Operation CHARM: Car repair manuals for everyone.
Home >> Mazda >> 1998 >> Protege ES L4-1839cc 1.8L DOHC >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Sensors and Switches - Computers and Control Systems >> Air Flow Meter/Sensor >> Testing and Inspection >> Air Flow Sensor Test
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Air Flow Sensor Test

AIR FLOW SENSOR TEST

1. Check the mass air flow sensor for damage and cracks.
2. Connect the SSTs (NGS tester) to the data link connector-2.




3. Select the "PID/DATA MONITOR AND RECORD" function and press TRIGGER.
4. Select "MAF V" on the NGS tester display. The NGS tester measures and shows the voltage.




Voltage Specification

5. If not as specified, inspect the harness and connector between the mass air flow sensor and the PCM terminal.
6. It there is correct the terminal voltage and harness continuity, replace the mass airflow sensor.

NOTE: The scan tool shows the mass airflow rate and load value.




Data Specification
pro multis · About Operation CHARM