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

Restraints. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35
Supplemental Restraint System. Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CONNECTION OF CONNECTOR

CHECK FLOOR WIRE (OPEN)

CHECK FLOOR WIRE (SHORT)

CHECK FLOOR WIRE (TO B+)

CHECK FLOOR WIRE (TO GROUND)

CHECK FLOOR WIRE (OPEN)

CHECK FLOOR WIRE (SHORT)

CHECK FLOOR WIRE (TO B+)

CHECK FLOOR WIRE (TO GROUND)

CHECK DRIVER SIDE - SIDE AIRBAG SENSOR

CHECK DRIVER SIDE REAR AIRBAG SENSOR

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

DTC B1632/81 Lost Communication with Driver Side Rear Airbag Sensor

DTC B1633/81 Driver Side Rear Airbag Sensor Initialization Incomplete

DTC B1642/81 Lost Communication with Driver Side Satellite Sensor Bus


DESCRIPTION

The driver side - side airbag sensor consists of parts including the diagnostic circuit and the lateral deceleration sensor.
When the center airbag sensor receives signals from the lateral deceleration sensor, it determines whether or not the SRS should be activated.
DTC B1623/81, B1632/81, B1633/81 or B1642/81 is set when a malfunction is detected in the driver side - side airbag sensor circuit.

DTC Code
DTC Detection Condition
Trouble Area
B1623/81
B1632/81
B1633/81
B1642/81
When one of following conditions is met:
  1. Center airbag sensor detects line short signal, open signal, short to ground signal or short to B+ signal in driver side - side airbag sensor circuit for 2 seconds.
  2. Driver side - side airbag sensor malfunction
  3. Center airbag sensor malfunction
  1. Floor wire
  2. Side airbag sensor LH (Driver side-side airbag sensor) (for LHD)
    Side airbag sensor RH (Driver side-side airbag sensor) (for RHD)
  3. Center airbag sensor

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete


INSPECTION PROCEDURE

1.CHECK CONNECTION OF CONNECTOR

  1. Turn the ignition switch off.

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

  1. Check that the connectors are properly connected to the center airbag sensor, driver side rear airbag sensor and the driver side - side airbag sensor.

    OK:
    The connectors are properly connected.


NG
CONNECT CONNECTOR
OK


2.CHECK FLOOR WIRE (OPEN)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

  1. Disconnect the connectors from the center airbag sensor and the driver side - side airbag sensor.

  1. for LHD:
    Using a service wire, connect K10-4 (BBL+) and K10-3 (BBL-) of connector C.

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

  1. for RHD:
    Using a service wire, connect L6-4 (BBR+) and L6-3 (BBR-) of connector C.

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

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    for LHD:
    Tester Connection
    		Specified Condition
    K1-8 (BBD+) - K1-15 (BBD-)
    		Below 1 Ω
    for RHD:
    Tester Connection
    		Specified Condition
    L18-8 (BBD+) - L18-15 (BBD-)
    		Below 1 Ω


NG
REPAIR OR REPLACE FLOOR WIRE
OK


3.CHECK FLOOR WIRE (SHORT)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

  1. Disconnect the service wire from connector C.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    for LHD:
    Tester Connection
    		Specified Condition
    K1-8 (BBD+) - K1-15 (BBD-)
    		1 MΩ or higher
    for RHD:
    Tester Connection
    		Specified Condition
    L18-8 (BBD+) - L18-15 (BBD-)
    		1 MΩ or higher


NG
REPAIR OR REPLACE FLOOR WIRE
OK


4.CHECK FLOOR WIRE (TO B+)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

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

  1. Turn the ignition switch on (IG).

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    for LHD:
    Tester Connection
    		Specified Condition
    K1-8 (BBD+) - Body ground
    		Below 1 V
    K1-15 (BBD-) - Body ground
    		Below 1 V
    for RHD:
    Tester Connection
    		Specified Condition
    L18-8 (BBD+) - Body ground
    		Below 1 V
    L18-15 (BBD-) - Body ground
    		Below 1 V


NG
REPAIR OR REPLACE FLOOR WIRE
OK


5.CHECK FLOOR WIRE (TO GROUND)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

  1. Turn the ignition switch off.

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

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    for LHD:
    Tester Connection
    		Specified Condition
    K1-8 (BBD+) - Body ground
    		1 MΩ or higher
    K1-15 (BBD-) - Body ground
    		1 MΩ or higher
    for RHD:
    Tester Connection
    		Specified Condition
    L18-8 (BBD+) - Body ground
    		1 MΩ or higher
    L18-15 (BBD-) - Body ground
    		1 MΩ or higher


NG
REPAIR OR REPLACE FLOOR WIRE
OK


6.CHECK FLOOR WIRE (OPEN)

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

  1. Disconnect the connectors from the driver side - side airbag sensor and the driver side rear airbag sensor.

  1. for LHD:
    Using a service wire, connect K26-1 (BCL-) and K26-2 (BCL+) of connector C.

