Lexus IS250 IS220d GSE20 ALE20 - SUPPLEMENTAL RESTRAINT SYSTEM

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK DTC

CHECK CONNECTION OF CONNECTORS

CHECK FLOOR WIRE

CHECK FRONT PASSENGER SIDE - SIDE AIRBAG SENSOR

CHECK FRONT PASSENGER SIDE REAR AIRBAG SENSOR

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

DESCRIPTION

The front passenger side - side airbag sensor circuit consists of the safing sensor, the diagnostic circuit, the lateral deceleration sensor, etc.


If the center airbag sensor assembly receives signals from the lateral deceleration sensor, it determines whether or not the SRS should be activated.


DTC B1625/22 is recorded when a malfunction is detected in the front passenger side - side airbag sensor circuit.

DTC No.DTC Detection ConditionTrouble Area
B1625/22
The center airbag sensor assembly receives an open circuit signal in the front passenger side - side airbag sensor circuit for 2 seconds.
Front passenger side rear airbag sensor malfunction
Front passenger side - side airbag sensor malfunction
Center airbag sensor assembly malfunction
Floor wire
Front passenger side rear airbag sensor
Front passenger side - side airbag sensor
Center airbag sensor assembly
  • HINT:
  • Troubleshoot DTC B1625/22 first when DTC B1625/22 and B1635/24 are output simultaneously.

WIRING DIAGRAM

Dtc B1625/22 Front Passenger Side - Side Airbag Sensor Circuit Malfunction. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

INSPECTION PROCEDURE

1.CHECK DTC
Dtc B1625/22 Front Passenger Side - Side Airbag Sensor Circuit Malfunction. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

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

Clear the DTCs stored in the memory .

Turn the engine switch off.

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

Check for DTCs .

  • OK:
  • DTC B1625/22 is not output.
  • HINT:
  • Codes other than DTC B1625/22 may be output at this time, but they are not related to this check.
NG
Go to step 2
OK
USE SIMULATION METHOD TO CHECK
2.CHECK CONNECTION OF CONNECTORS

Turn the engine switch off.

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

Check that the connectors are properly connected to the front passenger side - side airbag sensor and the front passenger side rear airbag sensor .

  • OK:
  • The connectors are properly connected.
NG
Go to step 5
B
REPLACE FRONT PASSENGER SIDE - SIDE AIRBAG SENSOR
C
USE SIMULATION METHOD TO CHECK
5.CHECK FRONT PASSENGER SIDE REAR AIRBAG SENSOR
Dtc B1625/22 Front Passenger Side - Side Airbag Sensor Circuit Malfunction. SUPPLEMENTAL RESTRAINT SYSTEM. Lexus IS250 IS220d GSE20 ALE20

Turn the engine switch off.

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

Return the driver side - side airbag sensor and front passenger side - side airbag sensor to their original positions and connect the connectors to them.

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

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

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

Clear the DTCs stored in the memory .

Turn the engine switch off.

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

Check for DTCs .

  • Result:
  • ResultProceed to
    DTC B1625/22 is output.A
    DTC B1620/21 is output.B
    DTC B1620/21 and B1625/22 are not output.C
  • HINT:
  • Codes other than DTC B1620/21 and B1625/22 may be output at this time, but they are not related to this check.
A
REPLACE CENTER AIRBAG SENSOR ASSEMBLY
B
REPLACE FRONT PASSENGER SIDE REAR AIR BAG SENSOR
C
USE SIMULATION METHOD TO CHECK
LEXUS IS250, IS220d / GSE20 ALE20
SUPPLEMENTAL RESTRAINT SYSTEM
Lexus IS250 IS220d GSE20 ALE20
AIRBAG SYSTEM