified Condition
      E8-4 (BBR+) - E8-3 (BBR-) 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

      Tester Connection Condition Specified Condition
      E8-4 (BBR+) - E8-3 (BBR-) Always 1 MΩ or higher
      E8-4 (BBR+) - Body ground Always 1 MΩ or higher
      E8-3 (BBR-) - Body ground Always 1 MΩ or higher

    NG → See step   9 

    OK: Go to next step 

  4. CHECK SIDE AIRBAG SENSOR RH (FOR REAR SIDE) CIRCUIT 
    Fig 2: Checking Side Airbag Sensor RH (For Rear Side) Circuit
    GTY344366Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TEXT IN ILLUSTRATION

    *1 Side Airbag Sensor RH (for Front Side) *2 Side Airbag Sensor RH (for Rear Side)
    *3 Connector E *4 Connector B
    *5 Service Wire - -
    *a Rear view of wire harness connector
    [to Side Airbag Sensor RH (for Front Side)]    		 *b Rear view of wire harness connector
    [to Side Airbag Sensor RH (for Rear Side)]
    1. Disconnect the connectors from the side airbag sensor RH (for front side) and side airbag sensor RH (for rear 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

      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
    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 1 and 2 of connector E.
      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

      Tester Connection Condition Specified Condition
      G16-4 (BCR+) - G16-3 (BCR-) Always Below 1 Ω
    9. Disconnect the service wire from connector E.
    10. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      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

    NG → See step   10 

    OK: Go to next step 

  5. CHECK FLOOR WIRE (SIDE AIRBAG SENSOR RH (FOR REAR SIDE) - REAR AIRBAG SENSOR RH) 
    Fig 3: Checking Floor Wire (Side Airbag Sensor RH (For Rear Side) - Rear Airbag Sensor RH)
    GTY345990Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TEXT IN ILLUSTRATION

    *1 Rear Airbag Sensor RH *2 Side Airbag Sensor RH (for Rear Side)
    *3 Floor Wire *4 Connector C
    *5 Connector B *6 Service Wire
    *a Front view of wire harness connector
    (to Rear Airbag Sensor RH)    		 *b Rear view of wire harness connector
    [to Side Airbag Sensor RH (for Rear Side)]
    1. Disconnect the connectors from the side airbag sensor RH (for rear side) and rear airbag sensor RH.
    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

      Tester Connection Switch Condition Specified Condition
      G16-1 (BDR+) - Body ground Ignition switch ON Below 1 V
      G16-2 (BDR-) - 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 2 and 1 of connector C.
      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

      Tester Connection Condition Specified Condition
      G16-1 (BDR+) - G16-2 (BDR-) Always Below 1 Ω
    9. Disconnect the service wire from connector C.
    10. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      G16-1 (BDR+) - G16-2 (BDR-) Always 1 MΩ or higher
      G16-1 (BDR+) - Body ground Always 1 MΩ or higher
      G16-2 (BDR-) - Body ground Always 1 MΩ or higher

    NG → REPLACE FLOOR WIRE 

    OK: Go to next step 

  6. CHECK SIDE AIRBAG SENSOR RH (FOR FRONT SIDE) 
    1. Interchange the side airbag sensor RH (for front side) with side airbag sensor LH (for front side) and connect the connectors to them.
      Fig 4: Checking Side Airbag Sensor RH (For Front Side)
      GTY345467Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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. Refer to DTC CHECK / CLEAR .
    5. Turn the ignition switch off.
    6. Turn the ignition switch to ON, and wait for at least 90 seconds.
    7. Check for DTCs. Refer to DTC CHECK / CLEAR .
      RESULT

      Result Proceed to
      DTC B1647/82 is output A
      DTC B1642/81 and B1647/82 are not output B
      DTC B1642/81 is output C
      TEXT IN ILLUSTRATION

      *1 Side Airbag Sensor LH (for Front Side)
      *2 Center Airbag Sensor Assembly
    8. Turn the ignition switch off.
    9. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    10. Return the side airbag sensor RH (for front side) and side airbag sensor LH (for front side) to their original positions and connect the connectors to them.

    A → See step   11 

    B → See step   12 

    C: Go to next step 

  7. CHECK SIDE AIRBAG SENSOR RH (FOR REAR SIDE) 
    Fig 5: Checking Side Airbag Sensor RH (For Rear Side)
    GTY345711Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Interchange the side airbag sensor RH (for rear side) with side airbag sensor LH (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. Refer to DTC CHECK / CLEAR .
    5. Turn the ignition switch off.
    6. Turn the ignition switch to ON, and wait for at least 90 seconds.
    7. Check for DTCs. Refer to DTC CHECK / CLEAR .
      RESULT

      Result Proceed to
      DTC B1647/82 is output A
      DTC B1642/81 and B1647/82 are not output B
      DTC B1642/81 is output C
      TEXT IN ILLUSTRATION

      *1 Side Airbag Sensor LH (for Rear Side)
      *2 Side Airbag Sensor RH (for Front Side)
    8. Turn the ignition switch off.
    9. Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
    10. Return the side airbag sensor RH (for rear side) and side airbag sensor LH (for rear side) to their original positions and connect the connectors to them.

