Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

Vehicle Interior. Yaris. Ncp93, 131
Supplemental Restraint Systems. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK PAST DTC

CHECK FOR DTC

CHECK CONNECTION OF CONNECTORS

CHECK CONNECTORS

CHECK FLOOR WIRE (CENTER AIRBAG SENSOR - SIDE AIRBAG SENSOR RH)

CHECK CONNECTION OF CONNECTORS

CHECK CONNECTORS

CHECK FLOOR WIRE (SIDE AIRBAG SENSOR RH - REAR AIRBAG SENSOR RH)

CHECK SIDE AIRBAG SENSOR RH

CHECK REAR AIRBAG SENSOR RH

CHECK CONNECTION OF CONNECTORS

CHECK CONNECTORS

CHECK FLOOR WIRE (CENTER AIRBAG SENSOR - SIDE AIRBAG SENSOR LH)

CHECK CONNECTION OF CONNECTOR

CHECK CONNECTORS

CHECK FLOOR WIRE (SIDE AIRBAG SENSOR LH - REAR AIRBAG SENSOR LH)

CHECK SIDE AIRBAG SENSOR LH

CHECK REAR AIRBAG SENSOR LH

DTC B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

DTC B1628/82 Front Passenger Side - Side Airbag Sensor Assembly Initialization Incomplete

DTC B1643/81 Driver Side Satellite Sensor Bus Initialization Incomplete

DTC B1648/82 Front Passenger Side Satellite Sensor Bus Initialization Incomplete


DESCRIPTION

The circuit for the side collision sensor LH or RH (to determine deployment of the front seat side airbag LH or RH and curtain shield airbag LH or RH) is composed of the center airbag sensor assembly, side airbag sensor LH or RH, and rear airbag sensor LH or RH.
The side airbag sensor LH or RH and rear airbag sensor LH or RH detect impacts to the vehicle and send signals to the center airbag sensor assembly to determine if the airbag should be deployed.
DTC B1623/81, B1628/82, B1643/81 or B1648/82 is recorded when a malfunction is detected in the circuit for the side collision sensor LH or RH (to determine deployment of the front seat side airbag LH or RH and curtain shield airbag LH or RH).

DTC Code
Detection Condition
Trouble Area
B1623/81
B1643/81
When one of following conditions is met:
  1. 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 side collision sensor LH (to determine deployment of the front seat side airbag LH and curtain shield airbag LH) for 2 seconds.
  2. Side airbag sensor LH malfunction
  3. Rear airbag sensor LH malfunction
  4. Center airbag sensor assembly malfunction
  1. Floor wire
  2. Side airbag sensor LH
  3. Rear airbag sensor LH
  4. Center airbag sensor assembly
B1628/82
B1648/82
When one of following conditions is met:
  1. 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 side collision sensor RH (to determine deployment of the front seat side airbag RH and curtain shield airbag RH) for 2 seconds.
  2. Side airbag sensor RH malfunction
  3. Rear airbag sensor RH malfunction
  4. Center airbag sensor assembly malfunction
  1. Floor wire
  2. Side airbag sensor RH
  3. Rear airbag sensor RH
  4. Center airbag sensor assembly

WIRING DIAGRAM


Yaris. Ncp93, 131.Supplemental Restraint Systems.Airbag System (For Sedan). Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete


Yaris. Ncp93, 131.Supplemental Restraint Systems.Airbag System (For Sedan). Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete


INSPECTION PROCEDURE

1.CHECK PAST DTC

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

  1. Turn the ignition switch off.

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

  1. Check the past DTCs (YARIS_NCP93 RM000000XFE0D2X.html).

    Result:
    Result
    		Proceed to
    DTC B1622/81 or B1627/82 is output
    		A
    DTC B1632/81 or B1637/82 is output
    		B
    DTC B1622/81, B1627/82, B1632/81 and B1637/82 are not output
    		C


A
GO TO DTC B1622

B
GO TO DTC B1632
C


2.CHECK FOR DTC

  1. Turn the ignition switch off.

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

  1. Check for DTCs (YARIS_NCP93 RM000000XFE0D2X.html).

    Result:
    Result
    		Proceed to
    DTC B1623/81, B1628/82, B1643/81 and B1648/82 are not output
    		A
    DTC B1623/81 or B1643/81 is output
    		B
    DTC B1628/82 or B1648/82 is output
    		C


A
USE SIMULATION METHOD TO CHECK

B
Go to step 11
C


3.CHECK CONNECTION OF CONNECTORS

  1. Turn the ignition switch off.

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

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

    OK:
    The connectors are properly connected.


NG
CONNECT CONNECTORS
OK


4.CHECK CONNECTORS

  1. Disconnect the connectors from the center airbag sensor assembly and side airbag sensor RH.

  1. Check that the connectors (on the center airbag sensor assembly side and side airbag sensor RH side) are not damaged.

    OK:
    The connectors are not deformed or damaged.


