DC12 - Check Vehicle Harness For Intermittent Opens or Shorts

- Key "ON", engine "OFF".

- Digital Volt/Ohm Meter (DVOM) connected between test pin 50 (Sequential Fuel Injection (SFI) vehicles) or test pin 14 (Multiport Fuel Injection (MFI) vehicles) and test pin 9 (SFI vehicles) or test pin 15 (MFI vehicles) at the breakout box.

- Grasp the vehicle harness closest to the Mass Air Flow Sensor (MAF) sensor connector. Shake and bend a small section of the vehicle harness while working toward the dash panel. Also wiggle, shake and bend the vehicle harness from the dash panel to the Powertrain Control Module (PCM).

- Is a fault indicated?

Yes -- Isolate fault and service as necessary. Clear continuous memory. Clearing Diagnostic Trouble Codes

Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)

No -- Reconnect all components. Unable to duplicate and/or identify fault at this time. For further diagnosis, refer to Diagnosis by Symptom (Diagnostic Routines).