Before replacing the SRS unit, check the SRS unit software version with the HDS. If the software version is not the latest,
update the SRS unit software
and retest.
Faulty front passenger's airbag on/off switch or poor connection at front passenger's airbag on/off switch 4P connector and the front passenger's airbag on/off switch. Check the connection between the connector and the front passenger's airbag on/off switch. If the connection is OK,
replace the front passenger's airbag on/off switch.
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