TDC Sensor

Unplug crank angle sensor connector. Measure resistance between Brown (Orange/Blue on Prelude) and Blue (White/Blue on Prelude) terminals at sensor. Resistance should be 650-850 ohms. Measure insulation resistance between Brown (Orange/Blue on Prelude) and Blue (White/Blue on Prelude) terminals and crank angle sensor housing. Resistance should be 100,000 ohms or more.