Section 2

Section 2 - AIR FLOW METER DIAGNOSTIC PROCEDURES

NOTE:
Procedures listed below do not apply to the following model/year vehicles:
1988 - 92 B2600
1989 - 90 RX-7 (up to and including vehicles with a VIN of
JM1FC3***L0806489
1993 RX-7

1. Check the air intake temperature sensor resistance.

a) Remove air flow meter and allow to sit until its temperature is the same as the ambient temperature.

b) Using a multi tester, measure and record the resistance of the intake air temperature sensor terminals (THAAE2) and the atmospheric temperature at that time.





NOTE:
Use a multi tester with an accuracy equivalent of the FLUK 70 series.








CAUTION:
Refer to the illustration shown and the "Standard Values" table shown when measuring resistance.

NOTE:
Use a multi-tester with the accuracy equivalent of a FLUK 70 Series.

NOTE:
The following models have airflow meters with measuring plates and should be diagnosed using the method listed below:

1986 - 89 323 1990 - 93 323/Protege

1990 - 92 626/MX-6 1990 - 91 929

1988 - 93 MPV 1990 - 93 MX-5

1993 MX-3 (1.6 Litre)





1. Check for smooth movement of the measuring plate. If no problem is found, reinstall the air flow meter.

2. If no problem is found in the air flow meter, contact the Technical Hotline for assistance.





AIR FLOW METER CHECK SHEET

NOTE:
Attach the check sheet to the repair order. If requested to return the failed air flow meter to Mazda, attach a copy of the check sheet and repair order.