Internal function test
NOTE:
The airbag system of the Cayenne includes a system check, which runs in the background and is activated when the ignition is switched on. In comparison to other model ranges, the airbag warning light remains on after the system check is complete (only if the ignition is still on and the engine is not started) and only goes out again when the engine is started and no faults are detected in the airbag system.
When the ignition (terminal 15) is switched on, a control phase is run in order to check the activation/deactivation of the passenger's air-bag ignition circuit, including the airbag switch and the indicator light (passenger's airbag OFF display). This control phase is evident by the fact that the indicator light lights up for approx. four seconds (but not when the airbag switch is OFF, i.e. the passenger's airbag is deactivated). If implausible statuses are detected in the passenger's airbag ignition circuit, the indicator light starts flashing and the airbag warning light may also come on. If such a situation arises, read out the fault memory and work through the diagnosis/troubleshooting instructions.