Inspection [09/2014 - ]: Procedure

INSPECT MASS AIR FLOW METER SUB-ASSEMBLY

Perform a visual check for any foreign matter on the intake air temperature sensor (thermistor) of the mass air flow meter sub-assembly shown in the illustration.

There is no foreign matter.

If the result is not as specified, clean the intake air temperature sensor (thermistor).

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Intake Air Temperature Sensor (Thermistor)

Clean the intake air temperature sensor (thermistor).

NOTE:

Do not contact the mass air flow meter sub-assembly with the nozzle of the air blow gun.
Do not insert the nozzle of the air blow gun into the intake air temperature sensor (thermistor) area.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Air Blow Gun
*b	10 mm (0.394 in.)
*c	Intake Air Temperature Sensor (Thermistor)

Using an air blow gun, clean the intake air temperature sensor (thermistor) area of the mass air flow meter sub-assembly by applying approximately 10 intermittent bursts of air to the intake air temperature sensor (thermistor) area at a pressure of approximately 392 to 981 kPa (4.0 to 10.0 kgf/cm₂ , 57 to 142 psi).

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Air Blow Duration
*b	3 to 6 Seconds
*c	1 Second
*d	Air Blowing
*e	Air Stopped

HINT:

After performing cleaning, read the value of Data List item "MAF" using the Techstream and if the value is not as specified, replace the mass air flow meter sub-assembly.

Check the intake air temperature sensor (thermistor) resistance.

*a	Component without harness connected (Mass Air Flow Meter Sub-assembly)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
4 (THA) - 2 (E2G)	Always	0.47 to 19.3 kΩ

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