2004 Toyota Prius Owners Manual - Page 133

Emissions inspection and maintenance (I/M) programs Your vehicle may not pass a state emission inspection if the malfunction indicator lamp remains on. Contact your Toyota dealer to check your vehicle's emission control system and OBD (On−Board Diagnostics) system before taking your vehicle for the inspection. For details, see "Emissions inspection and maintenance (I/M) programs" on page 272. (e) Master Warning Light ( (f) "ABS" Warning Light The light comes on when the "IG−ON" mode is enabled. If the anti−lock brake system and the brake assist system work properly, the light turns off after the "READY" light comes on. Thereafter if the system malfunctions, the light comes on again. When the "ABS" warning light is on (and the brake system warning light is off), the anti−lock brake system does not operate, but the brake system still operates conventionally. When the "ABS" warning light is on (and the brake system warning light is off), the anti−lock brake system does not operate but the brake assist system still operates. In this case, the wheels could lock up during a sudden braking or braking on slippery road surfaces. If either of the following conditions occurs, this indicates a malfunction somewhere in the parts monitored by the warning light system. Contact your Toyota dealer as soon as possible so service the vehicle. D The light does not come on when the "IG−ON" mode is enabled, or the light remains on after the "READY" light comes on. D The light comes on while you are driving. A warning light turning on briefly during operation does not indicate a problem. CAUTION If the "ABS" warning light remains on together with the red brake system warning light, immediately stop your vehicle at a safe place and contact your Toyota dealer. In this case, not only the anti−lock brake system will fail but also the vehicle will become extremely unstable during braking. Either of the following conditions may occur, but does not indicate the malfunction: ) If the master warning light comes on, the warning light for the faulty system is highlighted or the message such as "Please press "P" to engage Park." and "The batteries will not be charged if the transaxle is in Neutral N." appears on the multi−information display. (See "Service reminder indicators and warning buzzers- -Multi− information display" on page 124 or "Precautions for use" on page 12 or "Fuel gauge" on page 114 for instructions.) D The light may stay on for about 60 seconds after the hybrid system is started. It is normal if it turns off after a while. 121