Mass Air Flow Meter: Inspection

INSPECT MASS AIR FLOW METER

Check the operation.
1. Apply battery voltage across terminals 1 (+B) and 2 (E2G).
2. Using a voltmeter, connect the positive (+) tester prove to terminal 3 (VG) and the negative (-) tester prove to terminal 2 (E2G).
3. Blow air into the mass air flow meter and check that the voltage fluctuates.
  If the voltage does not fluctuate, replace the mass air flow meter.
  
  Fig 1: Inspecting Mass Air Flow Meter
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check the resistance.

Using an ohmmeter, measure the resistance between the terminals.

Standard

TESTER CONNECTIONS SPECIFIED CONDITIONS CHART

Tester Connection	Specified Condition
4 (THA) - 5 (E2)	12.5 to 16.9 kΩ at -20°C (-4°F)
4 (THA) - 5 (E2)	2.19 to 2.67 kΩ at 20°C (68°F)
4 (THA) - 5 (E2)	0.50 to 0.68 kΩ at 60°C (140°F)

If the result is not as specified, replace the mass air flow meter.

Fig 2: Inspecting Mass Air Flow Meter

G05677351

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002