Subaru Forester Manuals 2018 Forester Owner's Manual | Page 560

11-24 Maintenance and service/Tires and wheels temperature outside. By way of example, the following table shows the required tire pressures that correspond to various out- side temperatures when the temperature in the garage is 608F (15.68C). Example: Ti r e s i z e : P 2 0 5 / 5 5 R 1 6 8 9 V a n d P205/50R17 88V Standard tire pressures: Front: 33 psi (230 kPa, 2.3 kgf/cm 2 ) Rear: 32 psi (220 kPa, 2.2 kgf/cm 2 ) Garage temperature: 608F (15.68C) Outside temperature Adjusted pressure [psi (kPa, kgf/cm 2 )] Front Rear 308F (−18C) 36 (250, 2.5) 35 (240, 2.4) 108F (−128C) 38 (260, 2.6) 37 (255, 2.55) −108F (−238C) 40 (275, 2.75) 39 (270, 2.7) If the low tire pressure warning light illuminates when you drive the vehicle in cold outside air after adjusting the tire pressures in a warm garage, re-adjust the tire pressures using the method described above. Then, increase the vehicle speed to at least 25 mph (40 km/h) and check to see that the low tire pressure warning light turns off a few minutes later. If the low tire pressure warning light does not turn off, the tire pressure monitoring system may not be functioning normally. In this event, go to a SUBARU dealer to have the system inspected as soon as possible. While the vehicle is driven, friction be- tween tires and the road surface causes the tires to warm up. After illumination of the low tire pressure warning light, any increase in the tire pressures caused by an increase in the outside air temper