    A → See step   15 

    B → See step   12 

    C: Go to next step 

  8. CHECK REAR AIRBAG SENSOR RH 
    Fig 6: Checking Rear Airbag Sensor RH
    GTY345768Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    1. Interchange the rear airbag sensor RH with rear airbag sensor LH 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. Refer to DTC CHECK / CLEAR .
    5. Turn the ignition switch off.
    6. Turn the ignition switch to ON, and wait for at least 90 seconds.
    7. Check for DTCs. Refer to DTC CHECK / CLEAR .
      RESULT

      Result Proceed to
      DTC B1642/81 is output A
      DTC B1647/82 is output B
      DTC B1642/81 and B1647/82 are not output C
      TEXT IN ILLUSTRATION

      *1 Rear Airbag Sensor LH
      *2 Side Airbag Sensor RH (for Rear Side)

      HINT: 

      DTCs other than B1642/81 and B1647/82 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, and wait for at least 90 seconds.
    10. Return the rear airbag sensor RH and rear airbag sensor LH to their original positions and connect the connectors to them.

    A → See step   14 

    B → See step   13 

    C → See step   12 

  9. CHECK FLOOR WIRE (CENTER AIRBAG SENSOR - FRONT DOOR WIRE RH) 
    Fig 7: Checking Floor Wire (Center Airbag Sensor - Front Door Wire RH)
    GTY346665Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TEXT IN ILLUSTRATION

    *1 Side Airbag Sensor RH (for Front Side) *2 Center Airbag Sensor Assembly
    *3 Front Door Wire RH *4 Floor Wire
    *5 Connector C *6 Connector B
    *7 Service Wire - -
    *a Front view of wire harness connector
    (to Front Door Wire RH)    		 *b Rear view of wire harness connector
    (to Center Airbag Sensor Assembly)
    1. Disconnect the floor wire connector from the front door wire RH.
    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

      Tester Connection Switch Condition Specified Condition
      EG1-1 (BBR+) - Body ground Ignition switch ON Below 1 V
      EG1-2 (BBR-) - 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 17 and 18 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

      Tester Connection Condition Specified Condition
      EG1-1 (BBR+) - EG1-2 (BBR-) 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

      Tester Connection Condition Specified Condition
      EG1-1 (BBR+) - EG1-2 (BBR-) Always 1 MΩ or higher
      EG1-1 (BBR+) - Body ground Always 1 MΩ or higher
      EG1-2 (BBR-) - Body ground Always 1 MΩ or higher

    NG → REPLACE FLOOR WIRE 

    OK → REPLACE FRONT DOOR WIRE RH 

  10. CHECK FLOOR WIRE (SIDE AIRBAG SENSOR RH (FOR REAR SIDE) - FRONT DOOR WIRE RH) 
    Fig 8: Checking Floor Wire (Side Airbag Sensor RH (Rear Side) - Front Door Wire RH)
    GTY345620Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    TEXT IN ILLUSTRATION

    *1 Side Airbag Sensor RH (for Front Side) *2 Side Airbag Sensor RH (for Rear Side)
    *3 Front Door Wire RH *4 Floor Wire
    *5 Connector C *6 Connector B
    *7 Service Wire - -
    *a Front view of wire harness connector
    (to Front Door Wire RH)    		 *b Rear view of wire harness connector
    [to Side Airbag Sensor RH (for Rear Side)]
    1. Disconnect the floor wire connector from the front door wire RH.
    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

      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
    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

      Tester Connection Condition Specified Condition
      EG1-3 (BCR+) - EG1-4 (BCR-) 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

      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

    NG → REPLACE FLOOR WIRE 

    OK → REPLACE FRONT DOOR WIRE RH 

  11. REPLACE SIDE AIRBAG SENSOR RH (FOR FRONT SIDE). Refer to  REMOVAL 
  12. USE SIMULATION METHOD TO CHECK. Refer to  DIAGNOSIS SYSTEM 
  13. REPLACE REAR AIRBAG SENSOR RH. Refer to  REMOVAL 
  14. REPLACE CENTER AIRBAG SENSOR ASSEMBLY. Refer to  REMOVAL 
  15. REPLACE SIDE AIRBAG SENSOR RH (FOR REAR SIDE). Refer to  REMOVAL 
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