The SRS Indication

The SRS Indication

The Supplemental Restraint System Module (SRS) checks the system once a second. The same fault must be detected 10 times during the same ignition before a diagnostic trouble code (DTC) is stored and the SRS (supplemental restraint system) indicator lamp lights up.

SRS (supplemental restraint system) indication is carried out partially via the SRS (supplemental restraint system) indicator lamp, a warning lamp which shifts between red and orange depending on how serious the faults are, and partially via a text message display.

The SRS (supplemental restraint system) indicator lamp lights with the ignition on. If no faults are found by the control module, either internally or on the sensor, wiring or igniter, a signal is transmitted via the Controller Area Network to the driver information network to switch off the SRS warning lamp. If no faults are detected with the ignition on, the lamp continues to light up for 7 seconds. The lamp goes out when the system is tested and functions without any faults.

If a fault is detected in the supplemental restraint system module (SRS), the SRS indicator lamp lights and a text message is displayed in the text box. Information about which lamp should be lit is transmitted from the supplemental restraint system module (SRS) on the controller area network (CAN).

The supplemental restraint system module (SRS) contains an EEPROM memory. This contains information about diagnostic trouble codes (DTCs) even when the battery has been disconnected.

The driver information module (DIM) continuously informs the Supplemental Restraint System Module (SRS) whether the SRS indicator lamp is functioning. If the lamp stops working, the general warning lamp lights up and a text message is displayed in the text box.


NOTE: In the event of a fault code being registered for ignition resistance being too high or too low, never measure resistance of the airbags or seat belt tensioners. Use a special tool with the same resistance as the airbag or the seat belt tensioners when fault-tracing.