Measure the resistance between the No. 4 terminal of the SRS floor wire harness 4P connector and the No. 1 terminal of the SRS floor wire harness 2P connector, and between the No. 1 terminal of the SRS floor wire harness 4P connector and the No. 2 terminal of the SRS floor wire harness 2P connector. There should be 0−1.0 Ω.