Function of SRS Warning Light

FUNCTION OF SRS WARNING LIGHT

a. Primary check.
1. Turn the ignition switch to the LOCK position. Wait for at least 2 seconds, then turn the ignition switch to the ON position. The SRS warning light comes on for approximately 6 seconds and the air bag system diagnosis (including the seat belt protensioner and occupant classification system) is performed.

HINT: If trouble is detected during the primary check, the SRS warning light remains on or blinks even after the primary check period (for approximately 6 seconds) has elapsed.

b. Constant check.
1. After the primary check, the air bag sensor assy center constantly monitors the SRS air bag system for trouble.

HINT: If trouble is detected during the constant check, the air bag sensor assy center functions as follows:
- The SRS warning light comes on or blinks.
- The SRS warning light goes off, and then comes on. This blinking pattern indicates the source voltage drop. The SRS warning light goes off 10 seconds after the source voltage returns to normal.

c. Review.
1. When the air bag system is normal:
The SRS warning light comes on only during the primary check period (for approximately 6 seconds after the ignition switch is turned to the ON position).

2. When the air bag system has trouble:
- The SRS warning light remains on or blinks even after the primary check period has elapsed.
- The SRS warning light goes off after the primary check, but comes on or blinks again during the constant check.
- The SRS warning light does not come on when turning the ignition switch from the LOCK to ON position.

HINT: The air bag sensor assy center keeps the SRS warning light on if the air bag has been deployed.