B1620

SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1620/21: Driver Side - Side Airbag Sensor Malfunction

DTC B1620/21 - Driver Side - Side Airbag Sensor Malfunction

DESCRIPTION

The driver side - side collision sensor circuit (to determine deployment of the front seat side airbag assembly LH and curtain shield airbag assembly LH) is composed of the center airbag sensor assembly, side airbag sensor LH (for rear side), rear airbag sensor LH and side airbag sensor LH (for front side).
The side airbag sensor LH (for rear side), rear airbag sensor LH and side airbag sensor LH (for front side) detect impacts to the vehicle and send signals to the center airbag sensor assembly to determine if the airbag should be deployed.
DTC B1620/21 is recorded when a malfunction is detected in the side airbag sensor LH (for rear side).





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK SIDE AIRBAG SENSOR LH (FOR REAR SIDE)




(a) Turn the ignition switch off.
(b) Disconnect the cable from the negative (-) battery terminal, and wait for at least 90 seconds.
(c) Interchange the side airbag sensor RH (for rear side) with side airbag sensor LH (for rear side) and connect the connectors.
(d) Connect the cable to the negative (-) battery terminal.
(e) Turn the ignition switch to ON, and wait for at least 60 seconds.
(f) Clear the DTCs stored in the memory DTC Check / Clear.
(g) Turn the ignition switch off.
(h) Turn the ignition switch to ON, and wait for at least 60 seconds.
(i) Check for DTCs DTC Check / Clear.
Result:





Text in Illustration





HINT: Codes other than DTC B1620/21 and B1625/22 may be output at this time, but they are not related to this check.

C -- USE SIMULATION METHOD TO CHECK
B -- REPLACE SIDE AIRBAG SENSOR LH (FOR REAR SIDE)
A -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY