Mass Air Flow (MAF) Meter: Inspection

INSPECT MAF METER RESISTANCE

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

TERMINALS, RESISTANCE AND TEMPERATURE SPECIFICATION

Terminals	Resistance	Temperature
THA - E2	13.6 - 18.4 kΩ	-20°C (-4°F)
THA - E2	2.21 - 2.69 kΩ	20°C (68°F)
THA - E2	0.49 - 0.67 kΩ	60°C (140°F)

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

Fig 1: Measuring Resistance Between Terminals THA And E2

G02574975

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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