DC14 - Check Continuity of MAF and VPWR Circuits

- Key "OFF".

- Disconnect sensor.

- Disconnect Powertrain Control Module (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 Mass Air Flow (MAF) sensor vehicle harness connector and test pins 37 and 57 at the breakout box.

For Multiport Fuel Injection (MFI) vehicles:

- Measure resistance between MAF circuit at the MAF sensor vehicle harness connector and test pin 14 at the breakout box.

For Sequential Fuel Injection (SFI) vehicles:

- Measure resistance between MAF circuit at the MAF sensor vehicle harness connector and test pin 50 at the breakout box.

- Is each resistance less than 5.0 ohms?

Yes -- Go to DC15. DC15 - Check MAF Circuit For Shorts to GND and MAF RTN Circuit

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