1998 Toyota 4Runner Owners Manual - Page 66

4RUNNER (1998) This SRS airbag system has a service reminder indicator to inform the driver of operating problems. If either of the following conditions occurs, this indicates a malfunction of the airbags. Contact your Toyota dealer as soon as possible to service the vehicle. D The light does not come on when the ignition key is turned to the "ACC" or "ON" position, or remains on. D The light comes on while driving.