Function of SRS Warning Light
FUNCTION OF SRS WARNING LIGHTa. Primary check
1. Turn the power switch off. Wait for at least 2 seconds, then turn the power switch on (IG). The SRS warning light comes on for approximately 6 seconds and the diagnosis of the SRS airbag system (including the seat belt) 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 after the power switch is turned on (IG)) has elapsed.
b. Constant check
1. After the primary check, the airbag ECU assy monitors the SRS airbag system for trouble.
HINT: If trouble is detected during the constant check, the airbag ECU assy functions as follows:
- The SRS warning light comes on.
- 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 SRS airbag system is normal:
The SRS warning light comes on only during the primary check period (for approximately 6 seconds after the power switch is turned on (IG)).
2. When the SRS airbag system has trouble:
- The SRS warning light remains on.
- 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 power switch from off to on (IG).
HINT: The airbag ECU assy keeps the SRS warning light on if one of the airbags has been deployed.