DC11 - Check PWR GND Circuit to MAF Sensor

- Key Off.

- MAF sensor disconnected.

- Breakout box installed.

- PCM connected to breakout box.

- Key On, Engine Off.

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

- Is the voltage greater than 10.5 volts?

YES -- PWR GND harness circuit from battery negative post to MAF sensor is OK. Go to DC13. DC13 - Check MAF RTN Circuit Continuity

NO -- Go to D12. DC12 - Check PWR GND Circuit Continuity