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 show the voltage.
- If not as specified, inspect following harness continuity and terminal voltage.
- If the terminal voltage is correct and there is harness continuity, replace the mass air flow sensor.

a. Harness continuity
- Between PCM terminal 88 and mass air flow sensor terminal E
- Between PCM terminal 36 and mass air flow sensor terminal D
- Between PCM terminal 76 and mass air flow sensor terminal C
- Between main relay terminal E and mass air flow 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

Specification:

MAF Rate and Load Value

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