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)

SEE MORE:

Data List / Active Test

DATA LIST / ACTIVE TEST DATA LIST NOTICE: In the following table, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not. HINT: Using the GTS to read the Data List allows the values or states o

Basic Inspection

CAUTION / NOTICE / HINT When a malfunction is not confirmed by the DTC check, troubleshooting should be carried out for all circuits considered to be possible causes of the problem. In many cases, by carrying out the basic engine check shown in the following procedure, the location of the problem ca

Toyota Corolla Cross: Inspection

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