SRS Warning Light Remains ON: Description

The SRS warning light is located on the combination meter assembly.

When the SRS condition is normal, the SRS warning light illuminates for approximately 6 seconds after the power switch is turned from off to on (IG), and then goes off automatically.

If there is a malfunction in the SRS, the SRS warning light illuminates or blinks to inform the driver of the problem. When terminals TC and CG of the DLC3 are connected, the SRS warning light blinks to indicate DTCs.

The airbag ECU assembly is equipped with a voltage-increase circuit (DC-DC converter) in case the source voltage decreases. When the auxiliary battery voltage decreases, the voltage-increase circuit (DC-DC converter) boosts the SRS voltage up to the normal level.

Malfunctions relating to auxiliary battery voltage decreases cause the SRS warning light to illuminate. However, no DTCs are recorded in the airbag ECU assembly. The SRS warning light goes off automatically when the source voltage returns to normal.

Signals to illuminate the SRS warning light are transmitted from the airbag ECU assembly to the combination meter assembly through the CAN communication system via the power management control ECU.