Mass Air Flow (MAF) Sensor/Intake Air Temperature (IAT) Sensor

The mass air flow (MAF) sensor/intake air temperature (IAT) sensor contains a hot wire, a cold film, and a thermistor. The sensor is in the intake air passage. The resistance of the hot wire, the cold film, and the thermistor changes due to intake air temperature and air flow. The control circuit in the MAF sensor controls the current to keep the hot wire at a set temperature. The current is converted to voltage in the control circuit, then output to the PCM.

Fig 1: Identifying Mass Air Flow (MAF) Sensor/Intake Air Temperature (IAT) Sensor

Courtesy of AMERICAN HONDA MOTOR CO., INC.

Output Shaft (Countershaft) Speed Sensor 

This sensor detects output shaft (countershaft) speed.

Fig 2: Identifying Output Shaft (Countershaft) Speed Sensor

Courtesy of AMERICAN HONDA MOTOR CO., INC.