1. Check resistance between the No. 9 and No. 10 terminals of SRS unit connector C (16P). There should be 1.0 Ω or less.

Is the resistance as specified?

YES | - | Faulty left side impact sensor (second) or SRS unit; replace the left side impact sensor (second). If the problem is still present, replace the SRS unit. ■
NO | - | Open or increased resistance in the side curtain airbag subharness; replace the side curtain airbag subharness.■