Mass Air Flow (MAF) Meter: Inspection

Remove the 2 screws and MAF meter.

Fig 1: Removing Screws

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Using an ohmmeter, measure the resistance between terminals THA and E2.
   TERMINALS AND REFERENCE VALUE
   
   

   Terminals	Resistance	Temperature
   THA - E2	12.5 - 16.9 kΩ	-20°C (-4°F)
   THA - E2	2.19 - 2.67 kΩ	20°C (68°F)
   THA - E2	0.50 - 0.68 kΩ	60°C (140°F)

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

   Fig 2: Measuring Resistance Between Terminals THA And E2

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect for operation.
   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.

Install the MAF meter with the 2 screws.