NG
REPLACE FLOOR WIRE
OK


5.CHECK FLOOR WIRE (CENTER AIRBAG SENSOR - SIDE AIRBAG SENSOR RH)

Yaris. Ncp93, 131.Supplemental Restraint Systems.Airbag System (For Sedan). Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

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

  1. Turn the ignition switch to ON.

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

    Standard voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    J16-4 (BBR+) - Body ground
    		Ignition switch ON
    		Below 1 V
    J16-3 (BBR-) - Body ground
    		Ignition switch ON
    		Below 1 V

  1. Turn the ignition switch off.

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

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

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

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    J16-4 (BBR+) - J16-3 (BBR-)
    		Always
    		Below 1 Ω

  1. Disconnect the service wire from connector B.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    J16-4 (BBR+) - J16-3 (BBR-)
    		Always
    		1 MΩ or higher
    J16-4 (BBR+) - Body ground
    		Always
    		1 MΩ or higher
    J16-3 (BBR-) - Body ground
    		Always
    		1 MΩ or higher


NG
REPLACE FLOOR WIRE
OK


6.CHECK CONNECTION OF CONNECTORS

  1. Check that the connector is properly connected to the rear airbag sensor RH.

    OK:
    The connector is properly connected.


NG
CONNECT CONNECTOR
OK


7.CHECK CONNECTORS

  1. Disconnect the connectors from the side airbag sensor RH and rear airbag sensor RH.

  1. Check that the connector (on the rear airbag sensor RH side) is not damaged.

    OK:
    The connector is not deformed or damaged.


NG
REPLACE FLOOR WIRE
OK


8.CHECK FLOOR WIRE (SIDE AIRBAG SENSOR RH - REAR AIRBAG SENSOR RH)

Yaris. Ncp93, 131.Supplemental Restraint Systems.Airbag System (For Sedan). Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

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

  1. Turn the ignition switch to ON.

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

    Standard voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    J16-1 (BCR+) - Body ground
    		Ignition switch ON
    		Below 1 V
    J16-2 (BCR-) - Body ground
    		Ignition switch ON
    		Below 1 V

  1. Turn the ignition switch off.

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

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

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

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    J16-1 (BCR+) - J16-2 (BCR-)
    		Always
    		Below 1 Ω

  1. Disconnect the service wire from connector C.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    J16-1 (BCR+) - J16-2 (BCR-)
    		Always
    		1 MΩ or higher
    J16-1 (BCR+) - Body ground
    		Always
    		1 MΩ or higher
    J16-2 (BCR-) - Body ground
    		Always
    		1 MΩ or higher


NG
REPLACE FLOOR WIRE
OK


9.CHECK SIDE AIRBAG SENSOR RH
Yaris. Ncp93, 131.Supplemental Restraint Systems.Airbag System (For Sedan). Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

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

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

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

  1. Clear the DTCs stored in the memory (YARIS_NCP93 RM000000XFE0D2X.html).

  1. Turn the ignition switch off.

  1. Turn the ignition switch to ON, and wait for at least 90 seconds.

  1. Check for DTCs (YARIS_NCP93 RM000000XFE0D2X.html).

    Result
    Result
    		Proceed to
    DTC B1623/81, B1628/82, B1643/81 and B1648/82 are not output
    		A
    DTC B1623/81 or B1643/81 is output
    		B
    DTC B1628/82 or B1648/82 is output
    		C

  1. Turn the ignition switch off.

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

  1. Return the side airbag sensor LH and RH to their original position and connect the connectors to them.



A
USE SIMULATION METHOD TO CHECK

B
REPLACE SIDE AIRBAG SENSOR ASSEMBLY RH
C


10.CHECK REAR AIRBAG SENSOR RH
Yaris. Ncp93, 131.Supplemental Restraint Systems.Airbag System (For Sedan). Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

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

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

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

  1. Clear the DTCs stored in the memory (YARIS_NCP93 RM000000XFE0D2X.html).

  1. Turn the ignition switch off.

  1. Turn the ignition switch to ON, and wait for at least 90 seconds.

  1. Check for DTCs (YARIS_NCP93 RM000000XFE0D2X.html).

    Result
    Result
    		Proceed to
    DTC B1623/81 or B1643/81 is output
    		A
    DTC B1628/82 or B1648/82 is output
    		B
    DTC B1623/81, B1628/82, B1643/81 and B1648/82 are not output
    		C
    HINT:
    Codes other than DTC B1623/81, B1628/82, B1643/81 and B1648/82 may be output at this time, but they are not related to this check.

  1. Turn the ignition switch off.

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

  1. Return the rear airbag sensor RH and LH to their original position and connect the connectors to them.



A
REPLACE REAR AIRBAG SENSOR RH

B
REPLACE CENTER AIRBAG SENSOR ASSEMBLY
C

USE SIMULATION METHOD TO CHECK

11.CHECK CONNECTION OF CONNECTORS

  1. Turn the ignition switch off.

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

  1. Check that the connectors are properly connected to the center airbag sensor assembly and side airbag sensor LH.

    OK:
    The connectors are properly connected.


