How are impact sensors connected to the airbag control module?
The sensors communicate with the SDM (the main airbag control module) via a DATABUS. Its computer talk….NOT a “just complete the circuit” thing.
Can you accidentally set off an airbag sensor?
As long as you dont take the two wires going to the inflator modules (ie, the bags themselves) and apply +12v directly to them, you really cant accidentally “set off” the airbags even if you tried… I know everyone thinks an airbag sensor is “a switch”…which couldnt be further from the truth.
How does the inflatable restraint sensing and diagnostic module work?
The Inflatable Restraint Sensing and Diagnostic Module (SDM) maintains a reserved energy supply. The reserved energy supply provides deployment power for the air bags if the Inflatable Restraint Sensing and Diagnostic Module loses battery power during a collision.
How does the air bag warning system work?
To ensure there is no unwanted SIR deployment, personal injury, or unnecessary SIR system repairs, remove all fuses supplying power to the SDM. With all SDM fuses removed and the ignition switch in the ON position, the AIR BAG warning indicator illuminates.
What to do if your airbag sensor says there is a problem?
If the airbag sensor’s wirings and connector are fine and the airbag control module says there is a problem with the airbag sensor, replace it! They often not super expensive, and you do not want to mess around with these parts because you really want it to work if the accident occurs!
What happens if you replace the air bag wiring harness?
Per the Mazda service information: “Incorrectly repairing an air bag wiring harness can accidentally operate (deploy) the air bag module and pre-tensioner front buckles. If a problem is found in the air bag wiring harness, always replace the wiring harness with a new one.”
Where is the negative terminal on the airbag sensor?
Open the hood of your car and locate the battery. On the battery, you will see a positive and a negative terminal. Using a socket wrench, unscrew the nut on the negative terminal and remove the cable clamp completely. After the clamp is removed, wait for at least five seconds then reconnect the negative terminal.
Which is the most recent information on passive restraint systems?
The contents are based on the information available at the time of publication. To ensure that the most recent information is used, always refer to the vehicle maker’s technical information before working with airbags and other passive restraint systems.