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

  1. for RHD:
    Using a service wire, connect L20-1 (BCR-) and L20-2 (BCR+) of connector C.

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

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    for LHD:
    Tester Connection
    		Specified Condition
    K10-1 (BCL+) - K10-2 (BCL-)
    		Below 1 Ω
    for RHD:
    Tester Connection
    		Specified Condition
    L6-1 (BCR+) - L6-2 (BCR-)
    		Below 1 Ω


NG
REPAIR OR REPLACE FLOOR WIRE
OK


7.CHECK FLOOR WIRE (SHORT)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

  1. Disconnect the service wire from connector C.

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    for LHD:
    Tester Connection
    		Specified Condition
    K10-1 (BCL+) - K10-2 (BCL-)
    		1 MΩ or higher
    for RHD:
    Tester Connection
    		Specified Condition
    L6-1 (BCR+) - L6-2 (BCR-)
    		1 MΩ or higher


NG
REPAIR OR REPLACE FLOOR WIRE
OK


8.CHECK FLOOR WIRE (TO B+)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

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

  1. Turn the ignition switch on (IG).

  1. Measure the voltage of the wire harness side connector.

    Standard voltage:
    for LHD:
    Tester Connection
    		Specified Condition
    K10-1 (BCL+) - Body ground
    		Below 1 V
    K10-2 (BCL-) - Body ground
    		Below 1 V
    for RHD:
    Tester Connection
    		Specified Condition
    L6-1 (BCR+) - Body ground
    		Below 1 V
    L6-2 (BCR-) - Body ground
    		Below 1 V


NG
REPAIR OR REPLACE FLOOR WIRE
OK


9.CHECK FLOOR WIRE (TO GROUND)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

  1. Turn the ignition switch off.

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

  1. Measure the resistance of the wire harness side connector.

    Standard resistance:
    for LHD:
    Tester Connection
    		Specified Condition
    K10-1 (BCL+) - Body ground
    		1 MΩ or higher
    K10-2 (BCL-) - Body ground
    		1 MΩ or higher
    for RHD:
    Tester Connection
    		Specified Condition
    L6-1 (BCR+) - Body ground
    		1 MΩ or higher
    L6-1 (BCR-) - Body ground
    		1 MΩ or higher


NG
REPAIR OR REPLACE FLOOR WIRE
OK


10.CHECK DRIVER SIDE - SIDE AIRBAG SENSOR
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

  1. Connect the connectors to the center airbag sensor.

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

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

  1. Turn the ignition switch on (IG), and wait for at least 60 seconds.

  1. Clear the DTCs (RAV4_ACA30 RM000000XFE06SX.html).

  1. Turn the ignition switch off.

  1. Turn the ignition switch on (IG), and wait for at least 60 seconds.

  1. Check the DTCs (RAV4_ACA30 RM000000XFE06SX.html).

    Result
    Result
    		Proceed to
    DTC B1623/81, B1632/81, B1633/81, B1642/81, B1628/82, B1637/82, B1638/82 and B1647/82 is not output
    		A
    DTC B1623/81, B1632/81, B1633/81 and B1642/81 are output
    		B
    DTC B1628/82, B1637/82, B1638/82 and B1647/82 are output
    		C
    HINT:
    DTCs other than DTC B1623/81, B1632/81, B1633/81, B1642/81, B1628/82, B1637/82, B1638/82 and B1647/82 may be output at this time, but they are not related to this check.


B
REPLACE CENTER AIRBAG SENSOR ASSEMBLY

C
REPLACE DRIVER SIDE - SIDE AIRBAG SENSOR
A


11.CHECK DRIVER SIDE REAR AIRBAG SENSOR
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete

  1. Turn the ignition switch off.

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

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

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

  1. Turn the ignition switch on (IG), and wait for at least 60 seconds.

  1. Clear the DTCs (RAV4_ACA30 RM000000KT106QX.html).

  1. Turn the ignition switch off.

  1. Turn the ignition switch on (IG), and wait for at least 60 seconds.

  1. Check the DTCs (RAV4_ACA30 RM000000XFE06SX.html).

    Result
    Result
    		Proceed to
    DTC B1623/81, B1632/81, B1633/81, B1642/81, B1628/82, B1637/82, B1638/82 and B1647/82 is not output
    		A
    DTC B1623/81, B1632/81, B1633/81 and B1642/81 are output
    		B
    DTC B1628/82, B1637/82, B1638/82 and B1647/82 are output
    		C
HINT:
DTCs other than DTC B1623/81, B1632/81, B1633/81, B1642/81, B1628/82, B1637/82, B1638/82 and B1647/82 may be output at this time, but they are not related to this check.


B
REPLACE CENTER AIRBAG SENSOR ASSEMBLY

C
REPLACE DRIVER SIDE REAR AIRBAG SENSOR
A

USE SIMULATION METHOD TO CHECK