Function of SRS Warning Lamp
FUNCTION OF SRS WARNING LAMPa. Primary check
1. Turn the ignition switch OFF. Wait at least 2 seconds, and then turn the ignition switch ON. The SRS warning lamp illuminates for approximately 6 seconds and the diagnosis of the SRS (including the seat belt pretensioner) is performed.
HINT: If trouble is detected during the primary check, the SRS warning lamp remains on even after the primary check period (approximately 6 seconds) has elapsed.
b. Constant check
1. After the primary check, the airbag sensor center constantly monitors the SRS for trouble.
HINT: If trouble is detected during the constant check, the airbag sensor center functions as follows:
- The SRS warning lamp illuminates.
- The SRS warning lamp turns off and then illuminates. This blinking pattern indicates the source voltage drop. After the source voltage returns to normal for 10 seconds, the SRS warning lamp turns off.
c. Review
1. When the SRS is normal:
The SRS warning lamp illuminates only during the primary check period (for approximately 6 seconds after the ignition switch is turned to ON).
2. When the SRS has trouble, one of the following may occur:
- The SRS warning lamp remains on even after the primary check period has elapsed.
- The SRS warning lamp turns off after the primary check, but illuminates again during the constant check.
- The SRS warning lamp does not illuminate when turning the ignition switch from OFF to ON.
HINT: The airbag sensor assembly center keeps the SRS warning lamp illuminated if an airbag has been deployed.