Side Airbag Sensor LH Circuit Malfunction - Airbag System

SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1625/22, B1627/82: Side Airbag Sensor LH Circuit Malfunction
B1627/82 - Lost communication with Side Airbag Sensor LH

DESCRIPTION

for DTC B1625/22:

The side airbag sensor LH (for rear side) 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 the SRS should be activated.

DTC B1625/22 is recorded when a malfunction is detected in the side airbag sensor LH (for rear side) circuit.

for DTC B1627/82:

The circuit for the side collision sensor LH (to determine deployment of the curtain shield airbag LH is composed of the center airbag sensor assembly, side airbag sensor LH (for front side) and side airbag sensor LH (for rear side).

The side airbag sensor LH (for front side) and side airbag sensor LH (for rear side) detect impacts to the vehicle and send signals to the center airbag sensor assembly to determine if the airbag should be deployed.

DTC B1627/82 is recorded when a malfunction is detected in the circuit for the side collision sensor LH (for rear side) to determine deployment of the curtain shield airbag LH.





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 LH (for rear side) with side airbag sensor RH (for rear side) and connect the connectors to them.

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

(e) Turn the ignition switch to ON, and wait for at least 60 seconds.

(f) Clear the DTCs stored in the memory Reading and Clearing Diagnostic Trouble Codes.

(g) Turn the ignition switch off.

(h) Turn the ignition switch to ON, and wait for at least 60 seconds.

(i) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.

Result





Text in Illustration





HINT
DTCs other than B1620/21, B1622/81, B1625/22 and B1627/82 may be output at this time, but they are not related to this check.

(j) Turn the ignition switch off.

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

(l) Return the side airbag sensor RH (for rear side) and side airbag sensor LH (for rear side) to their original positions and connect the connectors to them.

A -- USE SIMULATION METHOD TO CHECK Diagnosis System

B -- REPLACE SIDE AIRBAG SENSOR LH (FOR REAR SIDE) Removal

C -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal