Mass Air Flow (MAF) Meter: Inspection

1. Disconnect the MAF meter connector.
2. Remove the 2 screws, MAF meter and gasket.
   Fig 1: Removing MAF Meter

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Inspecting MAF Meter Resistance (1 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Using an ohmmeter, measure the resistance between terminals THA and E2.

Fig 3: Inspecting MAF Meter Resistance (2 Of 2)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the resistance is not as specified, replace the MAF meter.

Fig 4: Identifying MAF Meter Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the MAF meter connector.
2. Connect the negative (-) terminal cable to the battery.
3. Turn the ignition switch ON.
4. Using a voltmeter, connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.
5. Blow air into the MAF meter, and check that the voltage fluctuates.

   If operation is not as specified, replace the MAF meter.

6. Turn the ignition switch OFF.
7. Disconnect the negative (-) terminal cable from the battery.
8. Disconnect the MAF meter connector.

1. Install the gasket to the MAF meter.
2. Install the MAF meter with the 2 screws.
   1. Torque: 10.7 N.m (109 kgf.cm 8 ft.lbf) 
3. Connect the MAF meter connector.