Dtc B1622/81 Lost Communication With Driver Side - Side Airbag Sensor Assembly

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 SIDE AIRBAG SENSOR

DTC B1622/81 Lost Communication with Driver Side - Side Airbag Sensor Assembly


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 B1622/81 is set when a malfunction is detected in the driver side - side airbag sensor circuit.

DTC No.
DTC Detection Condition
Trouble Area
B1622/81
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 B1622/81 Lost Communication With Driver Side - Side Airbag Sensor Assembly


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 B1622/81 Lost Communication With Driver Side - Side Airbag Sensor Assembly

  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 B1622/81 Lost Communication With Driver Side - Side Airbag Sensor Assembly

  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 B1622/81 Lost Communication With Driver Side - Side Airbag Sensor Assembly

  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 B1622/81 Lost Communication With Driver Side - Side Airbag Sensor Assembly

  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 SIDE AIRBAG SENSOR
Toyota Rav4. Aca30, 33, 38 Gsa33 Zsa30, 35.Supplemental Restraint System.Airbag System. Dtc B1622/81 Lost Communication With Driver Side - Side Airbag Sensor Assembly

  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 B1622/81 and B1627/82 are not
    		A
    DTC B1627/82 is output.
    		B
    DTC B1622/81 is output.
    		C
    HINT:
    DTCs other than DTC B1622/81 and B1627/82 may be output at this time, but they are not related to this check.


B
REPLACE SIDE AIRBAG SENSOR

C
REPLACE CENTER AIRBAG SENSOR ASSEMBLY
A

USE SIMULATION METHOD TO CHECK