Operation CHARM: Car repair manuals for everyone.
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

Using SSTs (NGS)

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




2. Connect the New Generation Star (NGS) tester to the data link connector 2.
3. Select the PID/DATA MONITOR AND RECORD function of the NGS.
4. Select "MAF V" on the NGS display. The NGS measures and shows the voltage.







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