Inspection [12/2017 - ]: 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.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Intake Air Temperature Sensor (Thermistor)

There is no foreign matter.

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

Check the intake air temperature sensor (thermistor) resistance.

*A	for Bank 1
*B	for Bank 2
*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 (for Bank 1)

Tester Connection	Condition	Specified Condition
D17-4 (THAR) - D17-2 (E2GR)	Always	0.47 to 19.3 kΩ

Standard Resistance (for Bank 2)

Tester Connection	Condition	Specified Condition
D16-4 (THA) - D16-2 (E2G)	Always	0.47 to 19.3 kΩ

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