Output Signals. SRS

Output signals

Electrical signal for activating airbags/seat belt tensioners




To activate the igniters that deploy the airbags/seat belt tensioners, the sensor module transmits pulses in the form of AC signals through the ignition cables. At least 5 pulses are required to trigger an igniter.
A capacitor, built into the connector between the SRS ignition cable and the airbags/seat belt tensioners, allows this pulsing signal to pass through it while blocking a DC signal.
This means that connected airbags/seat belt tensioners in the SRS 6.2 system cannot be activated by unintentionally connecting a DC voltage during fault tracing. This protection ceases when the SRS ignition cable connector is disconnected from the airbag/seat belt tensioner, as the capacitor is in the SRS ignition cable connector.

Warning! Under no circumstances use an ohmmeter or other live measuring instrument to take readings on a disconnected non deployed airbag/seat belt tensioner. This could deploy the airbag/seat belt tensioner.