Dtc B1625/22 Front Passenger Side - Side Airbag Sensor Circuit Malfunction


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CONNECTION OF CONNECTORS

CHECK CONNECTORS

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

CHECK SIDE AIRBAG SENSOR LH

CHECK CONNECT

CHECK CONNECTORS

CHECK REAR AIRBAG SENSOR LH CIRCUIT

CHECK FOR DTC

CHECK SIDE AIRBAG SENSOR LH

DTC B1625/22 Front Passenger Side - Side Airbag Sensor Circuit Malfunction


DESCRIPTION

The side airbag sensor LH consists of the safing sensor, the diagnostic circuit, the lateral deceleration sensor, etc.
If the center airbag sensor receives signals from the lateral deceleration sensor, it determines whether the SRS should be activated.
DTC B1625/22 is recorded when a malfunction is detected in the side airbag sensor LH circuit.

DTC Code
Detection Condition
Trouble Area
B1625/22
When both conditions below are met:
  1. Side airbag sensor LH malfunction
  2. Center airbag sensor malfunction
  1. Side airbag sensor LH
  2. Rear airbag sensor LH
  3. Floor wire
  4. Center airbag sensor assembly

WIRING DIAGRAM


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Supplemental Restraint System.Airbag System. Dtc B1625/22 Front Passenger Side - Side Airbag Sensor Circuit Malfunction


INSPECTION PROCEDURE

1.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 and side airbag sensor LH.

    OK:
    The connectors are properly connected.


NG
CONNECT CONNECTORS PROPERLY
OK


2.CHECK CONNECTORS

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

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

    OK:
    The connectors are not deformed or damaged.


NG
REPLACE FLOOR WIRE
OK


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

Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Supplemental Restraint System.Airbag System. Dtc B1625/22 Front Passenger Side - Side Airbag Sensor Circuit Malfunction

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

  1. Turn the ignition switch ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    F31-3 (BBL-) - Body ground
    		Ignition switch ON
    		Below 1 V
    F31-4 (BBL+) - Body ground

  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
    F31-3 (BBL-) - F31-4 (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
    F31-3 (BBL-) - F31-4 (BBL+)
    		Always
    		1 MΩ or higher
    F31-3 (BBL-) - Body ground
    F31-4 (BBL+) - Body ground


NG
REPLACE FLOOR WIRE
OK


4.CHECK SIDE AIRBAG SENSOR LH
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Supplemental Restraint System.Airbag System. Dtc B1625/22 Front Passenger Side - Side Airbag Sensor Circuit Malfunction

  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 ON, and wait for at least 60 seconds.

  1. Clear the DTCs stored in the memory (Toyota Fortuner RM000000YVY008X.html).

  1. Turn the ignition switch OFF.

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

  1. Check for DTCs (Toyota Fortuner RM000000YVY008X.html).

    Result
    Result
    		Proceed to
    DTC B1620 and B1625 are not output
    		A
    DTC B1620 is output
    		B
    DTC B1625 is output
    		C
    HINT:
    Codes other than DTC B1620 and B1625 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 side airbag sensor RH and LH to their original positions and connect the connectors to them.



A
USE SIMULATION METHOD TO CHECK

B
REPLACE SIDE AIRBAG SENSOR LH
C


5.CHECK CONNECT

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

    OK:
    The connector is properly connected.


NG
CONNECT CONNECTORS PROPERLY
OK


6.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


7.CHECK REAR AIRBAG SENSOR LH CIRCUIT

Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Supplemental Restraint System.Airbag System. Dtc B1625/22 Front Passenger Side - Side Airbag Sensor Circuit Malfunction

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

  1. Turn the ignition switch ON.

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

    Standard Voltage:
    Tester Connection
    		Switch Condition
    		Specified Condition
    R17-4 (BCL+) - Body ground
    		Ignition Switch ON
    		Below 1 V
    R17-3 (BCL-) - Body ground

  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 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
    R17-4 (BCL+) - R17-3 (BCL-)
    		Always
    		Below 1 Ω

  1. Disconnect the service wire from the connector B.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    R17-4 (BCL+) - R17-3 (BCL-)
    		Always
    		1 MΩ or higher
    R17-4 (BCL+) - Body ground
    R17-3 (BCL-) - Body ground


NG
REPLACE FLOOR WIRE
OK


8.CHECK FOR DTC


    Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Supplemental Restraint System.Airbag System. Dtc B1625/22 Front Passenger Side - Side Airbag Sensor Circuit Malfunction

  1. Connect the connectors to the side airbag sensor LH.

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

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

  1. Clear the DTCs stored in the memory (Toyota Fortuner RM000000YVY008X.html).

  1. Turn the ignition switch OFF.

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

  1. Check for DTCs (Toyota Fortuner RM000000YVY008X.html).

    OK:
    DTC B1625 is output.
HINT:
Codes other than B1625 may be output at this time, but they are not related to this check.


NG
REPLACE REAR AIRBAG SENSOR LH
OK


9.CHECK SIDE AIRBAG SENSOR LH
Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Supplemental Restraint System.Airbag System. Dtc B1625/22 Front Passenger Side - Side Airbag Sensor Circuit Malfunction

  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 ON, and wait for at least 60 seconds.

  1. Clear the DTCs stored in the memory (Toyota Fortuner RM000000YVY008X.html).

  1. Turn the ignition switch OFF.

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

  1. Check for DTCs (Toyota Fortuner RM000000YVY008X.html).

    Result
    Result
    		Proceed to
    DTC B1620 and B1625 are not output
    		A
    DTC B1625 is output
    		B
    DTC B1620 is output
    		C
    HINT:
    Codes other than DTC B1620 and B1625 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 side airbag sensor RH and LH to their original positions and connect the connectors to them.



A
USE SIMULATION METHOD TO CHECK

B
REPLACE CENTER AIRBAG SENSOR ASSEMBLY
C

REPLACE SIDE AIRBAG SENSOR LH