Mass Air Flow (MAF) Meter: Inspection

INSPECT MAF METER RESISTANCE

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

Fig 1: Inspecting MAF Meter Resistance

G04241330

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

MAF METER RESISTANCE SPECIFICATIONS

Temperature	Resistance
at -20°C (-4°F)	13.6 - 18.4 kΩ
at 20°C (68°F)	2.2 - 2.7 kΩ
at 60°C (140°F)	0.5 - 0.7 kΩ

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

INSPECT MAF METER OPERATION
1. Connect the MAF meter connector.
2. Using a voltmeter, connect the positive (+) tester probe to terminal VG, and negative (-) tester probe to terminal E2G.
3. Turn the ignition switch ON.
4. Blow air into the MAF meter, and check that the voltage fluctuates.
  
  Fig 2: Inspecting MAF Meter Operation
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If operation is not as specified, replace the MAF meter.
5. Turn the ignition switch OFF.
6. Disconnect the MAF meter connector.