1.
Active fault or historical fault counter is greater or equal to 10
As soon as the operating voltage is applied to the SRSCM ignition input, the SRSCM activates the warning lamp for a bulb check.
The lamp shall turn on for 6 seconds during the initialization phase and be turned off afterward. However, in order to indicate the driver, the warning lamp shall turn on for 6 seconds and off for one second then on continuously after the operating voltage is applied if any active fault exists.
Active fault or historical fault counter is greater or equal to 10
Normal or historical fault counter is less than 10
When turning the ignition switch ON during variant coding (EOL) mode, the airbag warning lamp is turned on and blinks at intervals of 1 second till the coding is completed.
In case the variant coding is normally completed, the airbag warning lamp is turned on for 6 seconds, and then turned off. Otherwise the airbag warning lamp continuously blinks at intervals of 1 second.
In case the variant coding is normally completed
In case the variant coding is not completed
When there is current fault in airbag system or SRSCM internal fault, the variant coding (EOL) can’t be completed. In this case, do the variant coding (EOL) procedure again after troubleshooting with the GDS.
There are certain fault conditions in which the SRSCM cannot function and thus cannot control the operation of the standard warning lamp. In these cases, the standard warning lamp is directly activated by appropriate circuitry that operates independently of the SRSCM. These cases are:
Loss of battery supply to the SRSCM : warning lamp turned on continuously.
Loss of internal operating voltage : warning lamp turned on continuously.
Loss of Microprocessor operation : warning lamp turned on continuously.
SRSCM not connected : warning lamp turned on continuously through the shorting bar.
The SRSCM is designed with circuitry and software to drive a PAD lamp, which is used for depowered airbag system. For the PAD indicator circuitry to function properly, both the SRSCM and PAD indicator are sourced from the same ignition line. After ignition on, the PAD indicator will be turned on for 4 seconds and off for 3 seconds during the initialization phase. Thereafter the lamp will be turned on as long as the PAD switch is in the disabled position.
The PAD switch affects the activation of the front passenger airbag only and the switch is controlled manually. The PAD switch will be functioned as follows:
PAD Switch status | PAD Lamp | PAB |
Phase-up | ON → OFF | Enabled |
OFF | ON | Disabled |
ON | OFF | Enabled |
Fault | OFF | Enabled |
