DC22 - Check MAF Circuit For Short to VPWR

- Key "OFF".

- Mass Air Flow (MAF) sensor disconnected.

- Disconnected Powertrain Control Module (PCM). Inspect for damaged or pushed out pins, corrosion, loose wires, etc. Service as necessary.

- Disconnect scan tool from data link connector (if applicable).

- Measure resistance between MAF circuit and VPWR circuit at the MAF sensor vehicle harness connector.

- Is resistance greater than 10,000 ohms?

Yes -- Replace PCM. Remove breakout box. Reconnect MAF sensor. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

No -- Service short circuit. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)