(7) Boost Pressure Sensor a. In order to correct the full-load injection volume, this sensor converts the intake air pressure (absolute pressure) into an electrical signal, then amplifies it into a voltage signal to the computer. A-VCC ECU VPIM +5V 4.0 3.45 Output Valtage (V) VPIM 2.0 A-GND 0.5 0 100 200 300 {1.019} {2.038} {3.057} Intake Air Pressure PIM (kPa {kg/cm 2 }) Q000279E (8) Air Flow Sensor a. Detects the intake airflow (mass flow rate) in the hot-wire type airflow meter. b. The intake airflow is converted to a voltage value and this signal is transmitted to the ECU. E 2 THA V G E 2G +B Airflow Sensor Intake Air Temperature Sensor Q000280E c.
The airflow sensor is installed to the rear of the air cleaner, and consists of a heater, thermometer, intake air temperature sensor, and control circuit (base). It diverts a portion of the intake air from the air cleaner and measures the intake airflow at the hot-wire measuring part. Outline Diagram of Hot-Wire Type Airflow Meter Throttle Body Temperature Compensating Resistor (Hot-Wire) Bypass Flow Intake Air Temperature Sensor Heating Resistor (Hot-Wire) Intake Air from Air Cleaner 28 Q000285E