SRS Indication

The supplemental restraint system module (SRS) checks the system once every second. A diagnostic trouble code (DTC) is stored and the SRS indicator lamp lights if the same fault is detected 10 times in one ignition cycle.

SRS indication is partially via the SRS indicator lamp which changes between red and orange depending on how serious the fault is and partially via a text message display. The SRS indicator lamp lights when the ignition is switched on. If no faults are registered by the control module, either internally or from the sensors, wiring or igniters, a signal is transmitted on the controller area network (CAN) to the driver information module (DIM) confirming that the SRS indicator lamp can be switched off. If no faults are detected when the ignition is switched on, the lamp will remain lit for 7 seconds. The lamp goes out when the system has been checked and is operating without 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 by the supplemental restraint system module (SRS) on the controller area network (CAN).

The control module has an EEPROM memory which retains data about diagnostic trouble codes (DTCs) even when the battery has been disconnected.

The driver information module (DIM) continuously indicates to the supplemental restraint system module (SRS) whether the SRS indicator lamp is working or not. If the lamp stops working, the general warning lamp lights up and a text message is displayed in the text box.