2009 Nissan Altima Owner's Manual - Page 91

● If the light illuminates while driving, avoid sudden steering maneuvers or abrupt braking, reduce vehicle speed, pull off the road to a safe location and stop the vehicle as soon as possible. Driving with under-inflated tires may permanently damage the tires and increase the likelihood of tire failure. Serious vehicle damage could occur and may lead to an accident and could result in serious personal injury. Check the tire pressure for all four tires. Adjust the tire pressure to the recommended COLD tire pressure shown on the Tire and Loading Information label located in the driver's door opening to turn the low tire pressure warning light OFF. If the light still illuminates while driving after adjusting the tire pressure, a tire may be flat. If you have a flat tire, replace it with a spare tire as soon as possible. ● When a spare tire is mounted or a wheel is replaced tire pressure will not be indicated, the TPMS will not function and the low tire pressure warning light will flash for approximately 1 minute. The light will remain on after 1 minute. Contact your NISSAN dealer as soon as possible for tire replacement and/or system resetting. ● Replacing tires with those not originally specified by NISSAN could affect the proper operation of the TPMS. NISSAN Intelligent Key™ warning light The Intelligent Key warning light warns of a malfunction with the electrical steering lock system or the Intelligent Key system. After the ignition switch is placed in the ON position, this light comes on for about 2 seconds and then turns off. If the light comes on while the engine is stopped, it may not be possible to free the steering lock or to start the engine. If the light comes on while the engine is running, you can drive the vehicle. However, in these cases, contact a NISSAN dealer for repair as soon as possible. See "NISSAN Intelligent Key™ " in the "Predriving checks and adjustments" section. CAUTION ● The TPMS is not a substitute for the regular tire pressure check. Be sure to check the tire pressure regularly. ● If the vehicle is being driven at speeds of less than 16 MPH (25 km/h), the TPMS may not operate correctly. ● Be sure to install the specified size of tires to the 4 wheels correctly. Seat belt warning light and chime The light and chime remind you to fasten your seat belts. The light illuminates whenever the ignition switch is placed in the ON or START position and remains illuminated until the driver's seat belt is fastened. At the same time, the chime sounds for about 6 seconds unless the driver's seat belt is securely fastened. Master warning light This light comes on when various vehicle information display warnings appear. Instruments and controls 2-13