GS300 & SC300

Remove engine cover. Remove battery cover and air cleaner intake hose. Variable Valve Timing (VVT) sensor is located at top center of each cylinder head. Disconnect VVT sensor connector. Measure resistance between VVT sensor terminals. Resistance should be 835-1400 ohms at 14-122°F (-10-50°C), or 1060-1645 ohms at 122-212°F (50-100°C). If resistance is not as specified, replace VVT sensor.