Short circuit

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.

If there is continuity, there is a short circuit. Repair or replace the wiring harness.
- EGR valve terminal E and GND
- EGR valve terminal A and GND
- EGR valve terminal B and GND
- EGR valve terminal F and GND
- EGR valve terminal C or D and power supply

3. Remove the EGR valve, and inspect for any damage or clogging.
- If there is no damage or no clogging, replace the EGR valve.
  
  Fig 1: Identifying Wiring Harness Connectors Terminals
  Courtesy of MAZDA MOTORS CORP.