Toyota 89420-26100 Manifold Absolute Pressure Sensor

The Toyota 89420-26100 is a manifold absolute pressure (MAP) sensor designed to measure intake manifold pressure and provide a voltage signal proportional to pressure changes to the engine control unit (ECU). This data is critical for calculating air density and determining fuel injection duration and ignition timing. The sensor utilizes a silicon piezoresistive sensing element with integrated signal conditioning circuitry. It operates on a regulated 5V DC supply and outputs a ratiometric analog voltage signal typically ranging from 0.5V at low pressure (high vacuum) to 4.5V at high pressure (atmospheric or boost). The sensing range covers 20 kPa to 115 kPa absolute, suitable for naturally aspirated gasoline applications. Constructed with a glass-filled polyphenylene sulfide (PPS) housing for thermal stability and chemical resistance. The electrical interface uses a sealed 3-terminal Toyota-specific connector. The pressure port features a barbed or O-ring sealed interface for direct manifold mounting. Manufactured by Denso (part number 100798-5340) to Toyota OEM specifications for durability under under-hood temperature cycles from -40°C to 130°C.