Air Bag Systems: Testing and Inspection

WARNING LAMP ACTIVATION
1. Active fault or historical fault counter is greater or equal to 10




2. Normal or historical fault counter is less than 10




3. Loss of battery supply to the SRSCM : warning lamp turned on continuously.
4. Loss of internal operating voltage : warning lamp turned on continuously.
5. Loss of SRSCM operation : warning lamp turned on continuously.
6. SRSCM not connected : warning lamp turned on continuously through the shorting bar.
7. Reset by the Watchdog Trigger failure : warning lamp flashed or turned on continuously.

TELLTALE LAMP ACTIVATION
DESCRIPTION




The Telltale Lamp indicates the Passenger Airbag(PAB) enable disable status based on occupant status of passenger seat. If the passenger seat is occupied with child (or child seat), the Passenger Airbag is disabled and the Telltale Lamp is turned ON to inform the driver that the PAB is disabled.
As soon as operating voltage is applied to the SRSCM ignition input, the SRSCM activates telltale lamp prove out. OCS will send an indeterminate status to the SRSCM as a default setting for passenger airbag deployment during the prove out period. After crash if OCS gets reset and sends the indeterminate status, the telltale lamp will be ON as long as the occupant status is in the indeterminate status. Occupant status information and telltale status are as below table.





After ignition on, telltale lamp will turn on for 4 seconds and turn off for 3 seconds during the initialization phase and be turned off afterward until receive first valid suppression message from OCS system.