Airflow Meter

Intake air temperature sensor and fuel pump switch are contained in the airflow meter. Determine terminal identification. See Fig 1 .

Using ohmmeter, measure resistance between designated terminals. See AIRFLOW METER RESISTANCE table. Reading must be within specification.

AIRFLOW METER RESISTANCE

Terminals

Ohms

Temperature

E2 & Vs - Non-Turbo

50-500

N/A

E2 & Vs - Turbo

200-600

N/A

E2 & Vref - Non-Turbo

200-500

N/A

E2 & Vref - Turbo

200-400

N/A

E2 & THAa ⁽¹⁾

10,000-20,000

-4°F (-20°C)

E2 & THAa ⁽¹⁾

4000-7000

32°F (0°C)

E2 & THAa ⁽¹⁾

2000-3000

68°F (20°C)

E2 & THAa ⁽¹⁾

900-1300

104°F (40°C)

E2 & THAa ⁽¹⁾

400-700

140°F (60°C)

E1 & Fc

Infinity

N/A

⁽¹⁾	Intake air temperature sensor.

Ensure measuring plate moves freely in airflow meter. Remaining terminals must be checked for fuel pump switch and measuring plate resistances. See Fig 1 . Attach ohmmeter to specified terminals to check fuel pump switch and measuring plate resistance. See FUEL PUMP SWITCH & PLATE RESISTANCE table.

FUEL PUMP SWITCH & PLATE RESISTANCE

Fig 1: Check Airflow Meter Resistance & Terminal Identification

Courtesy of MAZDA MOTORS CORP.