Using the NGS Tester

1. Check the mass air flow sensor for damage and cracks.




2. Connect the SSTs (NGS tester) to the data link connector.
3. Turn the ignition switch to ON.
4. Select the "PID/DATA MONITOR AND RECORD" function on the NGS tester display and press TRIGGER.

Specification:

5. Select "MAF V" on the NGS tester display and press START. The NGS tester measures and shows the voltage.
- If not as specified, perform the MAF sensor circuit open/short inspection.




a. Harness continuity
- Between PCM terminal 88 and mass airflow sensor terminal E
- Between PCM terminal 36 and mass airflow sensor terminal D
- Between PCM terminal 103 and mass airflow sensor terminal C
- Between main relay terminal E and mass airflow sensor terminal B

b. Terminal voltage
- Mass air flow sensor terminal B voltage: Battery positive voltage
- Mass air flow sensor terminal C voltage: Below 1.0 V

6. If the terminal voltage is correct and there is harness continuity, replace the mass air flow sensor. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION.)

Specification:

MAF rate and load valve

NOTE: The NGS shows the mass air flow rate and load value.