B1625

SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1625, B16F5; Side Airbag Sensor LH Circuit Malfunction; 2013 MY FR-S [03/2012 -]
B1625 - Side Airbag Sensor LH Circuit Malfunction
B16F5 - Side Airbag Sensor LH Mismatch

DESCRIPTION

The side collision sensor LH circuit (to determine deployment of the front seat airbag assembly LH, curtain shield airbag assembly LH and front seat outer belt assembly LH) is composed of the airbag ECU assembly, side airbag sensor assembly LH, side No. 2 airbag sensor assembly LH and rear airbag sensor LH and No. 2 airbag sensor assembly.

The side No. 2 airbag sensor assembly LH detects impacts to the vehicle and sends signals to the airbag ECU assembly to determine if the airbag should be deployed.

These DTCs are stored when a malfunction is detected in the side No. 2 airbag sensor assembly LH.





WIRING DIAGRAM

Refer to DTCs B1627, B1628, B1637, B1638, B1647, B1697 and B1698 B1627.

INSPECTION PROCEDURE

NOTICE:
After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work Service Precautions.

PROCEDURE

1. CHECK SIDE NO. 2 AIRBAG SENSOR ASSEMBLY LH

(a) Turn the ignition switch off.









(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Interchange the side No. 2 airbag sensor assembly LH with RH and connect the connectors.

(d) Connect the cable to the negative (-) battery terminal.

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

(f) Turn the ignition switch off.

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

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

Result:





HINT
Codes other than DTCs B1620 and B1625 may be output at this time, but they are not related to this check.

(i) Turn the ignition switch off.

(j) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(k) Return the side No. 2 airbag sensor assembly LH and RH to their original positions and connect the connectors.

B -- REPLACE SIDE NO. 2 AIRBAG SENSOR ASSEMBLY LH Removal

C -- USE SIMULATION METHOD TO CHECK

A -- REPLACE AIRBAG ECU ASSEMBLY Removal