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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: Inspecting Mass Air Flow Meter
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION

*1 Platinum Hot Wire (Heater)

Check the resistance.

Fig 2: Checking Resistance Of Mass Air Flow Meter

GTY189304

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TEXT IN ILLUSTRATION

*a	Component without harness connected (MAF Meter)	*b	Resistance
*c	Temperature	*d	Acceptable

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 mass air flow meter.