2007 Mazda 3 - Airbag Light Flashing Code 19 / DTC B1935 Resistance Low

Question

My 2007 Mazda 3 has an SRS light blinking a pattern of 1 and then 9 on the dash. Hooked up my scanner and pulled code B1935 for Passenger Airbag Resistance Low on Stage 1. The light stays on solid after the initial blinking sequence finished.

fleet_chief_42 · Accepted Answer

I found the issue was the passenger side airbag inflator connector. I disconnected the battery for 30 minutes, removed the glovebox, and found that the shorting bar inside the yellow Stage 1 connector was partially bent and touching the pins. I straightened the shorting bar pins with a pick tool and reseated the connector firmly until it clicked. Resistance returned to 2.4 ohms on the live data stream, and the code cleared immediately. Total cost was $0 and about an hour of labor.

Tom Patel · Answer

Check the passenger side impact sensors located near the door sill as well. Sometimes corrosion in the floor harness connector (X-22) under the kick panel can cause cross-talk between the CAN lines and the SRS loop, throwing low resistance codes.

turbo_tony · Answer

You should check the clockspring if the code was for the driver side, but for the passenger side, it is almost always the squib connector at the airbag itself. Use a multimeter to check the resistance but do NOT do this with the airbag plugged in or you might trigger it; use a 2.2-ohm resistor to bypass the bag and see if the code clears.

Brian O'Connor · Answer

Since it is a 'low resistance' code, you are likely looking for a short circuit rather than a loose connection. Carefully inspect the wiring harness pinned between the glove box frame and the dash reinforcement beam, as they are known to chafe there.

2007 Mazda 3 - Airbag Light Flashing Code 19 / DTC B1935 Resistance Low

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