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Mass Air Flow Meter: Inspection

INSPECT MASS AIR FLOW METER SUB-ASSEMBLY

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

There is no foreign material.

Fig 1: Inspecting Mass Air Flow Meter Sub-Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Check the intake air temperature sensor (Built into the MAF meter).

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

Standard resistance

STANDARD RESISTANCE SPECIFICATION

Tester Connection	Condition	Specified Condition
5 (THA) - 4 (E2)	-20°C (-4°F)	13.6 to 18.4 kΩ
	20°C (68°F)	2.21 to 2.69 kΩ
	60°C (140°F)	0.49 to 0.67 kΩ

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

Fig 2: Identifying Mass Air Flow Meter Connector

G06190177

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002