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)