Toyota Corolla Cross: Inspection

Toyota Corolla Cross (2022-2025) Service Manual / Engine & Hybrid System / M20a-fks (engine Control) / Mass Air Flow Meter / Inspection

INSPECTION

PROCEDURE

1. INSPECT MASS AIR FLOW METER SUB-ASSEMBLY

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

OK:

There is no foreign matter.

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

*a	Thermistor

(b) Clean the intake air temperature sensor (thermistor).

NOTICE:

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.

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

(1) 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).

HINT:

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

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

(1) 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.

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

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Toyota Corolla Cross: Inspection

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