NG
CONNECT CONNECTORS
OK


12.CHECK CONNECTORS

  1. Disconnect the connectors from the center airbag sensor assembly and side airbag sensor LH.

  1. Check that the connectors (on the center airbag sensor assembly side and side airbag sensor LH side) are not damaged.

    OK:
    The connectors are not deformed or damaged.


NG
REPLACE FLOOR WIRE
OK


13.CHECK FLOOR WIRE (CENTER AIRBAG SENSOR - SIDE AIRBAG SENSOR LH)

Yaris. Ncp93, 131.Supplemental Restraint Systems.Airbag System (For Sedan). Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

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

  1. Turn the ignition switch to ON.

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

    Standard voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    J17-4 (BBL+) - Body ground
    		Ignition switch ON
    		Below 1 V
    J17-3 (BBL-) - Body ground
    		Ignition switch ON
    		Below 1 V

  1. Turn the ignition switch off.

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

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

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

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    J17-4 (BBL+) - J17-3 (BBL-)
    		Always
    		Below 1 Ω

  1. Disconnect the service wire from connector B.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    J17-4 (BBL+) - J17-3 (BBL-)
    		Always
    		1 MΩ or higher
    J17-4 (BBL+) - Body ground
    		Always
    		1 MΩ or higher
    J17-3 (BBL-) - Body ground
    		Always
    		1 MΩ or higher


NG
REPLACE FLOOR WIRE
OK


14.CHECK CONNECTION OF CONNECTOR

  1. Check that the connector is properly connected to the rear airbag sensor LH.

    OK:
    The connector is properly connected.


NG
CONNECT CONNECTORS
OK


15.CHECK CONNECTORS

  1. Disconnect the connectors from the side airbag sensor LH and rear airbag sensor LH.

  1. Check that the connector (on the rear airbag sensor LH side) is not damaged.

    OK:
    The connector is not deformed or damaged.


NG
REPLACE FLOOR WIRE
OK


16.CHECK FLOOR WIRE (SIDE AIRBAG SENSOR LH - REAR AIRBAG SENSOR LH)

Yaris. Ncp93, 131.Supplemental Restraint Systems.Airbag System (For Sedan). Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

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

  1. Turn the ignition switch to ON.

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

    Standard voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    J17-1 (BCL+) - Body ground
    		Ignition switch ON
    		Below 1 V
    J17-2 (BCL-) - Body ground
    		Ignition switch ON
    		Below 1 V

  1. Turn the ignition switch off.

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

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

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

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    J17-1 (BCL+) - J17-2 (BCL-)
    		Always
    		Below 1 Ω

  1. Disconnect the service wire from connector C.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    J17-1 (BCL+) - J17-2 (BCL-)
    		Always
    		1 MΩ or higher
    J17-1 (BCL+) - Body ground
    		Always
    		1 MΩ or higher
    J17-2 (BCL-) - Body ground
    		Always
    		1 MΩ or higher


NG
REPLACE FLOOR WIRE
OK


17.CHECK SIDE AIRBAG SENSOR LH
Yaris. Ncp93, 131.Supplemental Restraint Systems.Airbag System (For Sedan). Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

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

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

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

  1. Clear the DTCs stored in the memory (YARIS_NCP93 RM000000XFE0D2X.html).

  1. Turn the ignition switch off.

  1. Turn the ignition switch to ON, and wait for at least 90 seconds.

  1. Check for DTCs (YARIS_NCP93 RM000000XFE0D2X.html).

    Result
    Result
    		Proceed to
    DTC B1628/82 or B1648/82 is output
    		A
    DTC B1623/81, B1628/82, B1643/81 and B1648/82 are not output
    		B
    DTC B1623/81 or B1643/81 is output
    		C

  1. Turn the ignition switch off.

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

  1. Return the side airbag sensor RH and LH to their original position and connect the connectors to them.



A
REPLACE SIDE AIRBAG SENSOR ASSEMBLY LH

B
USE SIMULATION METHOD TO CHECK
C


18.CHECK REAR AIRBAG SENSOR LH
Yaris. Ncp93, 131.Supplemental Restraint Systems.Airbag System (For Sedan). Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

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

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

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

  1. Clear the DTCs stored in the memory (YARIS_NCP93 RM000000XFE0D2X.html).

  1. Turn the ignition switch off.

  1. Turn the ignition switch to ON, and wait for at least 90 seconds.

  1. Check for DTCs (YARIS_NCP93 RM000000XFE0D2X.html).

    Result
    Result
    		Proceed to
    DTC B1623/81 or B1643/81 is output
    		A
    DTC B1628/82 or B1648/82 is output
    		B
    DTC B1623/81, B1628/82, B1643/81 and B1648/82 are not output
    		C
    HINT:
    Codes other than DTC B1623/81, B1628/82, B1643/81 and B1648/82 may be output at this time, but they are not related to this check.

  1. Turn the ignition switch off.

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

  1. Return the rear airbag sensor RH and LH to their original position and connect the connectors to them.



A
REPLACE CENTER AIRBAG SENSOR ASSEMBLY

B
REPLACE REAR AIRBAG SENSOR LH
C

USE SIMULATION METHOD TO CHECK