DC8 - Check Continuity of VPWR Circuit

- Key Off.

- MAF sensor disconnected.

- Disconnect PCM. Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

- Install breakout box, leave PCM disconnected.

- Measure resistance between VPWR circuit at the MAF sensor vehicle harness connector and Test Pin 71 or 97 (VPWR) at the breakout box.

- Is resistance less than 5.0 ohms?

YES -- VPWR harness circuit to PCM is OK. Go to DC9. DC9 - Check MAF Circuit For Short to GND and MAF RTN Circuit

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