Troubleshoot DTC A1-1x before doing this troubleshooting procedure.
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.
Measure the resistance between the No. 20 terminal of SRS unit connector A (39P) and the No. 1 terminal of the passenger's airbag off indicator 4P connector. There should be 0−1.0 Ω