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Mass Air Flow Meter: Inspection: Inspection

INSPECT MASS AIR FLOW METER

Perform a visual check for any foreign matter on the platinum hot wire (heater) of the mass air flow meter shown in the illustration.
OK

There is no foreign matter.

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

Fig 1: Identifying Platinum Hot Wire
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check the IAT sensor.

Fig 2: Temperature And Resistance Graph

GTY124927

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Measure the resistance according to the value(s) in the table below.

Standard Resistance

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

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