Mass Air Flow (MAF) Meter: Inspection

INSPECT MAF METER RESISTANCE

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

Resistance:

MAF METER TERMINALS RESISTANCE

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 MAF Terminals THA & E2

G02600774

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.
  
  Fig 2: Connecting Tester Probe To Terminal VG & Terminal E2G
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Blow air into the MAF meter, and check that the voltage fluctuates.
  If operation is not as specified, replace the MAF meter.
5. Turn the ignition switch LOCK.
6. Disconnect the MAF meter connector.