Function of SRS Warning Light
FUNCTION OF SRS WARNING LIGHTa. Primary check.
1. Turn the ignition switch to the LOCK position. After 2 seconds or more, turn the ignition switch to the ON position. The SRS warning light comes on for approximately 6 seconds and the diagnosis of the SRS airbag system (including the seat belt pretensioner and front passenger occupant classification system) is performed.
HINT: If trouble is detected during the primary check, the SRS warning light remains on even after the primary check period (for approximately 6 seconds) has elapsed.
b. Constant check.
1. After the primary check, the center airbag sensor assembly constantly monitors the airbag system for trouble.
HINT: If trouble is detected during the constant check, the center airbag sensor assembly functions as follows:
- The SRS warning light comes on.
- The SRS warning light goes off, and then comes on. This blinking pattern indicates a source voltage drop. The SRS warning light goes off 10 seconds after the source voltage returns to normal.
c. Review.
1. When the airbag system is normal:
The SRS warning light comes on only for the primary check period (for approximately 6 seconds after the ignition switch is turned to the ON position).
2. When the airbag system has trouble:
- The SRS warning light remains on even after the primary check period has elapsed.
- The SRS warning light goes off after the primary check, but comes on again during the constant check.
- The SRS warning light does not come on when turning the Ignition switch from the LOCK to the ON position.
HINT: The center airbag sensor assembly keeps the SRS warning light on if the airbag has been deployed.