DC12 - Check PWR GND Circuit Continuity

- Key Off.

- MAF sensor disconnected.

- Breakout box installed.

- Disconnect PCM.

- Disconnect Scan Tool from DLC.

- Measure the resistance between PWR GND circuit at the MAF sensor vehicle harness connector and battery negative post.

- Is the resistance less than 10 ohms?

YES -- PWR GND harness circuit to MAF sensor is OK. RECONNECT Scan Tool. GO to DC13. DC13 - Check MAF RTN Circuit Continuity

NO -- SERVICE open in PWR GND harness circuit. REMOVE breakout box. RECONNECT all components. Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes