1. Check resistance between the No. 3 and the No. 4 terminal of SRS unit connector B (28P). There should be 2.0−3.0 Ω.

Is resistance as specified?

YES | - | Faulty SRS unit or poor contact at SRS unit connector B (28P) and the SRS unit. Check the connection; If the connection is OK, replace the SRS unit.■
NO | - | Open or increased resistance in the floor wire harness; replace the floor wire harness.■