DC15 - Check MAF Circuit For Shorts to GND and MAF RTN Circuit
- Key "OFF".
- Mass Air Flow (MAF) sensor disconnected.
- Breakout box installed, Powertrain Control Module (PCM) disconnected.
- Measure resistance between test pin 50 and test pins 9, 40 and 60 at the breakout box.
- Is each resistance greater than 10,000 ohms?
Yes -- Go to DC16. DC16 - Check PWR GND Circuit Continuity
No -- Service short circuit(s). Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)