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

DC2 - Check MAF Sensor Ground

- Key "ON", engine "OFF".

- Mass Air Flow (MAF) sensor disconnected.

- Measure voltage between VPWR circuit and PWR GND circuit at the MAF sensor vehicle harness connector.

- Is voltage greater than 10.5 volts?

Yes -- Go to DC13. DC13 - Air Leak at MAF Sensor

No -- Service open PWR GND circuit. Reconnect MAF sensor. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)