Dtc B1643/81 Driver Side Satellite Sensor Bus 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 FOR DTC

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 B1643/81 Driver Side Satellite Sensor Bus Initialization Incomplete


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 B1643/81 is set when a malfunction is detected in the driver side - side airbag sensor circuit.

DTC Code
DTC Detection Condition
Trouble Area
B1643/81
When one of following conditions is met:
  1. Center airbag sensor detects open circuit signal in driver side - side airbag sensor circuit for 2 seconds.
  2. Driver side - side airbag sensor malfunction
  3. Driver side rear airbag sensor malfunction
  4. 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. Rear airbag sensor LH (Driver side rear airbag sensor) (for LHD)
    Rear airbag sensor RH (Driver side rear airbag sensor) (for RHD)
  4. Center airbag sensor

WIRING DIAGRAM


Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1643/81 Driver Side Satellite Sensor Bus Initialization Incomplete


INSPECTION PROCEDURE

1.CHECK FOR DTC
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1643/81 Driver Side Satellite Sensor Bus Initialization Incomplete

  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).

    OK:
    DTC B1622/81 is not output.
    DTC B1632/81 is not output.
    HINT:
    DTCs other than DTC B1622/81 or B1632/81 may be output at this time, but they are not related to this check.


NG
GO TO DTC OUTPUT
OK


2.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


3.CHECK FLOOR WIRE (OPEN)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1643/81 Driver Side Satellite Sensor Bus 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 K30-4 (BBL+) and K30-3 (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 L21-4 (BBR+) and L21-3 (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


4.CHECK FLOOR WIRE (SHORT)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1643/81 Driver Side Satellite Sensor Bus 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


5.CHECK FLOOR WIRE (TO B+)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1643/81 Driver Side Satellite Sensor Bus 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


6.CHECK FLOOR WIRE (TO GROUND)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1643/81 Driver Side Satellite Sensor Bus 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


7.CHECK FLOOR WIRE (OPEN)

Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1643/81 Driver Side Satellite Sensor Bus 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 K31-1 (BCL-) and K31-2 (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 L22-1 (BCR-) and L22-2 (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
    K30-1 (BCL+) - K30-2 (BCL-)
    		Below 1 Ω
    for RHD:
    Tester Connection
    		Specified Condition
    L21-1 (BCR+) - L21-2 (BCR-)
    		Below 1 Ω


NG
REPAIR OR REPLACE FLOOR WIRE
OK


8.CHECK FLOOR WIRE (SHORT)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1643/81 Driver Side Satellite Sensor Bus 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
    K30-1 (BCL+) - K30-2 (BCL-)
    		1 MΩ or higher
    for RHD:
    Tester Connection
    		Specified Condition
    L21-1 (BCR+) - L21-2 (BCR-)
    		1 MΩ or higher


NG
REPAIR OR REPLACE FLOOR WIRE
OK


9.CHECK FLOOR WIRE (TO B+)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1643/81 Driver Side Satellite Sensor Bus 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
    K30-1 (BCL+) - Body ground
    		Below 1 V
    K30-2 (BCL-) - Body ground
    		Below 1 V
    for RHD:
    Tester Connection
    		Specified Condition
    L21-1 (BCR+) - Body ground
    		Below 1 V
    L21-2 (BCR-) - Body ground
    		Below 1 V


NG
REPAIR OR REPLACE FLOOR WIRE
OK


10.CHECK FLOOR WIRE (TO GROUND)
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1643/81 Driver Side Satellite Sensor Bus 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
    K30-1 (BCL+) - Body ground
    		1 MΩ or higher
    K30-2 (BCL-) - Body ground
    		1 MΩ or higher
    for RHD:
    Tester Connection
    		Specified Condition
    L21-1 (BCR+) - Body ground
    		1 MΩ or higher
    L21-1 (BCR-) - Body ground
    		1 MΩ or higher


NG
REPAIR OR REPLACE FLOOR WIRE
OK


11.CHECK DRIVER SIDE - SIDE AIRBAG SENSOR
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1643/81 Driver Side Satellite Sensor Bus 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 for DTCs (RAV4_ACA30 RM000000XFE06SX.html).

    Result
    Result
    		Proceed to
    DTC B1643/81 and B1648/82 are not output
    		A
    DTC B1643/81 is output
    		B
    DTC B1648/82 is output
    		C
    HINT:
    DTCs other than DTC B1643/81 and B1648/82 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


12.CHECK DRIVER SIDE REAR AIRBAG SENSOR
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1643/81 Driver Side Satellite Sensor Bus 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 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 B1643/81 and B1648/82 are not output
    		A
    DTC B1643/81 is output
    		B
    DTC B1648/82 is output
    		C
    HINT:
    DTCs other than DTC B1643/81 and B1648/82 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