2004 Subaru Impreza Owner's Manual - Page 160

Instruments and controls tires are not all the same size and brand, the rear differential will be heavily loaded when the vehicle is driven, resulting in an abnormally high oil temperature. " The rear differential oil will deteriorate if its temperature increases enough for the rear differential oil temperature warning light to come on. It is advisable to have the rear differential oil replaced as soon as possible. switch is turned to the "ON" position, but it does not go out even when the vehicle speed exceeds approximately 8 mph (12 km/h). " The warning light comes on during driving. If these occur, have the ABS system repaired at the first available opportunity by your SUBARU dealer. With a vehicle equipped with an EBD system, the ABS warning light comes on together with the brake system warning light if the EBD system becomes faulty. For further details of the EBD system fault warning, refer to "Brake system warning light". ! ABS warning light (U.S.) (Canada) The ABS warning light comes on when the ignition switch is turned to the "ON" position and goes out after about two seconds. This is an indication that the ABS system is working properly. NOTE If the warning light behaves as follows, the ABS system may not work properly. When the warning light is on, the ABS function shuts down; however, the conventional brake system continues to operate normally. " The warning light does not come on when the ignition switch is turned to the "ON" position. " The warning light comes on when the ignition If the warning light behavior is as described below, the ABS system may be considered normal. " The warning light comes on right after the engine is started but goes out immediately, remaining off. " The warning light remains on after the engine has been started, but it goes out when the vehicle speed reaches about 8 mph (12 km/h). " The warning light comes on during driving, but it goes out immediately and remains off. When driving with an insufficient battery voltage such - CONTINUED - 3-23